Sacramento offers an excellent balance of affordability and ADU-friendliness. As California's capital, the city has been proactive in adopting state ADU reforms and offers some of the best ROI in the state.
Outside city limits? If your property is in unincorporated Sacramento County (not within Sacramento's boundaries), different rules apply — see our Sacramento County (unincorporated) ADU rules.
Zoning & Size Requirements [1]
Yes — Sacramento allows ADUs. A detached ADU can typically be up to 1,200 sq ft under current California and Sacramento zoning rules.
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| Allowed Zones | Recommend replacing the zone list with the code's actual test, which is not a zone letter. ADUs and JADUs appear as ACCESSORY uses in the residential zone use tables — I confirmed this directly in R-1 (17.204.210(C)) and R-2 (17.204.510(C)), each listing 'Dwelling unit, accessory' and 'Dwelling unit, junior accessory' subject to 17.228.105 — and 17.228.105(C) applies ministerial approval 'within a residential or mixed-use zone'. The operative gate under the local option is 17.228.105(B)(2)(a)(i): the lot must already be improved with, or be concurrently building, a single-unit, duplex or multi-unit dwelling. Add the two real exclusions our page misses: ADUs are PROHIBITED in the EA-1 Executive Airport clear zone and limited to one unit in EA-2/EA-3 (17.312.060); and an ADU in one of the city's 31 historic districts or on a landmark property must meet the city's ADU Design Standards for Historic Properties. NOTE: I did not open the use table for every zone in our current list, so the enumeration as written is not something I can stand behind — see confidence note. |
| Max Size (Detached) | 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. |
| Max Size (Attached) | WRONG AS WRITTEN. The cap is the GREATER of (a) 50% of the existing floor area of the primary dwelling, or (b) 850 sq ft if one bedroom or less / 1,000 sq ft if more than one bedroom. There is no 1,200 sq ft ceiling on an attached ADU, and 50% is a floor-raiser, not a cap — on a 3,000 sq ft house an attached ADU may reach 1,500 sq ft. MORE GENEROUS than we say. |
| Max Size (JADU) | 500 sq ft. Correct — city adopts the state maximum. Must be within the walls of a single-unit dwelling (which may include an attached garage), with its own separate entrance and an efficiency kitchen. If it has no separate bathroom it must also have an interior entry to the main living area. |
| Max Height | WRONG for the local option — this is the single most valuable correction. Local option (17.228.105(B)(2)(c)(ii)): the height limit of the underlying zone applies to the ADU. That is 35 ft in R-1 (17.204.220(A)) and 35 ft in R-2 (17.204.520(A)). State option (17.228.105(C)): 18 ft, or 20 ft where extra height is needed to align the roof pitch with the primary dwelling. FAR MORE GENEROUS than the state floor — note the city even beats the state floor inside its by-right lane (18 ft base rather than 16 ft, 20 ft rather than 18 ft with pitch). |
| Max Units | UNDERSELLS BADLY. Local option (17.228.105(B)(1)(a)): a lot with a single-unit dwelling may have two ADUs, one ADU + one JADU, or two JADUs; a lot with a duplex or multi-unit dwelling may have two ADUs. State option (17.228.105(C)): the city's own portal reads this as up to THREE on a single-unit lot — one attached conversion ADU + one JADU + one detached ADU — and on a multi-unit lot up to 8 detached (never exceeding the number of existing units; 2 if the multi-unit dwelling is only proposed) plus conversions of non-livable space up to the greater of one or 25% of existing units. The two options MAY NOT BE COMBINED — the owner elects one. Commercially relevant side effect: an ADU approved under the local option may be short-term rented (subject to 17.228.104), whereas one approved under the state option may NOT be rented for terms under 30 days. Local exception: EA-2 and EA-3 Executive Airport overlay zones allow only one ADU or JADU per lot, and EA-1 (clear zone) prohibits ADUs entirely (17.312.060). |
Setback Requirements [1]
Sacramento requires a rear setback of about 60 ft for a detached ADU, and parking requirements vary by unit size or location. Owner-occupancy is set by local rules (confirm with the city).
