Compare ADU zoning rules across 36 California cities. Average ADU score: 7.2/10.
| City | Max Size | Setbacks | Permit Fees | Build Cost | 1BR Rent | Score |
|---|---|---|---|---|---|---|
| Anaheim | 1,200 sq ft headline cap, but expressly 'subject to 18.04.080.020', which caps the cumulative floor area of ALL enclosed detached accessory structures at the underlying zone's minimum livable floor area (1,700 sq ft in RH-1, RH-2, RH-3 and RS-1; 1,225 sq ft in RS-2, RS-3, RS-4) and further provides it 'shall not exceed the square footage of the main dwelling'. So on a modest primary home the detached ADU is limited to the size of that home. State law still guarantees at least 800 sq ft regardless. | 4 ft (unchanged, and correct — Anaheim adopts the state minimum verbatim in Table 38-A). Worth adding: conversions of legally permitted existing structures are exempt from structural setbacks entirely, and a legally established accessory structure may be demolished and rebuilt as an ADU in the same location and dimension without additional setbacks. Eaves/roof overhang must stay at least 12 inches from the property line. | $3,500-$12,000 | $130,000-$290,000 | $1,700-$2,300/mo | 7/10 |
| Berkeley | 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 | 4 ft minimum | $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) | $250,000-$500,000 | $2,300-$2,900/mo | 9/10 |
| Burbank | 850 sq ft (studio/1-bedroom); 1,000 sq ft (2+ bedrooms); 800 sq ft in Mountain Fire Zone or front-setback locations; +120 sq ft bonus for each extra code-compliant parking space (deed-restricted) | 4 ft | Plan check and permit fees due at submittal — confirm current schedule with Burbank Building & Safety, (818) 238-5250 | $220,000-$400,000 | $2,100-$2,400/mo | 6/10 |
| Carlsbad | 1,200 sq ft | 4 feet | Roughly $8-$15 per sq ft in combined permit/plan-check fees — Confirm with Carlsbad Building Division | $150,000-$350,000 | $2,500-$2,950/mo | 7/10 |
| Chula Vista | 1,200 sq ft | 4 ft minimum | Roughly $3-$5 per sq ft in permit/plan-check fees (local builder estimate); City Standard Plans save approximately $1,000 in plan review fees — confirm current schedule with Development Services | $300,000-$450,000 | $2,400-$2,900/mo | 8/10 |
| Corona | 1,200 sq ft (subject to zone lot-coverage limits, but an 800 sq ft/16-ft ADU can never be prohibited); conversions of existing space exempt | 4 ft maximum required, including lot lines adjacent to streets; none for conversions or same-footprint rebuilds | Plan check fees set by City Council resolution, paid at submittal — confirm current amounts with Corona Planning & Development, (951) 736-2262 | $160,000-$300,000 | $1,950-$2,250/mo | 6/10 |
| El Cajon | 1,200 sq ft of habitable space; ordinance also said the ADU may not exceed the primary dwelling's size — a provision HCD flagged as noncompliant, so confirm with Community Development | 4 ft minimum (3 ft allowed at 12 ft height; 5 ft required for 20 ft height) | Roughly $12-$14 per sq ft in permit costs (local builder estimate); total permitting typically $9,000-$20,000 — confirm current schedule with El Cajon Building & Fire Safety | $300,000-$450,000 | $1,800-$2,100/mo | 6/10 |
| Elk Grove | 1,200 sq ft | 4 ft for new construction; none for conversions or same-footprint rebuilds | Standard building permit and plan check fees — confirm current amounts with the Elk Grove Building Division | $150,000-$300,000 | $1,750-$2,050/mo | 8/10 |
| Escondido | 850 sq ft (studio/1BR) to 1,000 sq ft (2BR+) per city handout, based on lot FAR/coverage; some builder sources report 1,200 sq ft — confirm with Escondido Planning (760-839-4671) | 4 ft minimum | Building permit review fees collected; roughly $6-$8 per sq ft total permit costs (local builder estimate) — confirm with Escondido Building Division | $300,000-$425,000 | $1,900-$2,300/mo | 6/10 |
| Folsom | 850 sq ft (1 bedroom or fewer) or 1,000 sq ft (2+ bedrooms); an 800 sq ft ADU with 4-ft setbacks can never be precluded; minimum 150 sq ft | 4 ft; none for conversions of existing structures | Standard building permit and plan check fees; a planning application fee applies only if design review is required — confirm amounts with Folsom Community Development | $150,000-$300,000 | $1,900-$2,150/mo | 7/10 |
