{ "citation": "ADU Zoning Hub. ADU city rules dataset. Accessed from https://www.aduzoning.org/data/.", "cities": [ { "adu_friendly_score": 6, "average_build_cost": "$125,000-$250,000", "average_rent_1br": "$1,350-$1,700/mo", "average_rent_2br": "$1,600-$2,000/mo", "city": "Chandler", "cost_per_sqft": "$140-$280", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "Confirm with Chandler Development Services", "last_updated": "2026-06-10", "permit_fees": "Valuation-based per Chandler fee schedule using ICC Building Valuation Data (minimum permit fee $60); third-party guides estimate roughly 1.5-2% of construction value plus plan review \u2014 confirm exact amounts with Chandler Development Services", "permit_timeline": "Confirm with Chandler Development Services (480-782-3000)", "population": "279,479", "pre_approved_plans": "No city pre-approved ADU plan program identified as of June 2026 \u2014 confirm with Chandler Planning Division", "prefab_adu_cost": "$85,000-$200,000", "roi_estimate": "6-9% annual return", "short_term_rental_allowed": "Not addressed in ADU section 35-2202.2; Chandler requires short-term rental licensing citywide (City Code Chapter 22) and previously prohibited STR use of ADUs \u2014 confirm with Chandler Planning Division", "slug": "chandler-az", "source_count": 8, "state": "Arizona", "state_abbrev": "AZ", "url": "https://www.aduzoning.org/adu-rules/chandler-az/", "zoning": { "allowed_zones": "Any lot or parcel where a single-family dwelling is the principal use (Chandler City Code 35-2202.2, residential districts incl. AG-1, SF-D and others amended by Ord. 5113)", "front_setback": "Same as front yard setback of the underlying zoning district", "max_height": "Same as the building height limit of the underlying zoning district", "max_size_attached": "75% of the single-family dwelling's gross floor area or 1,000 sq ft, whichever is less", "max_size_detached": "75% of the single-family dwelling's gross floor area (interior habitable area) or 1,000 sq ft, whichever is less", "max_size_jadu": "Not a defined category in Chandler; internal ADUs follow standard ADU rules", "max_units": "1 attached + 1 detached per lot; a 3rd detached ADU allowed on lots of 1+ acre if at least one ADU is deed-restricted affordable (80% AMI)", "minimum_lot_size": "None specified in 35-2202.2; lots with an ADU cannot be split unless each resulting lot meets district minimums", "owner_occupancy": "Not required", "parking": "No additional parking may be required for ADUs under AZ HB 2720 (ARS 9-461.18); Chandler's prior 1-space ADU requirement was superseded by Ord. 5113", "rear_setback": "5 feet minimum (uninhabitable space attached to an ADU, e.g. a garage, must meet full district setbacks)", "side_setback": "5 feet minimum" } }, { "adu_friendly_score": 7, "average_build_cost": "$120,000-$240,000", "average_rent_1br": "$1,150-$1,450/mo", "average_rent_2br": "$1,400-$1,800/mo", "city": "Mesa", "cost_per_sqft": "$135-$270", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "Development impact fees apply per Mesa City Code Title 5, Chapter 17; amount varies by location and unit size \u2014 confirm with Mesa Development Services", "last_updated": "2026-06-10", "permit_fees": "Valuation-based per Mesa's Schedule of Fees & Charges; no flat ADU fee published \u2014 confirm with Mesa Development Services", "permit_timeline": "Residential plan review commonly runs days-to-weeks per third-party permit data (3-18 business days cited); confirm current turnaround on Mesa's Building Permits Dashboard", "population": "517,142", "pre_approved_plans": "No city pre-approved ADU plan program identified as of June 2026 \u2014 confirm with Mesa Development Services", "prefab_adu_cost": "$85,000-$200,000", "roi_estimate": "6-9% annual return", "short_term_rental_allowed": "Ordinance 5883 does not address short-term rental of ADUs; Arizona law protects separate LONG-term leasing \u2014 confirm STR licensing rules with Mesa Planning", "slug": "mesa-az", "source_count": 9, "state": "Arizona", "state_abbrev": "AZ", "url": "https://www.aduzoning.org/adu-rules/mesa-az/", "zoning": { "allowed_zones": "All districts where a single residence is allowed (Agricultural, Residential, Commercial & Mixed-Use, Downtown); any lot with an existing single residence qualifies regardless of district (MZO 11-31-3)", "front_setback": "Same as primary residence front and street-side setbacks for the underlying district", "max_height": "Same as primary residence height limit for the underlying zoning district", "max_size_attached": "75% of primary residence's interior habitable area or 1,000 sq ft, whichever is less", "max_size_detached": "75% of primary residence's interior habitable area or 1,000 sq ft, whichever is less", "max_size_jadu": "Not a defined category in Mesa; internal/attached ADUs follow standard ADU rules", "max_units": "1 attached + 1 detached per lot; a 3rd detached ADU allowed on lots of 1+ acre if at least one ADU is income-restricted affordable (80% AMI)", "minimum_lot_size": "None \u2014 Mesa imposes no minimum lot size for ADUs", "owner_occupancy": "Not required", "parking": "No additional parking required; garage/carport conversions need not replace covered parking elsewhere (Ord. 5883)", "rear_setback": "5 feet minimum for new structures; existing-structure conversions require no additional setback", "side_setback": "5 feet minimum for new structures" } }, { "adu_friendly_score": 6, "average_build_cost": "$120,000-$240,000", "average_rent_1br": "$1,250-$1,700/mo", "average_rent_2br": "$1,600-$2,200/mo", "city": "Phoenix", "cost_per_sqft": "$135-$270", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "$900-$1,600", "last_updated": "2026-06-07", "permit_fees": "$2,500-$4,200", "permit_timeline": "60-90 days", "population": "1,629,467", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$85,000-$200,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Varies by neighborhood", "slug": "phoenix-az", "source_count": 9, "state": "Arizona", "state_abbrev": "AZ", "url": "https://www.aduzoning.org/adu-rules/phoenix-az/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "25 feet", "max_height": "15 ft (use permit may allow more)", "max_size_attached": "75% of primary dwelling, capped at 1,000 sq ft (lots \u226410,000 sq ft)", "max_size_detached": "900 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required", "parking": "No additional parking required (AZ HB 2720, effective Jan 2025)", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 5, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,500-$2,000/mo", "average_rent_2br": "$1,900-$2,600/mo", "city": "Scottsdale", "cost_per_sqft": "$200-$400", "garage_conversion_cost": "$75,000-$170,000", "impact_fees": "$2,000-$3,000", "last_updated": "2026-06-07", "permit_fees": "$5,000-$8,000", "permit_timeline": "120-180 days", "population": "258,069", "pre_approved_plans": "Not available", "prefab_adu_cost": "$110,000-$240,000", "roi_estimate": "4-6% annual return", "short_term_rental_allowed": "Not permitted", "slug": "scottsdale-az", "source_count": 6, "state": "Arizona", "state_abbrev": "AZ", "url": "https://www.aduzoning.org/adu-rules/scottsdale-az/", "zoning": { "allowed_zones": "Very limited residential zones", "front_setback": "30 feet", "max_height": "30 feet", "max_size_attached": "1,000 sq ft or 75% of primary dwelling (whichever is less)", "max_size_detached": "1,000 sq ft or 75% of primary dwelling (whichever is less); 500 sq ft for second/third ADU", "max_size_jadu": "Not allowed", "max_units": "1 attached + 1 detached per lot (2 total); up to 3 on lots 1+ acre", "minimum_lot_size": "7,500 sq ft", "owner_occupancy": "Not required for long-term rental; required only if ADU used as vacation rental", "parking": "No additional parking required (AZ HB 2720)", "rear_setback": "25 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 5, "average_build_cost": "$110,000-$220,000", "average_rent_1br": "$1,100-$1,500/mo", "average_rent_2br": "$1,400-$1,900/mo", "city": "Tucson", "cost_per_sqft": "$145-$290", "garage_conversion_cost": "$55,000-$130,000", "impact_fees": "$1,200-$2,000", "last_updated": "2026-06-07", "permit_fees": "$3,500-$5,500", "permit_timeline": "90-120 days", "population": "542,629", "pre_approved_plans": "Not available", "prefab_adu_cost": "$80,000-$180,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Not permitted", "slug": "tucson-az", "source_count": 6, "state": "Arizona", "state_abbrev": "AZ", "url": "https://www.aduzoning.org/adu-rules/tucson-az/", "zoning": { "allowed_zones": "Limited to select residential zones", "front_setback": "25 feet", "max_height": "30 feet", "max_size_attached": "75% of primary dwelling, up to 1,000 sq ft (minimum 650 sq ft guaranteed)", "max_size_detached": "75% of primary dwelling, up to 1,000 sq ft (minimum 650 sq ft guaranteed)", "max_size_jadu": "Not allowed", "max_units": "2 per lot (3 on lots over 1 acre if at least one is affordable)", "minimum_lot_size": "6,000 sq ft", "owner_occupancy": "May be required in some zones", "parking": "No parking required (effective November 2024, AZ HB 2720)", "rear_setback": "20 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$130,000-$290,000", "average_rent_1br": "$1,700-$2,300/mo", "average_rent_2br": "$2,000-$2,800/mo", "city": "Anaheim", "cost_per_sqft": "$195-$350", "garage_conversion_cost": "$75,000-$165,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$3,500-$12,000", "permit_timeline": "60 days", "population": "350,365", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$100,000-$235,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Strict STR regulations; limited to certain areas", "slug": "anaheim-ca", "source_count": 6, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/anaheim-ca/", "zoning": { "allowed_zones": "All residential zones (RS-1, RS-2, RS-3, RS-4, RM-1, RM-2, RM-3, RM-4)", "front_setback": "Per underlying zone", "max_height": "25 ft", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU", "minimum_lot_size": "No minimum", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 9, "average_build_cost": "$250,000-$500,000", "average_rent_1br": "$2,300-$2,900/mo", "average_rent_2br": "$3,000-$3,900/mo", "city": "Berkeley", "cost_per_sqft": "$400-$700", "garage_conversion_cost": "$120,000-$250,000", "impact_fees": "Land Use Planning assesses no impact fees. Berkeley Unified School District facility fees apply to residential projects over 500 sq ft of livable space", "last_updated": "2026-06-10", "permit_fees": "$250 zoning plan check + $500 neighbor noticing fee at submittal + $250 address assignment; building permit fees based on project valuation (city fee estimator tool available)", "permit_timeline": "60-day ministerial review; deemed approved if the city fails to act within 60 days (SB 543, eff. Jan 1, 2026)", "population": "124,321", "pre_approved_plans": "Yes \u2014 the city points applicants to pre-approved ADU designs as a faster, less expensive path to permit approval", "prefab_adu_cost": "$250,000-$320,000", "roi_estimate": "4-7% annual return", "short_term_rental_allowed": "No \u2014 recorded deed restriction prohibits short-term rental of the ADU/JADU (narrow exception for ADUs established before April 1, 2017 per BMC 23.314.040(D))", "slug": "berkeley-ca", "source_count": 8, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/berkeley-ca/", "zoning": { "allowed_zones": "Any lot zoned to allow residential use with an existing or proposed dwelling, including duplex and multifamily lots (BMC Chapter 23.306)", "front_setback": "ADUs may be placed within the front setback", "max_height": "Detached new construction: 25 ft (20 ft within Hillside Overlay); attached: 25 ft or the existing building height, whichever is lower; +9 ft allowance for rooftop deck access and railings (BMC 23.306.030(D))", "max_size_attached": "Same limits as