| Rear Setback | 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. |
| Side Setback | Interior side yard: same rule as rear — zero for a single-storey unit (or first floor) more than 60 ft back from the front property line; otherwise the zone's setback or 3 ft, whichever is less. State option: 4 ft. STREET side yard is the exception and cuts the other way: under the local option an ADU must meet the zone's full street side-yard setback, which is 12.5 ft in R-1 (17.204.240(C)) — materially STRICTER than the 4 ft state floor and a real constraint on corner lots. FLAG: the city's defence is presumably that an applicant can always elect the 17.228.105(C) state lane and get 4 ft instead, so the local option reads as an opt-in alternative rather than an imposed standard. Worth watching, not worth asserting as preempted. |
| Front Setback | Correct as far as it goes but incomplete. The zone's front-yard setback applies (in R-1 it is contextual — matched to the two nearest buildings on the block, or 20 ft if there is no other building on that block face). MORE GENEROUS addition our record omits: one ADU of 800 sq ft or less may be built INSIDE the front-yard setback if the rear and side yard area cannot accommodate either a two-storey detached ADU of at least 800 sq ft or an attached ADU of at least 800 sq ft. That is a genuine local escape hatch for deep-house/shallow-yard lots. |
| Parking Required | Right answer, understated reason. Sacramento has abolished minimum off-street vehicle parking CITYWIDE for every land use, not just for ADUs — 17.608.030(B). Separately, 17.608.020(K) provides that when existing parking is removed to build an ADU or JADU, no replacement parking is required for the ADU or for any other dwelling unit on the lot. That means a garage conversion triggers no replacement-parking obligation for the main house either. MORE GENEROUS and more robust than the state exemptions. |
| Owner Occupancy | MISLEADING — correct for ADUs, wrong for JADUs. No owner-occupancy requirement is imposed on an ADU. But 17.228.105(B)(3)(b) requires the owner to reside onsite for ANY JADU, with the only carve-out being ownership by a government agency, land trust or housing organization — there is NO exception for a JADU that has its own bathroom. FLAG AS LIKELY PREEMPTED: Gov. Code 66333(b) (as amended by AB 1154, eff. 1/1/2026) permits a JADU owner-occupancy requirement only where the JADU SHARES sanitation with the primary dwelling. The city's code has not been conformed. Recommend publishing this as 'the city code still requires it for all JADUs; state law appears to limit that to shared-bathroom JADUs — confirm with Planning before relying on either reading' rather than picking a side. |
| Min Lot Size | No minimum — correct, and I read 17.228.105 end to end to confirm it imposes no minimum lot size, lot width or lot depth on an ADU. Worth adding the related local benefit: an ADU occupying under 800 sq ft of lot coverage is exempt from the zone's maximum lot coverage AND minimum open-space requirements (R-1/R-2 lot coverage is otherwise capped at 40% or 2,500 sq ft, whichever is greater, never above 50%). The 5,200 sq ft interior / 6,200 sq ft corner minimums in 17.204.230 and 17.204.530 govern lot creation, not ADU eligibility, and should not be quoted at homeowners as an ADU barrier. |
Permit Process & Fees [2][3]
An ADU permit in Sacramento goes through a ministerial, by-right review. Typical timeline: 60 days — correct, and this is genuinely in the CITY's code, not merely restated state law, which is worth saying. Two conditions our record omits: (1) the 60 days runs from a COMPLETE application and only where there is an existing residential use on the lot; (2) if the ADU is filed alongside an application for new residential development, the city may defer the ADU decision until the primary is approved, and the clock tolls for any applicant-requested delay. Deemed-approved remedy is in the code text. Separately, AB 1332 preapproved plans carry a 30-day approval — but see pre_approved_plans, the city's AB 1332 catalog is currently empty, so no homeowner can actually use that 30-day path today.. Permit fees: 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.'.