| Fontana | 1200 sq ft | 4 ft minimum (detached new construction) | Impact fees are waived 750 sq ft or less of interior livable space of interior livable space (Gov. Code 66311.5(c)(1)); building permit and plan check fees still apply — confirm the current amount with Fontana Building & Safety | $160,000-$270,000 | $1,300-$1,700 | 8/10 |
| Fremont | 1,200 sq ft | 4 ft for new construction; none for conversions of existing structures | Design review/building permit and inspection fees apply — confirm current amounts with Fremont Planning & Building Permit Services | $220,000-$420,000 | $2,150-$2,650/mo | 8/10 |
| Fresno | The greater of 1,400 sq ft or 50% of the average floor area of the primary unit(s). No separate detached cap. | The underlying base district's rear setback or 4 ft, whichever is LESS. Zero feet on lots abutting an alley (2 ft if the ADU's main entrance faces the alley). Where a recorded utility easement exists, the setback must include the easement. | City-published figures for a pre-approved-plan ADU: Plans FREE, Plan Check FREE, Building Permit 'Up to $2,400', School Impact Fee varies by sq ft (school fee is the district's, not the city's). Underlying Master Fee Schedule rates (fees effective 07/01/2025): R-3 One or Two-Family Production/Repeat/Standard Plan Infill = $34.89 plan check base + $1,279.35 inspection base at the 1,000 sq ft threshold. A custom-designed ADU instead uses R-3 (Custom): $580.69 plan check + $1,884.77 inspection at the same threshold. A CBSC surcharge of $1-$4 by valuation also applies. Do not publish a single range without splitting standard-plan vs custom. | $80,000-$200,000 | $1,000-$1,400/mo | 7/10 |
| Glendale | 850 sq ft for a 1-bedroom ADU; 1,000 sq ft for a 2-bedroom ADU, regardless of underlying zoning standards (units over 850 sq ft must add a second bedroom) | 4 ft maximum required for detached new-construction ADUs; none for conversions of existing structures | Approximately $6,000-$18,000 total (plan check, building permit, school fees, utility connections — builder estimates); Glendale Water & Power connection fees add roughly $2,000-$5,000 for new services. Confirm with the Building Division, (818) 548-3200 | $180,000-$400,000 | $2,000-$2,700/mo | 6/10 |
| Hayward | 1,200 sq ft maximum (850 sq ft studio/1BR and 1,000 sq ft 2+BR guaranteed; larger units capped at 50% of primary dwelling floor area or 1,200 sq ft, whichever is less) | 4 ft for new construction; none for conversions of existing permitted structures | $328 planning review fee + building permit fees (use the city's Permit Center Fee Estimator for totals) | $200,000-$400,000 | $1,850-$2,300/mo | 7/10 |
| Huntington Beach | Up to 1,200 sq ft; 800 sq ft unit must be allowed on virtually any lot (state law) | No more than 4 ft (state law); none for conversions of legally established existing space | Building permits roughly $2,000-$10,000 plus other city fees of $3,000-$11,000 depending on project size (secondary-source estimates); a 6% automation fee is added — confirm with the HB Permit Center fee schedule | $180,000-$420,000 | $2,400-$2,700/mo | 4/10 |
| Irvine | Up to 1,200 sq ft; 800 sq ft ADU must be allowed on virtually any lot. HCD struck Irvine's lot-size-based ADU size caps | 4 ft maximum required (state law); none for conversions of existing space | Deposit-based (Developer Deposit Case Set-Up) — confirm current amounts with Irvine Community Development, 949-724-6308. School fees apply to ADUs of 500 sq ft or more (School Fee Determination Form required) | $180,000-$420,000 | $2,700-$3,000/mo | 5/10 |