detached (1,200 sq ft outside Hillside Overlay); conversions of existing space have no size cap", "max_size_detached": "1,200 sq ft outside the Hillside Overlay; 850 sq ft (studio/1-bedroom) or 1,000 sq ft (2+ bedrooms) within the Hillside Overlay", "max_size_jadu": "500 sq ft (within walls of an existing or proposed single-family dwelling, including attached garage)", "max_units": "Single-family lot: 1 conversion ADU + 1 new-construction ADU + 1 JADU. Existing multifamily: up to 8 detached ADUs (not exceeding the number of existing units) plus interior ADUs up to 25% of existing units", "minimum_lot_size": "None \u2014 any residentially zoned lot with an existing or proposed dwelling qualifies", "owner_occupancy": "Not required for ADUs. JADUs with separate sanitation facilities are exempt (AB 1154, eff. Jan 1, 2026); JADUs sharing a bathroom with the main home still require owner-occupancy. Prior owner-occupancy deed restrictions can be rescinded ($500 city fee)", "parking": "None required for ADUs or JADUs; displaced garage parking does not need to be replaced", "rear_setback": "4 ft minimum", "side_setback": "4 ft minimum (interior or street side); architectural features may project 2 ft if 2 ft remains to the property line" } }, { "adu_friendly_score": 8, "average_build_cost": "$160,000-$270,000", "average_rent_1br": "$1,300-$1,700", "average_rent_2br": "$1,700-$2,200", "city": "Fontana", "cost_per_sqft": "$200-$250", "garage_conversion_cost": "$75,000-$130,000", "impact_fees": "Waived for units under 750 sq ft (SB 13); proportional for larger units", "last_updated": "2026-06-10", "permit_fees": "Waived for ADUs under 750 sq ft; fee applies for larger units (amount varies)", "permit_timeline": "~60 days with pre-approved plans", "population": "214,233", "pre_approved_plans": "AB 1332 standard ADU plans available on City website", "prefab_adu_cost": "$80,000-$140,000", "roi_estimate": "7-10 year payback", "short_term_rental_allowed": "Subject to local ordinance; verify before planning", "slug": "fontana-ca", "source_count": 2, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/fontana-ca/", "zoning": { "allowed_zones": "All residential zones and mixed-use zones with residential", "front_setback": "Base zone compliance", "max_height": "16 ft (standard); 18 ft if within 1/2 mile of transit or 2-story home; 25 ft possible", "max_size_attached": "1200 sq ft or 50% of primary dwelling, whichever is less", "max_size_detached": "1200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per lot", "minimum_lot_size": "No specific state minimum", "owner_occupancy": "Not required under state law", "parking": "No additional required; no requirement for conversions", "rear_setback": "4 ft minimum (detached new construction)", "side_setback": "4 ft minimum (interior side, detached)" } }, { "adu_friendly_score": 7, "average_build_cost": "$80,000-$200,000", "average_rent_1br": "$1,000-$1,400/mo", "average_rent_2br": "$1,200-$1,700/mo", "city": "Fresno", "cost_per_sqft": "$120-$250", "garage_conversion_cost": "$50,000-$120,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$2,500-$8,000", "permit_timeline": "60 days", "population": "542,107", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$70,000-$180,000", "roi_estimate": "9-14% annual return", "short_term_rental_allowed": "Allowed in most areas", "slug": "fresno-ca", "source_count": 6, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/fresno-ca/", "zoning": { "allowed_zones": "RS, RM, and all residential zones", "front_setback": "Per underlying zone", "max_height": "25 ft", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU", "minimum_lot_size": "No minimum", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 8, "average_build_cost": "$120,000-$280,000", "average_rent_1br": "$1,500-$2,100/mo", "average_rent_2br": "$1,900-$2,700/mo", "city": "Long Beach", "cost_per_sqft": "$180-$330", "garage_conversion_cost": "$70,000-$150,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$3,000-$10,000", "permit_timeline": "60 days; often 30-45 in practice", "population": "466,742", "pre_approved_plans": "Yes \u2014 city has pre-approved ADU plans", "prefab_adu_cost": "$90,000-$220,000", "roi_estimate": "7-11% annual return", "short_term_rental_allowed": "Allowed with business license; STR regulations apply", "slug": "long-beach-ca", "source_count": 7, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/long-beach-ca/", "zoning": { "allowed_zones": "All residential zones; R-1, R-2, R-3, R-4 and planned development zones", "front_setback": "Per underlying zone", "max_height": "25 ft", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU", "minimum_lot_size": "No minimum", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 9, "average_build_cost": "$150,000-$350,000", "average_rent_1br": "$1,800-$2,500/mo", "average_rent_2br": "$2,200-$3,200/mo", "city": "Los Angeles", "cost_per_sqft": "$200-$400", "garage_conversion_cost": "$80,000-$180,000", "impact_fees": "Waived for units under 750 sq ft (state law)", "last_updated": "2026-06-10", "permit_fees": "$4,000-$15,000 depending on size and type (plus 10% General Plan Maintenance Surcharge on permit fees as of June 9, 2026)", "permit_timeline": "60-day ministerial review (state-mandated)", "population": "3,898,747", "pre_approved_plans": "Yes \u2014 LA has a Standard Plan Program with pre-approved designs", "prefab_adu_cost": "$100,000-$250,000", "roi_estimate": "6-10% annual return", "short_term_rental_allowed": "Restricted \u2014 STR rules apply; host must be primary resident", "slug": "los-angeles-ca", "source_count": 10, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/los-angeles-ca/", "zoning": { "allowed_zones": "All residential zones (R1, R2, R3, R4, R5, RD, RW, RE, RS, RA)", "front_setback": "Must meet primary dwelling front setback", "max_height": "25 ft (2 stories) for detached; varies for attached", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per single-family lot", "minimum_lot_size": "No minimum lot size for JADUs; standard lot for detached", "owner_occupancy": "Not required (CA state law \u2014 permanent, no sunset provision)", "parking": "No parking required (eliminated statewide by AB 68)", "rear_setback": "4 ft for units \u226416 ft height", "side_setback": "4 ft for units \u226416 ft height" } }, { "adu_friendly_score": 8, "average_build_cost": "$160,000-$380,000", "average_rent_1br": "$1,800-$2,600/mo", "average_rent_2br": "$2,200-$3,200/mo", "city": "Oakland", "cost_per_sqft": "$250-$420", "garage_conversion_cost": "$90,000-$200,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$4,000-$15,000", "permit_timeline": "60 days", "population": "433,031", "pre_approved_plans": "Limited options available", "prefab_adu_cost": "$120,000-$280,000", "roi_estimate": "6-9% annual return", "short_term_rental_allowed": "Regulated; host must register and collect TOT", "slug": "oakland-ca", "source_count": 6, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/oakland-ca/", "zoning": { "allowed_zones": "All residential zones (RH, RD, RM, RU, CN)", "front_setback": "Per underlying zone", "max_height": "25 ft", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU", "minimum_lot_size": "No minimum", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 8, "average_build_cost": "$180,000-$300,000", "average_rent_1br": "$1,400-$1,800", "average_rent_2br": "$1,800-$2,300", "city": "Ontario", "cost_per_sqft": "$200-$275", "garage_conversion_cost": "$80,000-$150,000", "impact_fees": "Waived for units under 750 sq ft; proportional for larger units", "last_updated": "2026-06-10", "permit_fees": "$3,000-$6,000 estimated (building permit + plan check); minimum $47.50 per state", "permit_timeline": "30-60 days typical for compliant applications", "population": "181,224", "pre_approved_plans": "State of California offers pre-approved ADU plans", "prefab_adu_cost": "$80,000-$150,000", "roi_estimate": "8-12 year payback; 5-8% annual ROI", "short_term_rental_allowed": "Subject to local restrictions; check city ordinance", "slug": "ontario-ca", "source_count": 2, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/ontario-ca/", "zoning": { "allowed_zones": "All residential zones (R-1, R-2, R-3, etc.)", "front_setback": "Comply with base zone requirements", "max_height": "16 ft (up to 25 ft for two-story with exceptions)", "max_size_attached": "1200 sq ft or 50% of primary dwelling, whichever is less", "max_size_detached": "1200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per lot", "minimum_lot_size": "No state minimum; varies by local zoning", "owner_occupancy": "Not required under state law (local option)", "parking": "No additional parking required if within 1/2 mile of public transit; otherwise 1 space per bedroom maximum", "rear_setback": "4 ft minimum", "side_setback": "4 ft minimum (interior side)" } }, { "adu_friendly_score": 7, "average_build_cost": "$180,000-$400,000", "average_rent_1br": "$2,200-$2,900/mo", "average_rent_2br": "$3,200-$3,700/mo", "city": "Pasadena", "cost_per_sqft": "$300-$500", "garage_conversion_cost": "$120,000-$220,000", "impact_fees": "Residential Impact Fee waived for ADUs up to 900 sq ft (expanded July 2025); fully waived at any size with a Housing Agreement. Construction Tax waived for Standard Plan/affordable ADUs and reduced 25% for ADUs up to 900 sq ft", "last_updated": "2026-06-10", "permit_fees": "Roughly $5,000-$15,000 total permitting cost depending on size (builder estimates); flat refundable $1,000 Construction & Demolition deposit. Confirm exact figures with Pasadena Permit Center, (626) 744-7311", "permit_timeline": "60-day ministerial review; deemed approved if the city fails to act within 60 days (SB 543, eff. Jan 1, 2026)", "population": "138,699", "pre_approved_plans": "Paused \u2014 the city's ADU Standard Plans expired Dec 31, 2025 due to California Building Code updates. Since Jan 1, 2026 the 5 free city designs (374-750 sq ft) may only be used on properties red-tagged in the Eaton Fire; the city is evaluating new plans", "prefab_adu_cost": "$180,000-$300,000", "roi_estimate": "5-8% annual return", "short_term_rental_allowed": "No \u2014 ADUs/JADUs legally created on or after Jan 1, 2017 must be rented for terms longer than 30 days", "slug": "pasadena-ca", "source_count": 9, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/pasadena-ca/", "zoning": { "allowed_zones": "All zoning districts that permit single-family or multifamily residential uses, on lots with at least one existing or proposed dwelling (PMC 17.50.275)", "front_setback": "Underlying zone front setback applies, except for 800 sq ft Exemption ADUs", "max_height": "Detached: 18 ft / 2 stories (16 ft in Hillside Overlay, Landmark/Historic districts visible from street, or front-setback Exemption ADUs); +2 ft within 1/2 mile of major transit to match primary roof pitch. Attached: up to 25 ft / 2 stories", "max_size_attached": "850 sq ft (studio/1-bedroom) or 1,000 sq ft (2+ bedrooms)", "max_size_detached": "1,200 sq ft (new construction on single-family lots); limited to 1,000 sq ft in most Hillside Overlay districts", "max_size_jadu": "500 sq ft", "max_units": "Single-family lots: 1 ADU + 1 JADU. Multifamily lots: conversion ADUs up to 25% of existing units + 2 detached ADUs (SB 1211 may allow up to 8 detached on multifamily lots \u2014 state law prevails over local cap)", "minimum_lot_size": "None for ADUs under state-mandated pathways", "owner_occupancy": "Not required for ADUs. JADU owner-occupancy removed by AB 1154 (eff. Jan 1, 2026) where the JADU has separate sanitation facilities; still applies to shared-bath JADUs", "parking": "1 space per unit or per bedroom (whichever is less); waived within 1/2 mile of transit, in historic districts, for conversions within existing structures, or with car share within a block \u2014 most Pasadena lots qualify for a