| Approval Process | Ministerial — correct, and worth expanding because the sequencing is a real-world stumbling block. 17.228.105(B)(4)(a) requires the city to ministerially review all ADU/JADU applications. Per the Building Division's own handout (CDD-0423, rev. 01-29-2026), planning approval must be obtained BEFORE a building permit application is filed, unless the applicant secures an approved Memorandum of Understanding for concurrent plan review from senior Planning staff. Plans may be filed via electronic plan check. A free optional ADU Zoning Review is offered as a pre-check against the Planning and Development Code. A separate address is required for each ADU. Deviations from the local development standards are available, but only via discretionary site plan and design review under Ch. 17.808 (17.228.105(B)(5)) — that route is NOT ministerial. Useful cost note from the same handout: a detached ADU is exempt from fire sprinklers if the main house is unsprinklered and the ADU (excluding garage) does not exceed 1,200 sq ft. |
| Review Timeline | 60 days — correct, and this is genuinely in the CITY's code, not merely restated state law, which is worth saying. Two conditions our record omits: (1) the 60 days runs from a COMPLETE application and only where there is an existing residential use on the lot; (2) if the ADU is filed alongside an application for new residential development, the city may defer the ADU decision until the primary is approved, and the clock tolls for any applicant-requested delay. Deemed-approved remedy is in the code text. Separately, AB 1332 preapproved plans carry a 30-day approval — but see pre_approved_plans, the city's AB 1332 catalog is currently empty, so no homeowner can actually use that 30-day path today. |
| Permit Fees | 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.' |
| Impact Fees | Substantively correct — keep the state-law framing, but attach the city's actual dollar figures, which is where the value is. From CDD-0419: at 749 sq ft every impact fee line reads '-' (zero). At 750 sq ft they switch on: Park Development Impact Fee $2,617.50, SAFCA (Sacramento Area Flood Control Agency) Development Impact Fee $1,575.00, Sacramento Transportation Authority mitigation + 2% admin $1,154.64. At 1,200 sq ft: $4,188.00 / $2,520.00 / $1,415.76. Citywide Transportation Development Impact Fee shows as zero at all three sizes. School district impact fees apply at ANY size and are paid directly to the district. Net: crossing 750 sq ft adds roughly $5,347 in one step. The form flags that SAFCA/park/STA fees 'May be lower in certain infill areas or incentive zones'. IMPORTANT NEGATIVE FINDING: the City page titled 'reduction-of-development-impact-fees-for-new-adus' is NOT an ADU waiver — I read it, and it reduces certain impact fees to zero only for deed-restricted affordable dwelling units (30-year affordability, agency confirmation required, subject to funding availability). Do not write it up as an ADU incentive. |
| Plan Check | Standard review |
| Pre-Approved Plans | True but it conflates two distinct programmes, and only one of them actually has plans in it today. (1) SHELF READY ADU PLANS — three free city-designed detached plan sets: studio 367, one-bedroom 559, two-bedroom 747 habitable sq ft. All-electric, meet 2022 Residential Building Code, also loaded into Symbium Build for site planning. Modifications are NOT allowed, though mirroring is; the applicant supplies a site plan. All three are deliberately under the 750 sq ft impact-fee threshold — a homeowner using the two-bedroom plan saves roughly $5,350 in impact fees versus a 750 sq ft custom unit. (2) AB 1332 PREAPPROVED ADU PROGRAM (Gov. Code 65852.27) — the city has stood up the required process and web page for third-party preapproved plans, but the catalog is CURRENTLY EMPTY: the page says 'Check back for regular updates' with no plans listed. Either route still requires site-specific planning and zoning approval before permit issuance. Recommend our page distinguishes the two and states the shelf-ready sizes, since that is the concrete saving. |
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Construction Costs [4][5]
Building an ADU in Sacramento typically costs $100,000-$250,000 ($150-$300 per sq ft); a garage conversion runs $60,000-$140,000.
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| Average Build Cost | $100,000-$250,000 |
| Cost per Sq Ft | $150-$300 |
| Garage Conversion | $60,000-$140,000 |
| Prefab ADU (Installed) | $80,000-$200,000 |
Finance Your ADU Project
Most ADU projects are funded through HELOCs, construction loans, or cash-out refinancing. Compare rates from top lenders.
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Rental Income Potential [6][7]
A 2-bedroom ADU in Sacramento rents for around $1,600-$2,200/mo, an estimated 8-12% annual return.
| Avg Rent (1 Bedroom) | $1,300-$1,800/mo |
| Avg Rent (2 Bedroom) | $1,600-$2,200/mo |
| Short-Term Rental | Allowed with permit in certain zones |
| Est. Annual ROI | 8-12% annual return |
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Prefab ADUs can save 20-40% vs. traditional construction and cut build time in half.
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Recent Law Changes
What's Changed Recently
- Effective July 1, 2026: the $117 fee for the optional ADU zoning review is waived (free pre-check that plans comply with the Planning and Development Code before permit submittal); the city's free Shelf Ready ADU Plans were updated December 2025
- SB 543 (Jan 2026): ADU applications deemed approved if city fails to act within 60 days
- AB 1154 (effective Jan 1, 2026): A locality may require owner-occupancy for a JADU only if it shares a bathroom with the primary dwelling; JADUs with their own bathroom are exempt (matching detached ADU rules)
- SB 1211 in effect (2025-2026): Up to 8 detached ADUs allowed on multifamily lots statewide
- AB 1033 opt-in expanding (2026): More cities allowing separate sale of ADUs as condos
Tips for Building an ADU in Sacramento
- Sacramento offers the best ROI in California due to low build costs + solid rents
- Pre-approved plans can cut your timeline by months
- Garage conversions are popular and affordable here
- The city's ADU assistance program may offer additional resources
ADU Builders in Sacramento
Looking for an ADU builder in Sacramento? ADU projects need a contractor experienced with local zoning, the permit process, and utility connections — not every general contractor has built one. We match Sacramento homeowners with experienced local ADU contractors who provide free, no-obligation quotes. Getting at least three bids typically saves 20-40% on the same scope.