| Long Beach | 800 sq ft (detached new construction, single-family lot). STRICTER than the 850/1,000 sq ft floor in Gov. Code 66321(b)(2) — flag as arguably preempted, but this is the city's published operative limit. City's stated basis is Gov. Code 66323(a)(2)(A), the by-right pathway, which Long Beach administers because it has no local ADU ordinance. On multi-family lots the city imposes NO size limit on detached ADUs. | 4 ft for new construction — ADOPTS the state minimum on its face, but with a Long Beach measurement rule that is effectively MORE GENEROUS: 'The rear setback shall be measured to centerline of adjacent alley where such exists.' On Long Beach's many alley-served lots this lets the structure sit substantially closer to the rear property line than a naive 4 ft reading suggests. Conversions maintain the existing setback, subject to fire and life safety. | Replace the guessed range with the city's published figures. Long Beach's own guidance: 'For most construction projects, you could expect to spend about 2% of your building costs on plan checks, permits, inspections and other agency fees.' Published components (Building Permit & Plan Check Fees, effective 5/20/2026): Building Permit fee by valuation — $1,264 for the first $100,000 plus $6 per additional $1,000 in the $100,001-$1,000,000 band; Combination Building Permit (Group R-3, includes electrical, plumbing, mechanical) = 150% of the Building Permit fee, minimum $164; Combination Plan Check = 85% of the Building Permit fee, minimum $154; Zoning Plan Check = 0.5% of project valuation for valuations up to $750,000, minimum $310, capped at 95% of the building standard plan check fee; NPDES permit = $2 per $1,000 of valuation with plan check at 75% of that; Expedited plan check = 2x standard. Add a $115.00 processing fee to EACH plan check and permit application, plus a 6% Technology Surcharge and a 6% General Plan Surcharge on all applicable fees. Worked from those published formulas, a $150,000-valuation ADU lands near $5,800 in permit and plan-check fees before impact fees — I am labelling that figure as DERIVED from the published schedule, not published by the city. | $120,000-$280,000 | $1,500-$2,100/mo | 8/10 |
| Los Angeles | 1,200 sq ft | 4 ft for units ≤16 ft height | $4,000-$15,000 depending on size and type (plus 10% General Plan Maintenance Surcharge on permit fees as of June 9, 2026) | $150,000-$350,000 | $1,800-$2,500/mo | 9/10 |
| Oakland | 850 sq ft for a studio or 1-bedroom; 1,000 sq ft for 2 bedrooms or more (detached Category 2 ADU). The 1,200 sq ft figure does NOT apply to detached units - it is only the cap on the 50%-of-primary-dwelling option for ATTACHED ADUs and on Category 1 conversions. Our current value overstates the detached allowance by 200-350 sq ft. | 4 ft, OR the underlying zone's regularly required rear setback if that is less - but never less than 3 ft from the rear lot line. So Oakland can go tighter than the state's 4 ft floor where the base zone permits. Note that the separate lot-coverage/FAR protection clause is expressed at 'at least 4 foot side and rear yard setbacks', so an ADU relying on that protection should plan on 4 ft. Category 1 conversions/JADUs: no ADU setback applies (existing nonconforming envelopes are allowed). | Published Oakland figures, not a guess. PLANNING/ZONING PERMIT (Design Review Exemption - Secondary Units/ADU), FY2025-26 grand totals including the 7.2% General Plan Update and 12.70% Technology/Records surcharges: Category I, II & III $593.95 (base report fee $491.62); Category IV $892.54 (base $738.77); Amnesty Program $1,779.79 (base $1,473.16). PERMIT APPLICATION INTAKE: $201.49 at the counter, $112.83 online. BUILDING PERMIT (Master Fee Schedule effective 8/28/2025, R3 residential): new construction $10.60 per $1,000 of construction valuation for plan review plus $8.00 per $1,000 for inspection (each with a $335.81 minimum); repairs/additions/alterations $17.08 plus $26.11 per $1,000. The City's own summary guidance is 'Building Permit Fees: Usually 4-6% of project value.' Plus a 12.70% Records Management & Technology Enhancement fee on all Building Services fees. ZONING INSPECTION for a building permit up to $200,000 valuation: $537.29. NEW SEWER LATERAL CONNECTION (the schedule expressly includes ADUs): $1,867.40. OUSD SCHOOL FEE collected by Planning & Building on the district's behalf: $5.17 per sq ft residential. Note: the widely circulated City 'Secondary Units' handout quoting a $464.89 planning permit fee and 5-6 week building permits was last updated 10/10/2019 and is obsolete - do not cite it. | $160,000-$380,000 | $1,800-$2,600/mo | 8/10 |