waiver", "rear_setback": "4 ft for new construction; none for conversions of existing structures", "side_setback": "4 ft for new construction; none for conversions; 6 ft eave-to-eave building separation for non-exemption detached ADUs" } }, { "adu_friendly_score": 8, "average_build_cost": "$170,000-$290,000", "average_rent_1br": "$1,400-$1,800", "average_rent_2br": "$1,800-$2,300", "city": "Rancho Cucamonga", "cost_per_sqft": "$210-$270", "garage_conversion_cost": "$80,000-$145,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "Permit fees exist but exact amounts not published online; contact city for current schedule", "permit_timeline": "30-45 days typical (no planning approval needed speeds process)", "population": "173,316", "pre_approved_plans": "City provides standard ADU designs", "prefab_adu_cost": "$80,000-$150,000", "roi_estimate": "8-12 year payback", "short_term_rental_allowed": "Local ordinance applies; verify for short-term rental policies", "slug": "rancho-cucamonga-ca", "source_count": 2, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/rancho-cucamonga-ca/", "zoning": { "allowed_zones": "R-1, R-2, R-3, HR (Hillside Residential); all residential zones", "front_setback": "Base zone requirements", "max_height": "16 ft (standard); 18 ft if main dwelling is 2-story; 25 ft with exceptions", "max_size_attached": "1200 sq ft or 50% of primary dwelling, whichever is less", "max_size_detached": "1200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per lot", "minimum_lot_size": "No specific state minimum", "owner_occupancy": "Not required", "parking": "No additional required; conversions exempt", "rear_setback": "4 ft minimum (detached new construction)", "side_setback": "4 ft minimum (interior side, detached new construction)" } }, { "adu_friendly_score": 8, "average_build_cost": "$170,000-$280,000", "average_rent_1br": "$1,300-$1,700", "average_rent_2br": "$1,700-$2,200", "city": "Riverside", "cost_per_sqft": "$200-$250", "garage_conversion_cost": "$75,000-$130,000", "impact_fees": "Waived for units under 750 sq ft per SB 13", "last_updated": "2026-06-10", "permit_fees": "$5,353.56 ADU deposit; $1,689.32 JADU deposit; $3,000-$9,000 range", "permit_timeline": "3-5 days (pre-approved plans); 10-20 days (standard custom designs)", "population": "327,868", "pre_approved_plans": "Permit-Ready ADUs (BRS-PRADU) available free from County; professionally vetted", "prefab_adu_cost": "$80,000-$140,000", "roi_estimate": "7-10 year payback; strong market fundamentals", "short_term_rental_allowed": "Verify with city; generally require 30+ day minimum", "slug": "riverside-ca", "source_count": 2, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/riverside-ca/", "zoning": { "allowed_zones": "Most residential zones (R-1, R-2, R-3, multifamily)", "front_setback": "Comply with base zone requirements", "max_height": "16 ft minimum (state-mandated); 25 ft with exceptions", "max_size_attached": "1200 sq ft or 50% of primary dwelling, whichever is less; minimum 850 sq ft guaranteed", "max_size_detached": "1200 sq ft; may reduce to 800 sq ft if lot coverage exceeded", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per lot (County); City varies", "minimum_lot_size": "No specific state minimum", "owner_occupancy": "Not required under state law", "parking": "No additional parking required", "rear_setback": "4 ft maximum (detached new construction)", "side_setback": "4 ft maximum (detached new construction); existing structures have fewer restrictions" } }, { "adu_friendly_score": 8, "average_build_cost": "$100,000-$250,000", "average_rent_1br": "$1,300-$1,800/mo", "average_rent_2br": "$1,600-$2,200/mo", "city": "Sacramento", "cost_per_sqft": "$150-$300", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$3,000-$10,000", "permit_timeline": "60 days", "population": "524,943", "pre_approved_plans": "Yes \u2014 city offers pre-approved ADU plans", "prefab_adu_cost": "$80,000-$200,000", "roi_estimate": "8-12% annual return", "short_term_rental_allowed": "Allowed with permit in certain zones", "slug": "sacramento-ca", "source_count": 8, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/sacramento-ca/", "zoning": { "allowed_zones": "R-1, R-1A, R-1B, R-2, R-2A, R-2B, R-3, R-4, R-5 zones", "front_setback": "Per underlying zone", "max_height": "25 ft", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU", "minimum_lot_size": "No minimum", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 8, "average_build_cost": "$160,000-$280,000", "average_rent_1br": "$1,300-$1,700", "average_rent_2br": "$1,700-$2,100", "city": "San Bernardino", "cost_per_sqft": "$200-$260", "garage_conversion_cost": "$75,000-$140,000", "impact_fees": "Waived under 750 sq ft (SB 13); proportional for larger units", "last_updated": "2026-06-10", "permit_fees": "$3,000-$12,000 estimated (varies by jurisdiction within County)", "permit_timeline": "60 days mandatory for approval/denial of complete applications with existing dwelling", "population": "226,541", "pre_approved_plans": "County has standard ADU plans available", "prefab_adu_cost": "$80,000-$150,000", "roi_estimate": "7-10 year payback", "short_term_rental_allowed": "Subject to city/county ordinances; verify before planning", "slug": "san-bernardino-ca", "source_count": 2, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/san-bernardino-ca/", "zoning": { "allowed_zones": "Most residential zones (R-1, R-2, R-3, multifamily)", "front_setback": "Base zone compliance", "max_height": "16 ft minimum; up to 25 ft with exceptions", "max_size_attached": "1200 sq ft or 50% of primary dwelling, whichever is less", "max_size_detached": "1200 sq ft; reduces to 800 sq ft if lot coverage exceeded", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per single-family lot; 2 ADUs on multifamily", "minimum_lot_size": "No specific state minimum", "owner_occupancy": "Not required under state law", "parking": "No additional parking required (conversions/existing exempt)", "rear_setback": "4 ft minimum (detached new construction)", "side_setback": "4 ft minimum (interior side, detached new construction)" } }, { "adu_friendly_score": 9, "average_build_cost": "$120,000-$300,000", "average_rent_1br": "$1,600-$2,200/mo", "average_rent_2br": "$2,000-$2,800/mo", "city": "San Diego", "cost_per_sqft": "$180-$350", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$3,500-$12,000", "permit_timeline": "60 days (often faster)", "population": "1,386,932", "pre_approved_plans": "Yes \u2014 companion unit program with pre-approved designs", "prefab_adu_cost": "$90,000-$220,000", "roi_estimate": "7-11% annual return", "short_term_rental_allowed": "Allowed with STRO license in certain zones", "slug": "san-diego-ca", "source_count": 8, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/san-diego-ca/", "zoning": { "allowed_zones": "All residential zones; also allowed in some commercial mixed-use zones", "front_setback": "Per underlying zone", "max_height": "25 ft (2 stories)", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per single-family lot; up to 8 on multifamily", "minimum_lot_size": "No minimum lot size for JADUs", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 9, "average_build_cost": "$200,000-$450,000", "average_rent_1br": "$2,200-$3,200/mo", "average_rent_2br": "$2,800-$4,000/mo", "city": "San Francisco", "cost_per_sqft": "$300-$500", "garage_conversion_cost": "$120,000-$250,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-06-10", "permit_fees": "$5,000-$20,000 depending on scope", "permit_timeline": "60-day review period (state-mandated)", "population": "808,437", "pre_approved_plans": "Yes \u2014 SF has pre-approved ADU plan sets", "prefab_adu_cost": "$150,000-$350,000", "roi_estimate": "5-8% annual return", "short_term_rental_allowed": "Heavily regulated; 90-day annual cap for unhosted", "slug": "san-francisco-ca", "source_count": 9, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/san-francisco-ca/", "zoning": { "allowed_zones": "RH-1, RH-2, RH-3, RM, RTO zones and most residential districts", "front_setback": "Must meet zone's front setback requirement", "max_height": "25 ft for detached ADUs", "max_size_attached": "1,000 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft (state minimum; local program caps at 850-1,000 sq ft)", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU per lot", "minimum_lot_size": "No minimum lot size", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft minimum", "side_setback": "4 ft minimum" } }, { "adu_friendly_score": 8, "average_build_cost": "$180,000-$400,000", "average_rent_1br": "$2,000-$2,800/mo", "average_rent_2br": "$2,500-$3,500/mo", "city": "San Jose", "cost_per_sqft": "$250-$450", "garage_conversion_cost": "$100,000-$220,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$4,000-$14,000", "permit_timeline": "60 days", "population": "1,013,240", "pre_approved_plans": "Limited pre-approved options available", "prefab_adu_cost": "$130,000-$300,000", "roi_estimate": "5-9% annual return", "short_term_rental_allowed": "Restricted; requires transient occupancy tax registration", "slug": "san-jose-ca", "source_count": 8, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/san-jose-ca/", "zoning": { "allowed_zones": "All residential zones (R-1, R-2, R-M, R-MH)", "front_setback": "Per underlying zone", "max_height": "25 ft for detached", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU", "minimum_lot_size": "No minimum", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 7, "average_build_cost": "$130,000-$300,000", "average_rent_1br": "$1,700-$2,300/mo", "average_rent_2br": "$2,100-$2,900/mo", "city": "Santa Ana", "cost_per_sqft": "$200-$360", "garage_conversion_cost": "$75,000-$170,000", "impact_fees": "Waived for units under 750 sq ft", "last_updated": "2026-04-28", "permit_fees": "$3,500-$12,000", "permit_timeline": "60 days", "population": "310,227", "pre_approved_plans": "In development", "prefab_adu_cost": "$100,000-$240,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Regulated; check city STR ordinance", "slug": "santa-ana-ca", "source_count": 7, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/santa-ana-ca/", "zoning": { "allowed_zones": "All residential zones (R1, R2, R3)", "front_setback": "Per underlying zone", "max_height": "25 ft", "max_size_attached": "1,200 sq ft or 50% of primary dwelling", "max_size_detached": "1,200 sq ft", "max_size_jadu": "500 sq ft", "max_units": "1 ADU + 1 JADU", "minimum_lot_size": "No minimum", "owner_occupancy": "Not required", "parking": "No parking required", "rear_setback": "4 ft", "side_setback": "4 ft" } }, { "adu_friendly_score": 8, "average_build_cost": "$250,000-$500,000", "average_rent_1br": "$3,000-$3,700/mo", "average_rent_2br": "$4,000-$4,700/mo", "city": "Santa Monica", "cost_per_sqft": "$350-$550", "garage_conversion_cost": "$140,000-$245,000", "impact_fees": "ADUs under 750 sq ft are exempt from residential impact fees; 750 sq ft and larger pay fees proportional to the primary dwelling size (includes Santa Monica-Malibu USD school fees)", "last_updated": "2026-06-10", "permit_fees": "Valuation-based plan check and building permit fees paid through Citizen Access; confirm current totals with Santa Monica Building & Safety via the 311 system", "permit_timeline": "60 days \u2014 application deemed approved if the city does not act within 60 days (SMMC per SB 543, eff. Jan 1, 2026); Coastal Zone CDP adds months to the front end", "population": "93,076", "pre_approved_plans": "Program established (under AB 1332) for vendor-submitted preapproved Standard ADU Plans \u2014 detached ADUs only, no modifications allowed; as of mid-2026 no vendor plans are listed yet ('NONE AT THIS TIME')", "prefab_adu_cost": "$200,000-$350,000", "roi_estimate": "5-8% annual return", "short_term_rental_allowed": "No \u2014 ADUs/JADUs may not be rented for terms of 30 days or