Sources & References
All data on this page is sourced from official government records and verified market data. View our full methodology.
- What are ADUs? — City of Sacramento ADU Portal Planning Department — Accessed 2026-02-24
- Shelf Ready ADU Plans | Sacramento Planning Department — Accessed 2026-02-24
- Streamline Sacramento — Council presentation (ADU zoning review fee waiver, eff. 7/1/2026) Government Data — Accessed 2026-07-27
- Angi — ADU Construction Cost Data Market Data — Accessed 2026-02-24
- Angi — Local ADU Contractor Costs Market Data — Accessed 2026-02-24
- Zillow Rental Manager — Market Rent Data Market Data — Accessed 2026-02-24
- HUD Fair Market Rents Government Data — Accessed 2026-02-24
- City of Sacramento ADU Resource Center Planning Department — Accessed 2026-02-24
- California ADU Handbook — HCD Government Data — Accessed 2026-02-24
Frequently Asked Questions
Can I build an ADU in Sacramento?
Yes. ADUs are allowed in Recommend replacing the zone list with the code's actual test, which is not a zone letter. ADUs and JADUs appear as ACCESSORY uses in the residential zone use tables — I confirmed this directly in R-1 (17.204.210(C)) and R-2 (17.204.510(C)), each listing 'Dwelling unit, accessory' and 'Dwelling unit, junior accessory' subject to 17.228.105 — and 17.228.105(C) applies ministerial approval 'within a residential or mixed-use zone'. The operative gate under the local option is 17.228.105(B)(2)(a)(i): the lot must already be improved with, or be concurrently building, a single-unit, duplex or multi-unit dwelling. Add the two real exclusions our page misses: ADUs are PROHIBITED in the EA-1 Executive Airport clear zone and limited to one unit in EA-2/EA-3 (17.312.060); and an ADU in one of the city's 31 historic districts or on a landmark property must meet the city's ADU Design Standards for Historic Properties. NOTE: I did not open the use table for every zone in our current list, so the enumeration as written is not something I can stand behind — see confidence note. in Sacramento. The maximum size for a detached ADU is 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.. Owner-occupancy: MISLEADING — correct for ADUs, wrong for JADUs. No owner-occupancy requirement is imposed on an ADU. But 17.228.105(B)(3)(b) requires the owner to reside onsite for ANY JADU, with the only carve-out being ownership by a government agency, land trust or housing organization — there is NO exception for a JADU that has its own bathroom. FLAG AS LIKELY PREEMPTED: Gov. Code 66333(b) (as amended by AB 1154, eff. 1/1/2026) permits a JADU owner-occupancy requirement only where the JADU SHARES sanitation with the primary dwelling. The city's code has not been conformed. Recommend publishing this as 'the city code still requires it for all JADUs; state law appears to limit that to shared-bathroom JADUs — confirm with Planning before relying on either reading' rather than picking a side.
How much does an ADU cost in Sacramento?
ADU construction in Sacramento typically costs $100,000-$250,000. Garage conversions run $60,000-$140,000, and prefab ADUs cost $80,000-$200,000.
How much can I rent an ADU for in Sacramento?
Average ADU rents in Sacramento are $1,300-$1,800/mo for a 1-bedroom and $1,600-$2,200/mo for a 2-bedroom unit.
Do I need parking for an ADU in Sacramento?
Right answer, understated reason. Sacramento has abolished minimum off-street vehicle parking CITYWIDE for every land use, not just for ADUs — 17.608.030(B). Separately, 17.608.020(K) provides that when existing parking is removed to build an ADU or JADU, no replacement parking is required for the ADU or for any other dwelling unit on the lot. That means a garage conversion triggers no replacement-parking obligation for the main house either. MORE GENEROUS and more robust than the state exemptions.. Check with Sacramento planning department for the latest California ADU parking rules, as many states have relaxed requirements in recent years.
How long does it take to get an ADU permit in Sacramento?
The permit review timeline in Sacramento is 60 days — correct, and this is genuinely in the CITY's code, not merely restated state law, which is worth saying. Two conditions our record omits: (1) the 60 days runs from a COMPLETE application and only where there is an existing residential use on the lot; (2) if the ADU is filed alongside an application for new residential development, the city may defer the ADU decision until the primary is approved, and the clock tolls for any applicant-requested delay. Deemed-approved remedy is in the code text. Separately, AB 1332 preapproved plans carry a 30-day approval — but see pre_approved_plans, the city's AB 1332 catalog is currently empty, so no homeowner can actually use that 30-day path today.. Permit fees: 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.'.
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