| Oceanside | 1,200 sq ft (subject to zone lot coverage above the 850/1,000 sq ft state-guaranteed unit) | 4 ft minimum | Roughly $9-$11 per sq ft in permit fees (local builder estimate) — confirm current schedule with Oceanside Development Services | $300,000-$450,000 | $2,000-$2,500/mo | 7/10 |
| Ontario | 850 sq ft (studio/1-bedroom); 1,000 sq ft (2+ bedrooms) — per Ontario ADU Handout (Rev. 01.21.2025) | 4 ft minimum | $3,000-$6,000 estimated (building permit + plan check); minimum $47.50 per state | $180,000-$300,000 | $1,400-$1,800 | 8/10 |
| Pasadena | 1,200 sq ft (new construction on single-family lots); limited to 1,000 sq ft in most Hillside Overlay districts | 4 ft for new construction; none for conversions of existing structures | 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 | $180,000-$400,000 | $2,200-$2,900/mo | 7/10 |
| Rancho Cucamonga | 1200 sq ft | 4 ft minimum (detached new construction) | Permit fees exist but exact amounts not published online; contact city for current schedule | $170,000-$290,000 | $1,400-$1,800 | 8/10 |
| Riverside | 1,200 sq ft (at least 850 sq ft is guaranteed regardless of lot-coverage standards) | 4 ft maximum (detached new construction) | $3,000-$9,000 typical (building permit + plan check); impact fees scale for units over 750 sq ft | $170,000-$280,000 | $1,300-$1,700 | 8/10 |
| Roseville | 850 sq ft (studio/1BR) or 1,000 sq ft (2+BR) per city handout — the state floor; minimum 150 sq ft | 4 ft for new construction; none for conversions of existing structures (including same-footprint rebuilds) | Per the city's Accessory Dwelling Units Fee Policy — confirm current amounts with Development Services at (916) 774-5332 | $150,000-$300,000 | $1,700-$2,000/mo | 6/10 |
| Sacramento | Local option (17.228.105(B)): 1,200 sq ft — but this is a COMBINED cap. Two detached ADUs on one lot must together stay within 1,200 sq ft (e.g. 400 + 800). State option (17.228.105(C)): 800 sq ft for a detached new-construction ADU. MORE GENEROUS than the state floor for a single unit; the combined-cap nuance is missing from our record. | Local option: NO rear-yard setback required for a single-storey ADU, or the first floor of a multistorey ADU, if the whole unit is more than 60 ft from the front property line. If any part is within 60 ft of the front property line, or for the second floor and above, the minimum is the zone's rear-yard setback or 3 ft, whichever is LESS. No setback at all for an existing structure converted to an ADU. State option: 4 ft. MORE GENEROUS than we say. Local overrides: no ADU may project into the levee setback (20 ft from the landside toe for development under 5 acres, 17.204.240(E)); and no balcony/deck/open-stair landing within 10 ft of the rear lot line may sit more than 3 ft above ground unless that line abuts an alley, street or non-residential use. | Replace the guessed range with the city's OWN published figures. Form CDD-0419, 'Accessory Dwelling Unit (ADU) Fee Estimate (New Construction)', revised 07-12-2026, at a $170.80/sq ft valuation: 749 sq ft = $5,271.90 total; 750 sq ft = $10,624.40; 1,200 sq ft = $14,842.50. Representative line items at 1,200 sq ft: building permit $1,790.36, building plan review $751.95, fire dept administrative $176, fire inspection $294 ($0.11/sq ft, $294 minimum), fire plan review $260, planning inspection $526, planning review $263, public works review $205 deposit + hourly, utilities $205 deposit + hourly, construction excise tax $945.60, general plan fee $533 ($2.60 per $1,000 valuation), residential construction tax $315, technology fee $254.23. NOT included and additional: school district impact fees (calculated and collected by the district, form CDD-0226), Regional Sanitation and Sewer Development fees (the form says 'Check with County'), and possible sewer/water tap, housing and project-area impact fees. The optional ADU Zoning Review is now $0 (the $117 fee was waived). An optional building permit fee estimate service costs $164 (form CDD-0278). Additional review time bills at $216/hr building, $263/hr planning. The city's own caveat: 'This is only an estimate. The actual fees can vary based on project scope, location, fee changes, etc.' | $100,000-$250,000 | $1,300-$1,800/mo | 8/10 |