less", "slug": "santa-monica-ca", "source_count": 9, "state": "California", "state_abbrev": "CA", "url": "https://www.aduzoning.org/adu-rules/santa-monica-ca/", "zoning": { "allowed_zones": "Any legal parcel zoned for single-unit or multiple-unit residential use (including residential and mixed-use properties) with an existing or proposed dwelling (SMMC 9.31.025)", "front_setback": "Not permitted within the required front setback of the underlying zone (JADUs within existing structures are exempt)", "max_height": "Detached: 2 stories or 24 ft (measured per SMMC 9.04.050, typically from Average Natural Grade); attached ADUs and JADUs: underlying zoning district height limits for the primary dwelling", "max_size_attached": "850 sq ft (studio/1-BR) or 1,200 sq ft (2+ BR), but not more than 50% of the existing primary dwelling (minimum 800 sq ft guaranteed for conversions of the primary dwelling)", "max_size_detached": "850 sq ft (studio/1-bedroom) or 1,200 sq ft (2+ bedrooms)", "max_size_jadu": "500 sq ft (within the footprint of an existing or proposed single-unit dwelling)", "max_units": "Single-unit-dwelling parcels may combine: 1 converted ADU + 1 JADU + 1 detached ADU, plus 1 additional attached ADU on R1-zoned parcels \u2014 up to 3 accessory units alongside the main home", "minimum_lot_size": "None", "owner_occupancy": "Not required for ADUs. City guide requires owner-occupancy for JADUs (SUD or JADU); AB 1154 (eff. Jan 1, 2026) removes this for JADUs with separate sanitation \u2014 state law prevails", "parking": "No on-site parking required; parking eliminated by a garage conversion does not need to be replaced (contact Rent Control re: rent-controlled parking amenities; Coastal Zone parcels should confirm with the Coastal Commission)", "rear_setback": "4 ft; none for conversions of existing structures (including pre-Jan 1, 2020 unpermitted structures being legalized)", "side_setback": "4 ft; minimum 4 ft separation between a detached ADU and the primary dwelling, measured between exterior walls" } }, { "adu_friendly_score": 8, "average_build_cost": "$160,000-$320,000", "average_rent_1br": "$1,600-$2,100/mo", "average_rent_2br": "$2,000-$2,800/mo", "city": "Boulder", "cost_per_sqft": "$140-$280", "garage_conversion_cost": "$80,000-$180,000", "impact_fees": "Minimal", "last_updated": "2026-06-07", "permit_fees": "$1,900-$3,200", "permit_timeline": "40-60 days", "population": "108,250", "pre_approved_plans": "Available", "prefab_adu_cost": "$120,000-$270,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Limited restrictions", "slug": "boulder-co", "source_count": 8, "state": "Colorado", "state_abbrev": "CO", "url": "https://www.aduzoning.org/adu-rules/boulder-co/", "zoning": { "allowed_zones": "All single-family and multi-family zones", "front_setback": "15 feet", "max_height": "20-25 ft (detached, depends on roof pitch); 35 ft (attached)", "max_size_attached": "Up to 50% of principal structure or 1,000 sq ft max", "max_size_detached": "800 sq ft (market-rate); 1,000 sq ft (affordable ADU program)", "max_size_jadu": "800 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "3,500 sq ft", "owner_occupancy": "Not required (eliminated March 2025, per CO HB 24-1152)", "parking": "No parking required (eliminated March 2025)", "rear_setback": "10 feet", "side_setback": "3 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$130,000-$260,000", "average_rent_1br": "$1,250-$1,700/mo", "average_rent_2br": "$1,600-$2,200/mo", "city": "Colorado Springs", "cost_per_sqft": "$130-$260", "garage_conversion_cost": "$65,000-$155,000", "impact_fees": "$600-$1,200", "last_updated": "2026-06-07", "permit_fees": "$1,800-$3,000", "permit_timeline": "45-65 days", "population": "478,961", "pre_approved_plans": "Available for select types", "prefab_adu_cost": "$95,000-$210,000", "roi_estimate": "8-10% annual return", "short_term_rental_allowed": "Not typically permitted", "slug": "colorado-springs-co", "source_count": 7, "state": "Colorado", "state_abbrev": "CO", "url": "https://www.aduzoning.org/adu-rules/colorado-springs-co/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "20 feet", "max_height": "16 ft (detached ADUs); 25 ft (converted garage ADUs)", "max_size_attached": "50% of principal dwelling or 1,250 sq ft (whichever is less)", "max_size_detached": "50% of principal dwelling or 1,250 sq ft (whichever is less); 750 sq ft max if principal < 1,500 sq ft", "max_size_jadu": "700 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "4,500 sq ft", "owner_occupancy": "Not required (removed April 2025, per CO HB 24-1152)", "parking": "No parking required (removed April 2025)", "rear_setback": "12 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 8, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,400-$1,900/mo", "average_rent_2br": "$1,800-$2,500/mo", "city": "Denver", "cost_per_sqft": "$130-$260", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "Minimal", "last_updated": "2026-06-07", "permit_fees": "$1,600-$2,700", "permit_timeline": "30-45 days", "population": "727,211", "pre_approved_plans": "Extensive library available", "prefab_adu_cost": "$100,000-$230,000", "roi_estimate": "7-9% annual return", "short_term_rental_allowed": "Yes, with STR license", "slug": "denver-co", "source_count": 9, "state": "Colorado", "state_abbrev": "CO", "url": "https://www.aduzoning.org/adu-rules/denver-co/", "zoning": { "allowed_zones": "All residential zones", "front_setback": "15 feet", "max_height": "24 ft maximum", "max_size_attached": "864 sq ft", "max_size_detached": "864 sq ft", "max_size_jadu": "800 sq ft", "max_units": "1 detached + 1 attached per lot", "minimum_lot_size": "3,500 sq ft", "owner_occupancy": "Required in single-unit zones (owner must live in primary or ADU)", "parking": "1 space per unit", "rear_setback": "Must be within rear 35% of lot; 5 ft minimum rear setback", "side_setback": "3 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$150,000-$250,000", "average_rent_1br": "$1,400-$2,000", "average_rent_2br": "$1,800-$2,800", "city": "Washington", "cost_per_sqft": "$300-$400", "garage_conversion_cost": "$0-$0", "impact_fees": "Utility connection fees apply", "last_updated": "2026-06-07", "permit_fees": "$1,000-$3,000 building permits; additional utility costs", "permit_timeline": "6-12 months total (planning through final inspection); 8-12 months typical", "population": "693,645", "pre_approved_plans": "Standard basement conversion and detached plans available", "prefab_adu_cost": "$100,000-$150,000", "roi_estimate": "10-15 year payback; strong appreciation in DC market", "short_term_rental_allowed": "Rental license required if renting; 30-day minimum suggested but not mandated", "slug": "washington-dc", "source_count": 2, "state": "District of Columbia", "state_abbrev": "DI", "url": "https://www.aduzoning.org/adu-rules/washington-dc/", "zoning": { "allowed_zones": "Most R (residential) zones; varies by specific district", "front_setback": "Standard zone requirements", "max_height": "2 stories; 22 ft maximum (detached)", "max_size_attached": "35% of gross floor area of primary dwelling; maximum 1,000 sq ft total", "max_size_detached": "Greater of 30% of required rear yard OR 450 sq ft", "max_size_jadu": "N/A (DC uses basement apartments/ADUs)", "max_units": "1 accessory apartment per lot only", "minimum_lot_size": "1,200 sq ft gross land area minimum for detached", "owner_occupancy": "Required - either main house or ADU must be owner-occupied", "parking": "Not required for ADU (only primary dwelling)", "rear_setback": "Minimum 7.5 ft from alley centerline (if applicable)", "side_setback": "Standard zone requirements" } }, { "adu_friendly_score": 5, "average_build_cost": "$125,000-$245,000", "average_rent_1br": "$1,100-$1,600/mo", "average_rent_2br": "$1,400-$2,000/mo", "city": "Jacksonville", "cost_per_sqft": "$155-$305", "garage_conversion_cost": "$60,000-$145,000", "impact_fees": "$1,300-$2,000", "last_updated": "2026-06-10", "permit_fees": "$3,200-$5,000", "permit_timeline": "80-110 days", "population": "949,611", "pre_approved_plans": "Not available", "prefab_adu_cost": "$90,000-$210,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Varies by district", "slug": "jacksonville-fl", "source_count": 6, "state": "Florida", "state_abbrev": "FL", "url": "https://www.aduzoning.org/adu-rules/jacksonville-fl/", "zoning": { "allowed_zones": "Select residential districts", "front_setback": "25 feet", "max_height": "Must not exceed height of primary residence", "max_size_attached": "25% of primary residence or 750 sq ft (whichever is smaller)", "max_size_detached": "25% of primary residence or 750 sq ft (whichever is smaller)", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "7,500 sq ft", "owner_occupancy": "Required \u2014 owner must occupy either the primary residence or the ADU (cannot rent out both) per Ord. 2022-0448-E", "parking": "1 space", "rear_setback": "20 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 5, "average_build_cost": "$180,000-$350,000", "average_rent_1br": "$1,600-$2,200/mo", "average_rent_2br": "$2,000-$3,000/mo", "city": "Miami", "cost_per_sqft": "$240-$460", "garage_conversion_cost": "$80,000-$180,000", "impact_fees": "$2,000-$3,500", "last_updated": "2026-06-10", "permit_fees": "$5,000-$8,000", "permit_timeline": "120-180 days", "population": "442,241", "pre_approved_plans": "Yes \u2014 Miami-Dade County ADU Blueprint program offers pre-approved designs for faster permitting", "prefab_adu_cost": "$120,000-$260,000", "roi_estimate": "5-7% annual return", "short_term_rental_allowed": "Not permitted", "slug": "miami-fl", "source_count": 9, "state": "Florida", "state_abbrev": "FL", "url": "https://www.aduzoning.org/adu-rules/miami-fl/", "zoning": { "allowed_zones": "Limited to select residential zones", "front_setback": "25 feet", "max_height": "Must not exceed height of principal structure", "max_size_attached": "400-800 sq ft (varies by district)", "max_size_detached": "400-800 sq ft (varies by district)", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "8,000 sq ft", "owner_occupancy": "Not required", "parking": "Maximum 1 additional space (no more than 2 vehicles); must be on-site or in adjacent swale (Miami-Dade County)", "rear_setback": "5 ft (RU-1 district)", "side_setback": "5 feet" } }, { "adu_friendly_score": 6, "average_build_cost": "$130,000-$260,000", "average_rent_1br": "$1,200-$1,750/mo", "average_rent_2br": "$1,550-$2,300/mo", "city": "Orlando", "cost_per_sqft": "$145-$290", "garage_conversion_cost": "$60,000-$145,000", "impact_fees": "$1,100-$1,900", "last_updated": "2026-06-10", "permit_fees": "$2,800-$4,500", "permit_timeline": "60-85 days", "population": "307,573", "pre_approved_plans": "Available for select ADU types", "prefab_adu_cost": "$90,000-$210,000", "roi_estimate": "7-9% annual return", "short_term_rental_allowed": "Limited in some zones", "slug": "orlando-fl", "source_count": 7, "state": "Florida", "state_abbrev": "FL", "url": "https://www.aduzoning.org/adu-rules/orlando-fl/", "zoning": { "allowed_zones": "Residential single-family zones", "front_setback": "20 feet", "max_height": "16 ft maximum", "max_size_attached": "500-1,000 sq ft (varies by district and sector)", "max_size_detached": "500-1,000 sq ft (varies by district and sector)", "max_size_jadu": "500 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "6,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space for ADU", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 5, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,300-$1,850/mo", "average_rent_2br": "$1,650-$2,400/mo", "city": "Tampa", "cost_per_sqft": "$180-$350", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "$1,400-$2,200", "last_updated": "2026-06-10", "permit_fees": "$3,500-$5,500", "permit_timeline": "75-100 days", "population": "400,723", "pre_approved_plans": "Not