| San Bernardino | 1200 sq ft; reduces to 800 sq ft if lot coverage exceeded | 4 ft minimum (detached new construction) | $3,000-$12,000 estimated (building permit + plan check; varies by size) | $160,000-$280,000 | $1,300-$1,700 | 8/10 |
| San Diego | 1,200 sq ft | 4 ft | $3,500-$12,000 | $120,000-$300,000 | $1,600-$2,200/mo | 9/10 |
| San Francisco | 850 sq ft gross floor area for a detached ADU with one bedroom or less; 1,000 sq ft for two or more bedrooms. Same cap in BOTH programs (State: PC 207.2(c)(1) and (d)(5)(B); Local: PC 207.1(c)(15)(B)). Exception: a detached ADU on a lot with an existing multifamily building under the State Program has NO maximum size. NOTE: SF measures this as GROSS FLOOR AREA, not interior livable space. | 4 ft is right for a NEW detached structure, but wrong as a blanket rule. State Program (PC 207.2(d)(7)): NO setback is required for an ADU within an existing living area or existing accessory structure, or one that replaces an existing structure at the same location and dimensions; a setback of no more than 4 ft applies otherwise; and for new construction the 4 ft applies only to portions outside the buildable area. Local Program: 4 ft for the detached rear-yard ADU (207.1(c)(15)(A)); but converted space needs NO setback and other Local-Program ADUs must meet the underlying zoning district rear yard (in SF RH districts typically 25% of lot depth, far more than 4 ft) unless the Zoning Administrator grants a rear-yard waiver under 207.1(g). | Replace the guessed range with SF's own published figures. DBI's own estimate: 'City fees range from 6-9% of construction costs' (and architects/engineers about 10%; at least $125,000 in material and labor for a new unit). PLANNING development application fee (Fee Schedule eff. 8/29/2025, rev. 6/15/2026) — New Construction: $3,502 flat under $100k; $3,504 base + 3.855% of cost above $100,000 in the $100k-499,999 band; $19,226 + 1.230% above $500,000. Alteration/Change of Use (garage or interior conversion): $504 under $10k; $516 + 5.274% above $10,000; $3,838 + 3.524% above $50,000; $5,638 + 3.855% above $100,000. Neighborhood notification $121 + $4.25/envelope; permit-revision back check $366. DBI building permit fees are TWO separate charges under SF Building Code Table 1A-A (amended Ord. 112-26, eff. 7/12/2026) — Plan Review: $1,671 + $15.60 per $1,000 over $50,000 ($50k-200k band), $4,011 + $13.31 per $1,000 over $200,000 ($200k-500k band); Permit Issuance: $677 + $4.83 per $1,000 ($50k-200k), $1,402 + $4.21 per $1,000 ($200k-500k). Table 1A-A note 1 states these exclude Public Works, Planning, Fire, Public Health and plumbing/electrical/mechanical permit fees. Add SFUSD school facility fees (calculated by DBI staff), SFPUC and Public Works right-of-way permits. OUR WORKED EXAMPLE (label as our calculation, not a published number): a $300,000 detached ADU = Planning $11,214 + DBI plan review $5,342 + DBI issuance $1,823, roughly $18,400 before trade permits and school fees — about 6% of construction cost, consistent with DBI's 6-9%. FEE WAIVER: building permit fees are waived for permits granting legal status to dwelling units built without permits, for activities prior to 1/1/2020 (Board Ord. 150571). | $200,000-$450,000 | $2,200-$3,200/mo | 9/10 |
| San Jose | Depends on which standards track the applicant chooses. CITY Development Standards (SJMC 20.80.175): 1,000 sq ft on lots under 9,000 sq ft; 1,200 sq ft on lots over 9,000 sq ft. STATE Development Standards (SJMC 20.80.176): 800 sq ft on any lot. Minimum size 150 sq ft under either track. The tracks cannot be mixed. Same size table applies on duplex/multifamily lots under the City track. | CITY Development Standards, detached ADU: 0 ft for the first story, 4 ft for a second story. STATE Development Standards: 4 ft. On duplex/multifamily lots the City track is 0 ft first story / 4 ft second story detached and 0 ft attached. Conversions of existing structures have no rear setback requirement under the State track. City-track detached ADUs must also keep a minimum 6 ft separation from the main home and must not cover more than 40% of the rear yard. | City building permit fees, FY 2026-27 Building and Structure Permits Fee Schedule, effective August 10, 2026. ADU 0-750 sq ft: permit issuance $422, plan review $1,137, inspection $1,732 (total $3,291). ADU 751-1,200 sq ft: permit issuance $633, plan review $1,950, inspection $2,520 (total $5,103). Permit issuance includes addressing assignment for the unit; inspection includes the meter release inspection. Modular fees are 10% lower for plan review and 20% lower for inspections. Separately, an optional preliminary virtual meeting with a planner is billed at the Planning Division's hourly rate of $398/hour with a 30-minute minimum (i.e. $199). These are city permit fees only and exclude school/parkland impact fees, construction taxes, and construction cost. | $180,000-$400,000 | $2,000-$2,800/mo | 8/10 |
| San Mateo | Up to the FAR of the underlying zone and no larger than the primary unit; 800 sq ft is always allowed (ADU area up to 800 sq ft is FAR-exempt) | 4 ft; none for conversions of existing space | Flat planning fees: $2,831.57 new ADU, $2,031.12 ADU remodel, $1,454.02 JADU — plus building permit fees | $250,000-$450,000 | $2,700-$3,100/mo | 7/10 |
| Santa Ana | 1,000 sq ft — but capped at 800 sq ft if you build BOTH an ADU and a JADU on the same lot. Conversions of an existing accessory structure or part of the primary residence are not subject to any size limit. | 4 ft — ADOPTS THE STATE MINIMUM, so our value is right by adoption, not coincidence. Add: no setback is required where the ADU is rebuilt in the same location and to the same dimensions as a demolished structure that already encroached; conversions are exempt from setbacks entirely. | REPLACE THE GUESS WITH PUBLISHED FIGURES. Planning Division FY 2026-2027 Fee Schedule: Accessory Dwelling Unit Review $1,940.00; ADU Over-the-Counter Review $594.00; ADU Pre-Approved Plan Review $524.00. Certain applications also carry a 7% technology fee per transaction, and from July 1, 2026 a 2.5% credit/debit card processing fee. These are PLANNING fees only — building permit fees are additional and the city does not publish them ('Building permit fees vary according to the scope of work'; Permit Counter (714) 647-5800). | $130,000-$300,000 | $1,700-$2,300/mo | 7/10 |
| Santa Monica | 850 sq ft (studio/1-bedroom) or 1,200 sq ft (2+ bedrooms) | 4 ft; none for conversions of existing structures (including pre-Jan 1, 2020 unpermitted structures being legalized) | Valuation-based plan check and building permit fees paid through Citizen Access; confirm current totals with Santa Monica Building & Safety via the 311 system | $250,000-$500,000 | $3,000-$3,700/mo | 8/10 |
| Torrance | 1,000 sq ft (800 sq ft under the state-exempt ministerial path); accessory-structure conversions exempt from the cap | 4 ft (detached); same as primary dwelling for attached; none for conversions of existing structures | Fee assessed at building-permit application covering plan review, permit processing, and development impact mitigation — confirm amounts with Community Development, (310) 618-5990 | $200,000-$380,000 | $2,100-$2,400/mo | 5/10 |
| Upland | 850 sq ft (studio/1-bedroom); 1,000 sq ft (2+ bedrooms); an 800 sq ft ADU can never be precluded by lot coverage, FAR, or open-space standards | 4 ft minimum; none for same-location/same-dimension rebuilds | Building permit and plan-check fees via the Development Services Department — confirm amounts with Building & Safety, (909) 931-4110 | $160,000-$300,000 | $1,950-$2,150/mo | 6/10 |
Building on land outside city limits? Unincorporated county areas follow the county's ADU code, not a city's. We cover these California counties:
ADU rules for unincorporated Sacramento County — county-regulated land outside any city.
View county rules →ADU rules for unincorporated San Bernardino County — county-regulated land outside any city.
View county rules →ADU rules for unincorporated Riverside County — county-regulated land outside any city.
View county rules →ADU rules for unincorporated Los Angeles County — county-regulated land outside any city.
View county rules →ADU rules for unincorporated San Diego County — county-regulated land outside any city.
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