available", "prefab_adu_cost": "$100,000-$230,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Restricted in most zones", "slug": "tampa-fl", "source_count": 7, "state": "Florida", "state_abbrev": "FL", "url": "https://www.aduzoning.org/adu-rules/tampa-fl/", "zoning": { "allowed_zones": "Residential single-family zones", "front_setback": "25 feet", "max_height": "22.5-35 ft (varies by overlay district; must not exceed principal structure)", "max_size_attached": "600 sq ft", "max_size_detached": "950 sq ft maximum (750 sq ft threshold affects setback requirements)", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "7,500 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "3 ft (ADUs \u2264750 sq ft); 15-20 ft (ADUs >750 sq ft, varies by district)", "side_setback": "3 ft (ADUs \u2264750 sq ft); 5-7 ft (ADUs >750 sq ft, varies by district)" } }, { "adu_friendly_score": 6, "average_build_cost": "$120,000-$240,000", "average_rent_1br": "$1,300-$1,750/mo", "average_rent_2br": "$1,650-$2,300/mo", "city": "Atlanta", "cost_per_sqft": "$140-$280", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "$900-$1,600", "last_updated": "2026-06-07", "permit_fees": "$2,400-$4,000", "permit_timeline": "55-80 days", "population": "498,044", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$85,000-$190,000", "roi_estimate": "7-9% annual return", "short_term_rental_allowed": "Restricted in some zones", "slug": "atlanta-ga", "source_count": 5, "state": "Georgia", "state_abbrev": "GA", "url": "https://www.aduzoning.org/adu-rules/atlanta-ga/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "700 sq ft", "max_size_detached": "850 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required for long-term rentals", "parking": "1 space per unit", "rear_setback": "4-15 ft (varies by zone: 4 ft in R-5; 15 ft in R-4/R-4A)", "side_setback": "4-7 ft (varies by zone: 4 ft in R-5; 7 ft in R-4/R-4A)" } }, { "adu_friendly_score": 5, "average_build_cost": "$130,000-$260,000", "average_rent_1br": "$1,300-$1,800/mo", "average_rent_2br": "$1,700-$2,400/mo", "city": "Savannah", "cost_per_sqft": "$175-$345", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "$1,000-$1,800", "last_updated": "2026-06-07", "permit_fees": "$2,800-$4,500", "permit_timeline": "75-120 days", "population": "149,245", "pre_approved_plans": "Not available", "prefab_adu_cost": "$100,000-$220,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Permitted with license", "slug": "savannah-ga", "source_count": 5, "state": "Georgia", "state_abbrev": "GA", "url": "https://www.aduzoning.org/adu-rules/savannah-ga/", "zoning": { "allowed_zones": "Select residential zones (non-historic)", "front_setback": "25 feet", "max_height": "30 feet", "max_size_attached": "600 sq ft", "max_size_detached": "800 sq ft or 40% of principal dwelling (whichever is less)", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,500 sq ft", "owner_occupancy": "Often required", "parking": "1 space per unit", "rear_setback": "20 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$150,000-$300,000", "average_rent_1br": "$1,600-$2,200", "average_rent_2br": "$2,200-$3,000", "city": "Honolulu", "cost_per_sqft": "$250-$400", "garage_conversion_cost": "$120,000-$200,000", "impact_fees": "Utility connection fees substantial; electrical panel upgrades $5,000-$15,000", "last_updated": "2026-06-07", "permit_fees": "$3,000-$8,000 estimated (higher utilities/inspection costs)", "permit_timeline": "90-120 days typical (longer than mainland due to complexity)", "population": "337,256", "pre_approved_plans": "Limited pre-approved designs; custom plans more common", "prefab_adu_cost": "$100,000-$150,000", "roi_estimate": "10-15 year payback due to high construction costs; strong rental income", "short_term_rental_allowed": "Minimum 6-month lease; short-term discouraged to preserve neighborhood", "slug": "honolulu-hi", "source_count": 2, "state": "Hawaii", "state_abbrev": "HI", "url": "https://www.aduzoning.org/adu-rules/honolulu-hi/", "zoning": { "allowed_zones": "R-3.5, R-5, R-7.5, R-10, R-20; Country Districts (AG-1, AG-2)", "front_setback": "Standard building code requirements", "max_height": "Not specified; standard building codes apply", "max_size_attached": "Same size limits as detached", "max_size_detached": "400 sq ft (3,500-4,999 sf lot); 800 sq ft (5,000+ sf lot)", "max_size_jadu": "N/A (Hawaii calls these Ohana units)", "max_units": "1 ADU + 1 Ohana unit possible on larger lots (7,500+ sf); Ordinance 25-2 allows 2 units on all lots", "minimum_lot_size": "3,500 sq ft minimum for ADU; varies for Ohana units", "owner_occupancy": "Required - owner or family member must live on property (either main or ADU)", "parking": "1 space minimum (2 for Ohana units); exempt if within 1/2 mile rail transit", "rear_setback": "Standard building code requirements", "side_setback": "Standard building code requirements" } }, { "adu_friendly_score": 7, "average_build_cost": "$150,000-$300,000", "average_rent_1br": "$1,450-$1,950/mo", "average_rent_2br": "$1,850-$2,600/mo", "city": "Chicago", "cost_per_sqft": "$160-$315", "garage_conversion_cost": "$80,000-$180,000", "impact_fees": "$1,000-$1,800", "last_updated": "2026-06-07", "permit_fees": "$2,800-$4,500", "permit_timeline": "60-90 days", "population": "2,746,388", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$110,000-$250,000", "roi_estimate": "5-7% annual return", "short_term_rental_allowed": "Not typically permitted", "slug": "chicago-il", "source_count": 7, "state": "Illinois", "state_abbrev": "IL", "url": "https://www.aduzoning.org/adu-rules/chicago-il/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "20 feet", "max_height": "22 ft (coach houses)", "max_size_attached": "800 sq ft", "max_size_detached": "700 sq ft (current pilot; new ordinance April 2026 removes size cap)", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "4,500 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "15 feet", "side_setback": "3 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,500-$2,000/mo", "average_rent_2br": "$1,900-$2,700/mo", "city": "Evanston", "cost_per_sqft": "$155-$310", "garage_conversion_cost": "$75,000-$170,000", "impact_fees": "$800-$1,400", "last_updated": "2026-06-07", "permit_fees": "$2,500-$4,000", "permit_timeline": "50-70 days", "population": "80,617", "pre_approved_plans": "Available for select types", "prefab_adu_cost": "$105,000-$235,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Limited", "slug": "evanston-il", "source_count": 5, "state": "Illinois", "state_abbrev": "IL", "url": "https://www.aduzoning.org/adu-rules/evanston-il/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "15 feet", "max_height": "28 ft (sloped roofs); 20 ft (flat/mansard roofs)", "max_size_attached": "800 sq ft", "max_size_detached": "1,000 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "4,000 sq ft", "owner_occupancy": "Not required", "parking": "No additional parking required", "rear_setback": "12 feet", "side_setback": "3 feet" } }, { "adu_friendly_score": 6, "average_build_cost": "$200,000-$400,000", "average_rent_1br": "$1,800-$2,400/mo", "average_rent_2br": "$2,200-$3,200/mo", "city": "Boston", "cost_per_sqft": "$220-$440", "garage_conversion_cost": "$100,000-$220,000", "impact_fees": "$2,000-$3,500", "last_updated": "2026-06-07", "permit_fees": "$4,500-$7,500", "permit_timeline": "90-150 days", "population": "692,600", "pre_approved_plans": "Not available", "prefab_adu_cost": "$150,000-$320,000", "roi_estimate": "5-7% annual return", "short_term_rental_allowed": "Not permitted", "slug": "boston-ma", "source_count": 10, "state": "Massachusetts", "state_abbrev": "MA", "url": "https://www.aduzoning.org/adu-rules/boston-ma/", "zoning": { "allowed_zones": "Select residential zones", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "900 sq ft or 50% of living area (whichever is less)", "max_size_detached": "900 sq ft or 50% of living area (whichever is less)", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "May be required in some zones", "parking": "1 space per unit", "rear_setback": "20 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$210,000-$420,000", "average_rent_1br": "$1,900-$2,500/mo", "average_rent_2br": "$2,300-$3,400/mo", "city": "Cambridge", "cost_per_sqft": "$220-$440", "garage_conversion_cost": "$105,000-$230,000", "impact_fees": "$1,500-$2,500", "last_updated": "2026-06-07", "permit_fees": "$3,500-$5,500", "permit_timeline": "60-90 days", "population": "118,403", "pre_approved_plans": "Not available", "prefab_adu_cost": "$160,000-$340,000", "roi_estimate": "5-7% annual return", "short_term_rental_allowed": "Not permitted", "slug": "cambridge-ma", "source_count": 6, "state": "Massachusetts", "state_abbrev": "MA", "url": "https://www.aduzoning.org/adu-rules/cambridge-ma/", "zoning": { "allowed_zones": "Residential zones R-1 through R-4", "front_setback": "15 feet", "max_height": "35 feet", "max_size_attached": "850 sq ft", "max_size_detached": "950 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "4,500 sq ft", "owner_occupancy": "Not required", "parking": "Optional", "rear_setback": "15 feet", "side_setback": "3 feet" } }, { "adu_friendly_score": 6, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,250-$1,650/mo", "average_rent_2br": "$1,550-$2,150/mo", "city": "Worcester", "cost_per_sqft": "$165-$330", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "$1,000-$1,800", "last_updated": "2026-06-07", "permit_fees": "$2,800-$4,500", "permit_timeline": "60-80 days", "population": "206,518", "pre_approved_plans": "Not available", "prefab_adu_cost": "$110,000-$250,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Not permitted", "slug": "worcester-ma", "source_count": 6, "state": "Massachusetts", "state_abbrev": "MA", "url": "https://www.aduzoning.org/adu-rules/worcester-ma/", "zoning": { "allowed_zones": "Residential zones A and B", "front_setback": "20 feet", "max_height": "30 feet", "max_size_attached": "900 sq ft", "max_size_detached": "850 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required (MA Affordable Homes Act, effective Jan 31, 2025 prohibits this)", "parking": "1 space per unit", "rear_setback": "20 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 9, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,350-$1,800/mo", "average_rent_2br": "$1,700-$2,400/mo", "city": "Minneapolis", "cost_per_sqft": "$130-$270", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "Minimal", "last_updated": "2026-06-07", "permit_fees": "$1,800-$3,000", "permit_timeline": "40-60 days", "population": "429,954", "pre_approved_plans": "Available", "prefab_adu_cost": "$100,000-$230,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Permitted with registration", "slug": "minneapolis-mn", "source_count": 10, "state": "Minnesota", "state_abbrev": "MN", "url": "https://www.aduzoning.org/adu-rules/minneapolis-mn/", "zoning": { "allowed_zones": "All interior residential districts permitting single- or two-family dwellings", "front_setback": "Must meet primary dwelling front setback (ADUs placed in rear yard)", "max_height": "16 ft (20-21 ft if exterior materials match principal structure)", "max_size_attached": "800 sq ft", "max_size_detached": "1,300 sq ft or 16% of lot area (whichever greater); max 1,600 sq ft or size of primary dwelling (whichever less)", "max_size_jadu": "800 sq ft (internal ADU \u2014 within existing structure)", "max_units": "1 ADU per zoning lot", "minimum_lot_size": "No ADU-specific minimum; lot must support permitted single- or two-family dwelling", "owner_occupancy": "Not required (removed by ordinance amendment, effective 2020; applies to both principal and ADU)", "parking": "No minimum off-street parking required", "rear_setback": "3 ft (5 ft from alleys for above-garage ADUs)", "side_setback": "3 ft" } }, { "adu_friendly_score": 8, "average_build_cost": "$135,000-$270,000", "average_rent_1br": "$1,300-$1,750/mo", "average_rent_2br": "$1,650-$2,300/mo", "city": "Saint Paul", "cost_per_sqft": "$130-$270", "garage_conversion_cost": "$65,000-$155,000", "impact_fees": "$400-$800", "last_updated": "2026-06-07", "permit_fees": "$1,900-$3,200", "permit_timeline": "45-65 days", "population": "311,769", "pre_approved_plans": "Available", "prefab_adu_cost": "$95,000-$220,000", "roi_estimate": "7-9% annual return", "short_term_rental_allowed": "Permitted with license", "slug": "saint-paul-mn", "source_count": 8, "state": "Minnesota", "state_abbrev": "MN", "url": "https://www.aduzoning.org/adu-rules/saint-paul-mn/", "zoning": { "allowed_zones": "All residential zones with one-family dwellings (citywide since 2018)", "front_setback": "Must meet principal building front setback (ADUs placed in rear)", "max_height": "25 ft or height of principal structure (whichever less) for detached; district standard for attached", "max_size_attached": "800 sq ft or 75% of principal dwelling floor area (whichever greater)", "max_size_detached": "800 sq ft or 75% of principal dwelling floor area (whichever greater)", "max_size_jadu": "800 sq ft or 75% of principal dwelling (internal ADU)", "max_units": "2 ADUs per one-family dwelling (at least 1 must be detached if both built)", "minimum_lot_size": "No minimum (lot size requirement removed in 2022)", "owner_occupancy": "Not required (removed in 2022)", "parking": "No additional parking required", "rear_setback": "3 ft from interior lot lines", "side_setback": "3 ft from interior lot lines" } }, { "adu_friendly_score": 3, "average_build_cost": "$130,000-$250,000", "average_rent_1br": "$1,300-$1,650/mo", "average_rent_2br": "$1,550-$1,900/mo", "city": "Henderson", "cost_per_sqft": "$140-$280", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "Confirm with Henderson Development Services Center", "last_updated": "2026-06-10", "permit_fees": "Confirm with Henderson Development Services Center", "permit_timeline": "Confirm with Henderson Development Services Center", "population": "350,020", "pre_approved_plans": "No city pre-approved ADU plan program identified as of June 2026", "prefab_adu_cost": "$90,000-$200,000", "roi_estimate": "5-8% annual return", "short_term_rental_allowed": "No \u2014 accessory dwelling rental agreements must exceed 30 days (per Review-Journal reporting); Henderson's separate short-term rental licensing rules apply to other property types", "slug": "henderson-nv", "source_count": 8, "state": "Nevada", "state_abbrev": "NV", "url": "https://www.aduzoning.org/adu-rules/henderson-nv/", "zoning": { "allowed_zones": "Conditional use in four low-density single-family residential zones (Henderson Development Code Title 19, Sec. 19.9.3 Accessory Uses); in RS-6 a minimum 10,000 sq ft lot is required", "front_setback": "Per underlying zoning district \u2014 confirm with Henderson Community Development", "max_height": "Confirm with Henderson Community Development (Development Code 19.9.3)", "max_size_attached": "Subject to the same 25% / 1,000 sq ft framework \u2014 confirm with Henderson Community Development", "max_size_detached": "25% of the main single-family home's square footage (excluding carports, garages, unfinished basements), max 1,000 sq ft per Review-Journal reporting; some 2026 secondary sources cite a 1,200 sq ft cap \u2014 confirm the current limit with Henderson Community Development", "max_size_jadu": "Not a defined category in Henderson; internal ADUs follow standard accessory dwelling rules", "max_units": "1 accessory dwelling per property", "minimum_lot_size": "10,000 sq ft in RS-6; other eligible low-density zones generally have 10,000+ sq ft minimum lots", "owner_occupancy": "Not required \u2014 Henderson is the Vegas-area exception; occupancy is instead limited to no more than 4 unrelated persons per dwelling", "parking": "1 additional off-street space typically cited; Nevada AB 396 (2025) bars local ordinances from requiring more than 1 ADU space \u2014 confirm current standard with Henderson", "rear_setback": "Per underlying zoning district; minimum 6-ft separation from the main residence required \u2014 confirm exact district setbacks with Henderson Community Development", "side_setback": "Per underlying zoning district \u2014 confirm with Henderson Community Development" } }, { "adu_friendly_score": 4, "average_build_cost": "$130,000-$250,000", "average_rent_1br": "$1,150-$1,450/mo", "average_rent_2br": "$1,400-$1,750/mo", "city": "Las Vegas", "cost_per_sqft": "$140-$280", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "Confirm with City of Las Vegas Building & Safety", "last_updated": "2026-06-10", "permit_fees": "Special Use Permit reported at $1,030 ($500 application + $500 notification + $30 recording, per Las Vegas Review-Journal) plus valuation-based building permit fees \u2014 confirm current fee schedule with the city", "permit_timeline": "Confirm with Las Vegas Planning Department \u2014 the SUP hearing process adds months versus over-the-counter permits", "population": "660,400", "pre_approved_plans": "No city pre-approved ADU plan program identified as of June 2026", "prefab_adu_cost": "$90,000-$200,000", "roi_estimate": "5-8% annual return", "short_term_rental_allowed": "No \u2014 accessory dwelling rental agreements must exceed 30 days (per Review-Journal reporting on area jurisdictions), and the city's separate short-term rental licensing regime applies", "slug": "las-vegas-nv", "source_count": 8, "state": "Nevada", "state_abbrev": "NV", "url": "https://www.aduzoning.org/adu-rules/las-vegas-nv/", "zoning": { "allowed_zones": "U (Undeveloped), R-A (Ranch Acres), R-E (Residence Estates), R-D (Single Family Residential-Restricted), and R-1 (Single Family Residential) \u2014 Special Use Permit required in each (Title 19.12, Accessory Structure Class I)", "front_setback": "Detached accessory structures are not permitted in front of the primary structure", "max_height": "2 stories / 35 ft maximum, or the height of the main building, whichever is less (19.08.040)", "max_size_attached": "Counts toward the same 50%-of-principal-dwelling accessory structure limit (19.08.040)", "max_size_detached": "No separate ADU cap; total floor area of ALL accessory structures limited to 50% of the principal dwelling's floor area, and ground floors of accessory buildings may not cover more than 50% of the rear yard (19.08.040)", "max_size_jadu": "Not a defined category in Las Vegas; interior conversions with kitchens fall under Accessory Structure Class I rules", "max_units": "1 accessory dwelling per property", "minimum_lot_size": "Lot must exceed 6,500 sq ft (Special Use Permit minimum requirement)", "owner_occupancy": "Required to rent: unless the principal dwelling is owner-occupied, a Class I accessory structure may not be offered or occupied as a rental unit", "parking": "1 additional on-site parking space required beyond the normal requirement (Title 19.12 Class I standards)", "rear_setback": "3 feet minimum for detached accessory structures, plus 6-ft separation from the main dwelling; no setback required from a property line abutting an alley", "side_setback": "3 feet minimum, plus 6-ft separation from the main dwelling; corner lots must match the main dwelling's street-side setback" } }, { "adu_friendly_score": 6, "average_build_cost": "$110,000-$220,000", "average_rent_1br": "$1,100-$1,500/mo", "average_rent_2br": "$1,400-$1,900/mo", "city": "Buffalo", "cost_per_sqft": "$120-$250", "garage_conversion_cost": "$55,000-$130,000", "impact_fees": "$500-$1,000", "last_updated": "2026-06-07", "permit_fees": "$2,000-$3,500", "permit_timeline": "50-70 days", "population": "255,284", "pre_approved_plans": "Available for select types", "prefab_adu_cost": "$80,000-$180,000", "roi_estimate": "8-12% annual return", "short_term_rental_allowed": "Limited", "slug": "buffalo-ny", "source_count": 7, "state": "New York", "state_abbrev": "NY", "url": "https://www.aduzoning.org/adu-rules/buffalo-ny/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "20 feet", "max_height": "30 feet", "max_size_attached": "800 sq ft", "max_size_detached": "900 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "4,500 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 5, "average_build_cost": "$150,000-$300,000", "average_rent_1br": "$2,200-$3,200/mo", "average_rent_2br": "$2,800-$4,200/mo", "city": "New York City", "cost_per_sqft": "$300-$600", "garage_conversion_cost": "$120,000-$260,000", "impact_fees": "Varies by borough", "last_updated": "2026-06-10", "permit_fees": "$5,000-$10,000", "permit_timeline": "120-180 days", "population": "8,335,897", "pre_approved_plans": "Yes \u2014 DOB/HPD Pre-Approved ADU Plan Library launched with 11 designs (growing); pre-reviewed for code compliance for faster approval", "prefab_adu_cost": "$0-$0", "roi_estimate": "4-6% annual return", "short_term_rental_allowed": "Heavily restricted (primary unit rule)", "slug": "new-york-city-ny", "source_count": 10, "state": "New York", "state_abbrev": "NY", "url": "https://www.aduzoning.org/adu-rules/new-york-city-ny/", "zoning": { "allowed_zones": "R1-R5 residential zones (NOT R1A, R2A, R3A unless in Greater Transit Zone)", "front_setback": "N/A", "max_height": "15 ft (detached, zero lot line, or semi-detached ADUs)", "max_size_attached": "800 sq ft", "max_size_detached": "Not allowed (dense urban)", "max_size_jadu": "Not allowed", "max_units": "1 accessory apartment per lot", "minimum_lot_size": "N/A", "owner_occupancy": "Owner must occupy primary unit", "parking": "Not required", "rear_setback": "N/A", "side_setback": "N/A" } }, { "adu_friendly_score": 6, "average_build_cost": "$105,000-$210,000", "average_rent_1br": "$1,050-$1,450/mo", "average_rent_2br": "$1,350-$1,850/mo", "city": "Rochester", "cost_per_sqft": "$125-$250", "garage_conversion_cost": "$50,000-$120,000", "impact_fees": "$400-$900", "last_updated": "2026-06-07", "permit_fees": "$1,900-$3,300", "permit_timeline": "50-70 days", "population": "211,328", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$75,000-$170,000", "roi_estimate": "8-12% annual return", "short_term_rental_allowed": "Not typically permitted", "slug": "rochester-ny", "source_count": 6, "state": "New York", "state_abbrev": "NY", "url": "https://www.aduzoning.org/adu-rules/rochester-ny/", "zoning": { "allowed_zones": "Single-family residential", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "750 sq ft", "max_size_detached": "850 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "4,500 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$115,000-$230,000", "average_rent_1br": "$1,250-$1,700/mo", "average_rent_2br": "$1,600-$2,200/mo", "city": "Charlotte", "cost_per_sqft": "$135-$270", "garage_conversion_cost": "$55,000-$130,000", "impact_fees": "$800-$1,400", "last_updated": "2026-06-07", "permit_fees": "$2,200-$3,800", "permit_timeline": "50-75 days", "population": "885,708", "pre_approved_plans": "Available for select types", "prefab_adu_cost": "$80,000-$180,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Varies by neighborhood", "slug": "charlotte-nc", "source_count": 5, "state": "North Carolina", "state_abbrev": "NC", "url": "https://www.aduzoning.org/adu-rules/charlotte-nc/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "800 sq ft", "max_size_detached": "1,000 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$120,000-$240,000", "average_rent_1br": "$1,300-$1,750/mo", "average_rent_2br": "$1,650-$2,300/mo", "city": "Durham", "cost_per_sqft": "$140-$280", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "$800-$1,500", "last_updated": "2026-06-07", "permit_fees": "$2,300-$3,900", "permit_timeline": "55-75 days", "population": "283,506", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$85,000-$190,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Varies by zone", "slug": "durham-nc", "source_count": 6, "state": "North Carolina", "state_abbrev": "NC", "url": "https://www.aduzoning.org/adu-rules/durham-nc/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "20 feet", "max_height": "20 ft (detached, outside setbacks); 15 ft (within setbacks)", "max_size_attached": "750 sq ft", "max_size_detached": "850 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$110,000-$220,000", "average_rent_1br": "$1,200-$1,650/mo", "average_rent_2br": "$1,550-$2,150/mo", "city": "Raleigh", "cost_per_sqft": "$135-$275", "garage_conversion_cost": "$55,000-$130,000", "impact_fees": "$700-$1,300", "last_updated": "2026-06-07", "permit_fees": "$2,100-$3,600", "permit_timeline": "50-70 days", "population": "467,665", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$80,000-$180,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Not typically permitted", "slug": "raleigh-nc", "source_count": 6, "state": "North Carolina", "state_abbrev": "NC", "url": "https://www.aduzoning.org/adu-rules/raleigh-nc/", "zoning": { "allowed_zones": "Single-family residential", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "700 sq ft", "max_size_detached": "800 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required", "parking": "No additional parking required", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,300-$1,800/mo", "average_rent_2br": "$1,700-$2,500/mo", "city": "Bend", "cost_per_sqft": "$140-$280", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "$400-$800", "last_updated": "2026-06-07", "permit_fees": "$1,700-$2,900", "permit_timeline": "40-55 days", "population": "100,399", "pre_approved_plans": "Available", "prefab_adu_cost": "$100,000-$230,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Yes (vacation rental restrictions apply)", "slug": "bend-or", "source_count": 7, "state": "Oregon", "state_abbrev": "OR", "url": "https://www.aduzoning.org/adu-rules/bend-or/", "zoning": { "allowed_zones": "All residential zones", "front_setback": "5 feet", "max_height": "35 feet", "max_size_attached": "800 sq ft", "max_size_detached": "800 sq ft (first ADU); 500 sq ft (second ADU)", "max_size_jadu": "No limit (conversion only)", "max_units": "1 ADU per lot", "minimum_lot_size": "4,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space (optional)", "rear_setback": "10 feet", "side_setback": "0 feet (easement)" } }, { "adu_friendly_score": 8, "average_build_cost": "$140,000-$280,000", "average_rent_1br": "$1,200-$1,700/mo", "average_rent_2br": "$1,600-$2,400/mo", "city": "Eugene", "cost_per_sqft": "$130-$260", "garage_conversion_cost": "$65,000-$155,000", "impact_fees": "Minimal", "last_updated": "2026-06-07", "permit_fees": "$1,600-$2,700", "permit_timeline": "35-50 days", "population": "176,654", "pre_approved_plans": "Available", "prefab_adu_cost": "$95,000-$220,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Yes, permitted", "slug": "eugene-or", "source_count": 6, "state": "Oregon", "state_abbrev": "OR", "url": "https://www.aduzoning.org/adu-rules/eugene-or/", "zoning": { "allowed_zones": "All residential zones", "front_setback": "0 feet (alley)", "max_height": "35 feet", "max_size_attached": "900 sq ft", "max_size_detached": "1,100 sq ft", "max_size_jadu": "750 sq ft", "max_units": "1 main ADU + 1 JADU per lot", "minimum_lot_size": "4,000 sq ft", "owner_occupancy": "Not required", "parking": "Optional", "rear_setback": "10 feet", "side_setback": "0 feet (easement)" } }, { "adu_friendly_score": 9, "average_build_cost": "$150,000-$300,000", "average_rent_1br": "$1,400-$1,900/mo", "average_rent_2br": "$1,800-$2,600/mo", "city": "Portland", "cost_per_sqft": "$125-$250", "garage_conversion_cost": "$70,000-$160,000", "impact_fees": "Minimal", "last_updated": "2026-06-07", "permit_fees": "$1,500-$2,500", "permit_timeline": "30-45 days", "population": "652,503", "pre_approved_plans": "Extensive pre-approved library available", "prefab_adu_cost": "$100,000-$240,000", "roi_estimate": "6-9% annual return", "short_term_rental_allowed": "Yes, with registration", "slug": "portland-or", "source_count": 9, "state": "Oregon", "state_abbrev": "OR", "url": "https://www.aduzoning.org/adu-rules/portland-or/", "zoning": { "allowed_zones": "All residential zones", "front_setback": "0 feet (alley lot)", "max_height": "20 ft (outside setbacks); 15 ft (within setbacks)", "max_size_attached": "1,000 sq ft", "max_size_detached": "800 sq ft or 75% of primary (whichever is less)", "max_size_jadu": "800 sq ft", "max_units": "2 ADUs per lot (1 detached + 1 attached)", "minimum_lot_size": "3,500 sq ft", "owner_occupancy": "Not required", "parking": "Optional", "rear_setback": "5 feet", "side_setback": "0 feet with easement" } }, { "adu_friendly_score": 7, "average_build_cost": "$130,000-$260,000", "average_rent_1br": "$1,100-$1,550/mo", "average_rent_2br": "$1,400-$2,000/mo", "city": "Salem", "cost_per_sqft": "$125-$250", "garage_conversion_cost": "$60,000-$150,000", "impact_fees": "Minimal ($200-$400)", "last_updated": "2026-06-07", "permit_fees": "$1,800-$3,000", "permit_timeline": "45-65 days", "population": "175,535", "pre_approved_plans": "Available for detached ADUs", "prefab_adu_cost": "$90,000-$210,000", "roi_estimate": "7-9% annual return", "short_term_rental_allowed": "Permitted with license", "slug": "salem-or", "source_count": 6, "state": "Oregon", "state_abbrev": "OR", "url": "https://www.aduzoning.org/adu-rules/salem-or/", "zoning": { "allowed_zones": "Residential single-family zones", "front_setback": "15 feet", "max_height": "35 feet", "max_size_attached": "850 sq ft", "max_size_detached": "1,050 sq ft", "max_size_jadu": "700 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "4,500 sq ft", "owner_occupancy": "Not required", "parking": "1 space (optional)", "rear_setback": "12 feet", "side_setback": "3 feet" } }, { "adu_friendly_score": 5, "average_build_cost": "$200,000-$325,000", "average_rent_1br": "$900-$1,300", "average_rent_2br": "$1,100-$1,600", "city": "Pittsburgh", "cost_per_sqft": "$225-$375", "garage_conversion_cost": "$90,000-$150,000", "impact_fees": "Local impact fees vary; no ADU-specific waivers", "last_updated": "2026-06-07", "permit_fees": "$1,350+ for building permits (variable by jurisdiction)", "permit_timeline": "90-180 days if approved; varies dramatically", "population": "305,704", "pre_approved_plans": "Not available; custom designs required", "prefab_adu_cost": "$80,000-$140,000", "roi_estimate": "12-18 year payback due to low rents; investor caution advised", "short_term_rental_allowed": "Limited market for short-term; long-term preferred", "slug": "pittsburgh-pa", "source_count": 2, "state": "Pennsylvania", "state_abbrev": "PA", "url": "https://www.aduzoning.org/adu-rules/pittsburgh-pa/", "zoning": { "allowed_zones": "No city-wide permission; only Garfield ADU Overlay District (pilot, expired)", "front_setback": "Varies by zone", "max_height": "Subject to zoning code; typically 35 ft residential", "max_size_attached": "Not permitted currently", "max_size_detached": "1200 sq ft (proposed; not yet adopted)", "max_size_jadu": "N/A", "max_units": "Proposed: up to 2 ADUs per zoning lot (not yet approved)", "minimum_lot_size": "Varies by zone; no ADU-specific minimum", "owner_occupancy": "Not mandated (but proposed in new legislation)", "parking": "Typically 1-2 spaces required", "rear_setback": "Varies by zone; typically 20-30 ft", "side_setback": "Varies by zone; typically 10-15 ft" } }, { "adu_friendly_score": 7, "average_build_cost": "$150,000-$250,000", "average_rent_1br": "$1,200-$1,700", "average_rent_2br": "$1,600-$2,200", "city": "Nashville", "cost_per_sqft": "$225-$350", "garage_conversion_cost": "$100,000-$180,000", "impact_fees": "School impact fees may apply", "last_updated": "2026-06-07", "permit_fees": "$2,500-$5,000 estimated (permit fees + covenant recording)", "permit_timeline": "60-90 days typical; longer for Historic Overlay reviews", "population": "712,581", "pre_approved_plans": "City has DADU design standards and guidelines", "prefab_adu_cost": "$80,000-$140,000", "roi_estimate": "7-10 year payback; $100K+ supplemental income over 5 years", "short_term_rental_allowed": "Restricted under restrictive covenants; long-term only", "slug": "nashville-tn", "source_count": 2, "state": "Tennessee", "state_abbrev": "TN", "url": "https://www.aduzoning.org/adu-rules/nashville-tn/", "zoning": { "allowed_zones": "RS (single-family) with DADU overlay; R or RM zones with alley access or UDO; Urban Services District; General Services District with DADU overlay", "front_setback": "10 ft minimum separation from primary dwelling (alley edge consideration)", "max_height": "Must be subordinate to primary dwelling; typically 1-2 stories", "max_size_attached": "Limited; must be subordinate to primary dwelling", "max_size_detached": "1200 sq ft (but must not exceed footprint of primary structure)", "max_size_jadu": "N/A (Nashville uses DADU terminology)", "max_units": "1 DADU per lot (with conditions)", "minimum_lot_size": "Varies by overlay district; typically 10,000 sq ft minimum for some areas", "owner_occupancy": "Required - owner must live in primary dwelling or DADU", "parking": "Typically included on-site", "rear_setback": "5 ft minimum", "side_setback": "5 ft minimum" } }, { "adu_friendly_score": 8, "average_build_cost": "$125,000-$250,000", "average_rent_1br": "$1,300-$1,900/mo", "average_rent_2br": "$1,700-$2,500/mo", "city": "Austin", "cost_per_sqft": "$165-$330", "garage_conversion_cost": "$60,000-$140,000", "impact_fees": "$1,200-$2,000", "last_updated": "2026-06-07", "permit_fees": "$2,500-$4,000", "permit_timeline": "45-60 days", "population": "978,908", "pre_approved_plans": "City offers expedited review for pre-approved plans", "prefab_adu_cost": "$85,000-$200,000", "roi_estimate": "7-10% annual return", "short_term_rental_allowed": "Check local restrictions", "slug": "austin-tx", "source_count": 8, "state": "Texas", "state_abbrev": "TX", "url": "https://www.aduzoning.org/adu-rules/austin-tx/", "zoning": { "allowed_zones": "SF3, SF2, SF1, MU, UR, etc.", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "1,350 sq ft or 0.15 FAR (whichever is smaller)", "max_size_detached": "1,350 sq ft or 0.15 FAR (whichever is smaller; updated by HOME Phase 2, May 2024)", "max_size_jadu": "500 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space for primary, optional for ADU", "rear_setback": "10 feet", "side_setback": "3 feet (with easement)" } }, { "adu_friendly_score": 6, "average_build_cost": "$115,000-$230,000", "average_rent_1br": "$1,150-$1,700/mo", "average_rent_2br": "$1,450-$2,200/mo", "city": "Dallas", "cost_per_sqft": "$130-$250", "garage_conversion_cost": "$55,000-$135,000", "impact_fees": "$900-$1,600", "last_updated": "2026-06-07", "permit_fees": "$2,200-$3,800", "permit_timeline": "50-75 days", "population": "1,343,573", "pre_approved_plans": "Available for detached ADUs", "prefab_adu_cost": "$80,000-$185,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Not permitted in most areas", "slug": "dallas-tx", "source_count": 7, "state": "Texas", "state_abbrev": "TX", "url": "https://www.aduzoning.org/adu-rules/dallas-tx/", "zoning": { "allowed_zones": "Single-family residential (SF)", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "700 sq ft", "max_size_detached": "900 sq ft", "max_size_jadu": "400 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "5,500 sq ft", "owner_occupancy": "Not required", "parking": "1 space per primary unit + 1 for ADU", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 6, "average_build_cost": "$120,000-$240,000", "average_rent_1br": "$1,100-$1,650/mo", "average_rent_2br": "$1,400-$2,100/mo", "city": "Fort Worth", "cost_per_sqft": "$120-$240", "garage_conversion_cost": "$55,000-$135,000", "impact_fees": "$1,000-$1,800", "last_updated": "2026-06-07", "permit_fees": "$2,400-$4,000", "permit_timeline": "45-65 days", "population": "909,585", "pre_approved_plans": "Limited program available", "prefab_adu_cost": "$85,000-$195,000", "roi_estimate": "6-9% annual return", "short_term_rental_allowed": "Restricted in most areas", "slug": "fort-worth-tx", "source_count": 6, "state": "Texas", "state_abbrev": "TX", "url": "https://www.aduzoning.org/adu-rules/fort-worth-tx/", "zoning": { "allowed_zones": "Single-family residential", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "750 sq ft", "max_size_detached": "1,000 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "6,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space for ADU", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 6, "average_build_cost": "$120,000-$240,000", "average_rent_1br": "$1,100-$1,600/mo", "average_rent_2br": "$1,400-$2,100/mo", "city": "Houston", "cost_per_sqft": "$100-$200", "garage_conversion_cost": "$50,000-$130,000", "impact_fees": "$800-$1,500", "last_updated": "2026-06-07", "permit_fees": "$3,000-$5,500", "permit_timeline": "60-90 days", "population": "2,304,580", "pre_approved_plans": "Limited pre-approval program", "prefab_adu_cost": "$80,000-$190,000", "roi_estimate": "6-9% annual return", "short_term_rental_allowed": "Varies by neighborhood", "slug": "houston-tx", "source_count": 6, "state": "Texas", "state_abbrev": "TX", "url": "https://www.aduzoning.org/adu-rules/houston-tx/", "zoning": { "allowed_zones": "SF, MF residential zones", "front_setback": "25 feet", "max_height": "35 feet", "max_size_attached": "800 sq ft", "max_size_detached": "1,200 sq ft", "max_size_jadu": "Not commonly allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "7,000 sq ft", "owner_occupancy": "Not required", "parking": "1 off-street parking space required for ADU (separate from primary dwelling's 2 spaces)", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 5, "average_build_cost": "$110,000-$220,000", "average_rent_1br": "$1,050-$1,550/mo", "average_rent_2br": "$1,300-$1,950/mo", "city": "San Antonio", "cost_per_sqft": "$140-$275", "garage_conversion_cost": "$50,000-$130,000", "impact_fees": "$1,200-$2,200", "last_updated": "2026-06-07", "permit_fees": "$4,000-$6,500", "permit_timeline": "90-120 days", "population": "1,547,253", "pre_approved_plans": "Not available", "prefab_adu_cost": "$75,000-$170,000", "roi_estimate": "5-7% annual return", "short_term_rental_allowed": "Not permitted", "slug": "san-antonio-tx", "source_count": 7, "state": "Texas", "state_abbrev": "TX", "url": "https://www.aduzoning.org/adu-rules/san-antonio-tx/", "zoning": { "allowed_zones": "Selected residential zones only", "front_setback": "25 feet", "max_height": "30 feet", "max_size_attached": "Not typically allowed", "max_size_detached": "800 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "7,500 sq ft", "owner_occupancy": "Not required", "parking": "2 spaces", "rear_setback": "20 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 8, "average_build_cost": "$180,000-$350,000", "average_rent_1br": "$1,200-$1,600", "average_rent_2br": "$1,600-$2,200", "city": "Salt Lake City", "cost_per_sqft": "$300-$350", "garage_conversion_cost": "$120,000-$200,000", "impact_fees": "Utility connection fees apply", "last_updated": "2026-06-07", "permit_fees": "$2,000-$4,000 estimated", "permit_timeline": "2-8 weeks for approval; 7-9 weeks for construction after permit issued; 3+ months total typical", "population": "208,007", "pre_approved_plans": "City offers ADU standard plans; ADU Handbook available", "prefab_adu_cost": "$100,000-$180,000", "roi_estimate": "8-12 year payback; property value increase 20-35%", "short_term_rental_allowed": "Restricted; long-term preferred", "slug": "salt-lake-city-ut", "source_count": 2, "state": "Utah", "state_abbrev": "UT", "url": "https://www.aduzoning.org/adu-rules/salt-lake-city-ut/", "zoning": { "allowed_zones": "All residential zones where residential uses permitted", "front_setback": "Comply with base zone", "max_height": "17 ft maximum (detached); can increase to 24 ft pitched or 20 ft flat with increased setbacks (+1 ft per additional foot over 17 ft)", "max_size_attached": "No maximum size for internal ADUs", "max_size_detached": "No maximum size; height-limited", "max_size_jadu": "N/A (Utah uses different classifications)", "max_units": "1 ADU per lot only", "minimum_lot_size": "No specific minimum", "owner_occupancy": "Required - owner must reside on property (either main or ADU)", "parking": "1 space minimum (in addition to primary dwelling requirement)", "rear_setback": "Increase 1 ft for each foot of height above 17 ft", "side_setback": "Increase 1 ft for each foot of height above 17 ft" } }, { "adu_friendly_score": 6, "average_build_cost": "$160,000-$320,000", "average_rent_1br": "$1,650-$2,150/mo", "average_rent_2br": "$2,050-$2,900/mo", "city": "Alexandria", "cost_per_sqft": "$180-$360", "garage_conversion_cost": "$85,000-$190,000", "impact_fees": "$1,200-$2,000", "last_updated": "2026-06-07", "permit_fees": "$3,200-$5,000", "permit_timeline": "70-100 days", "population": "159,428", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$125,000-$280,000", "roi_estimate": "5-7% annual return", "short_term_rental_allowed": "Not permitted", "slug": "alexandria-va", "source_count": 5, "state": "Virginia", "state_abbrev": "VA", "url": "https://www.aduzoning.org/adu-rules/alexandria-va/", "zoning": { "allowed_zones": "Single-family residential (non-historic)", "front_setback": "20 feet", "max_height": "20 ft (or height of main house, whichever is less)", "max_size_attached": "750 sq ft", "max_size_detached": "900 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "4,500 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "1 ft minimum; 3 ft if windows face property line", "side_setback": "1 ft minimum; 3 ft if windows face property line" } }, { "adu_friendly_score": 7, "average_build_cost": "$170,000-$340,000", "average_rent_1br": "$1,700-$2,200/mo", "average_rent_2br": "$2,100-$3,000/mo", "city": "Arlington", "cost_per_sqft": "$170-$340", "garage_conversion_cost": "$90,000-$200,000", "impact_fees": "$1,000-$1,800", "last_updated": "2026-06-07", "permit_fees": "$2,800-$4,500", "permit_timeline": "50-75 days", "population": "236,842", "pre_approved_plans": "Available", "prefab_adu_cost": "$130,000-$290,000", "roi_estimate": "5-7% annual return", "short_term_rental_allowed": "Not permitted", "slug": "arlington-va", "source_count": 5, "state": "Virginia", "state_abbrev": "VA", "url": "https://www.aduzoning.org/adu-rules/arlington-va/", "zoning": { "allowed_zones": "Single-family residential zones", "front_setback": "20 feet", "max_height": "25 ft for detached ADUs (updated 2026); 35 ft for primary structures", "max_size_attached": "850 sq ft", "max_size_detached": "1,000 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "4,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space per unit", "rear_setback": "5 ft (interior lots); 10 ft (corner lots)", "side_setback": "3 feet" } }, { "adu_friendly_score": 9, "average_build_cost": "$160,000-$320,000", "average_rent_1br": "$1,600-$2,100/mo", "average_rent_2br": "$2,000-$2,800/mo", "city": "Seattle", "cost_per_sqft": "$130-$270", "garage_conversion_cost": "$75,000-$170,000", "impact_fees": "Minimal", "last_updated": "2026-06-07", "permit_fees": "$1,800-$2,800", "permit_timeline": "30-45 days", "population": "753,675", "pre_approved_plans": "Extensive library available", "prefab_adu_cost": "$110,000-$260,000", "roi_estimate": "6-8% annual return", "short_term_rental_allowed": "Restricted (30 days minimum)", "slug": "seattle-wa", "source_count": 9, "state": "Washington", "state_abbrev": "WA", "url": "https://www.aduzoning.org/adu-rules/seattle-wa/", "zoning": { "allowed_zones": "All residential zones", "front_setback": "0 feet (alley lot)", "max_height": "40 feet", "max_size_attached": "1,000 sq ft", "max_size_detached": "1,200 sq ft", "max_size_jadu": "800 sq ft", "max_units": "3 units per lot possible (duplex + ADU)", "minimum_lot_size": "3,000 sq ft", "owner_occupancy": "Not required", "parking": "Optional", "rear_setback": "5 feet", "side_setback": "0 feet (easement)" } }, { "adu_friendly_score": 6, "average_build_cost": "$110,000-$220,000", "average_rent_1br": "$1,000-$1,450/mo", "average_rent_2br": "$1,300-$1,900/mo", "city": "Spokane", "cost_per_sqft": "$110-$220", "garage_conversion_cost": "$50,000-$120,000", "impact_fees": "$600-$1,200", "last_updated": "2026-06-07", "permit_fees": "$2,000-$3,500", "permit_timeline": "50-75 days", "population": "229,366", "pre_approved_plans": "Limited availability", "prefab_adu_cost": "$80,000-$180,000", "roi_estimate": "8-12% annual return", "short_term_rental_allowed": "Not permitted", "slug": "spokane-wa", "source_count": 6, "state": "Washington", "state_abbrev": "WA", "url": "https://www.aduzoning.org/adu-rules/spokane-wa/", "zoning": { "allowed_zones": "Single-family residential", "front_setback": "20 feet", "max_height": "35 feet", "max_size_attached": "800 sq ft", "max_size_detached": "1,000 sq ft", "max_size_jadu": "Not allowed", "max_units": "1 ADU per lot", "minimum_lot_size": "5,000 sq ft", "owner_occupancy": "Not required (WA state eliminated this requirement)", "parking": "1 space per unit", "rear_setback": "15 feet", "side_setback": "5 feet" } }, { "adu_friendly_score": 8, "average_build_cost": "$135,000-$270,000", "average_rent_1br": "$1,300-$1,750/mo", "average_rent_2br": "$1,650-$2,300/mo", "city": "Tacoma", "cost_per_sqft": "$125-$245", "garage_conversion_cost": "$65,000-$155,000", "impact_fees": "$500-$900", "last_updated": "2026-06-07", "permit_fees": "$1,800-$2,800", "permit_timeline": "40-60 days", "population": "219,346", "pre_approved_plans": "Available for common types", "prefab_adu_cost": "$100,000-$230,000", "roi_estimate": "7-9% annual return", "short_term_rental_allowed": "Restricted to primary residence owners", "slug": "tacoma-wa", "source_count": 7, "state": "Washington", "state_abbrev": "WA", "url": "https://www.aduzoning.org/adu-rules/tacoma-wa/", "zoning": { "allowed_zones": "Residential zones (most)", "front_setback": "15 feet", "max_height": "35 feet", "max_size_attached": "900 sq ft", "max_size_detached": "1,100 sq ft", "max_size_jadu": "750 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "3,500 sq ft", "owner_occupancy": "Not required", "parking": "Optional", "rear_setback": "10 feet", "side_setback": "3 feet" } }, { "adu_friendly_score": 7, "average_build_cost": "$135,000-$270,000", "average_rent_1br": "$1,250-$1,700/mo", "average_rent_2br": "$1,600-$2,300/mo", "city": "Vancouver", "cost_per_sqft": "$130-$260", "garage_conversion_cost": "$65,000-$155,000", "impact_fees": "$700-$1,300", "last_updated": "2026-06-07", "permit_fees": "$1,900-$3,200", "permit_timeline": "45-65 days", "population": "190,915", "pre_approved_plans": "Available", "prefab_adu_cost": "$95,000-$220,000", "roi_estimate": "7-9% annual return", "short_term_rental_allowed": "Permitted with license", "slug": "vancouver-wa", "source_count": 7, "state": "Washington", "state_abbrev": "WA", "url": "https://www.aduzoning.org/adu-rules/vancouver-wa/", "zoning": { "allowed_zones": "Residential single-family zones", "front_setback": "15 feet", "max_height": "35 feet", "max_size_attached": "850 sq ft", "max_size_detached": "1,050 sq ft", "max_size_jadu": "700 sq ft", "max_units": "1 ADU per lot", "minimum_lot_size": "4,000 sq ft", "owner_occupancy": "Not required", "parking": "1 space (optional)", "rear_setback": "10 feet", "side_setback": "3 feet" } } ], "city_count": 67, "description": "City-level ADU zoning, permit, cost, and rental income data compiled from municipal, state, and market sources.", "last_updated": "2026-06-10", "license": "CC-BY-4.0", "license_url": "https://creativecommons.org/licenses/by/4.0/", "name": "ADU Zoning Hub City Rules Dataset", "publisher": "ADU Zoning Hub", "publisher_url": "https://www.aduzoning.org", "state_count": 20 }