Sacramento ADU Rules, Setbacks & Permits
Updated June 12, 2026 · Upside ADU
Quick answer
In the City of Sacramento you can build up to two ADUs per single-family lot (one ADU plus one Junior ADU). Detached ADUs can be up to 1,200 sq ft, require 4 ft side and rear setbacks, max 16 ft height (25 ft near major transit), and need no added parking. With pre-approved plans, permitting can take about 30 days.
What are the key Sacramento ADU rules in 2026?
These are the rules that decide what you can build on a typical City of Sacramento single-family lot. They're set by a mix of state law (which preempts conflicting local rules) and local ordinance. For statewide law changes — SB 1211, AB 1033, and the 2025 preemption — see the dedicated 2026 law guide; this guide covers how those rules actually apply on the ground in the Sacramento region.
- Up to 2 ADUs per single-family lot (one standard ADU + one JADU)
- Detached ADU max size: 1,200 sq ft
- Setbacks: 4 ft from side and rear property lines (state minimum)
- Height: up to 16 ft, or up to 25 ft within ½ mile of major transit
- Parking: no replacement parking required for garage conversions
- Owner-occupancy: not required for ADUs permitted after Jan 1, 2020
- Impact fees: waived for ADUs under 750 sq ft
See also:California ADU law in 2026 — the statewide rules behind these
What are the setback, height, and size limits?
Setback, height, and size limits are where most feasibility questions get answered. The 4-foot minimum side and rear setback is the state floor set under California's ADU law (per California HCD), and cities can't require more. The table summarizes the figures most Sacramento homeowners need. Note that a garage conversion staying inside the existing footprint generally doesn't need to meet the 4-foot setback — the existing structure is grandfathered.
Sacramento ADU dimensional standards (2026)
| Standard | Detached ADU | Attached ADU | JADU |
|---|---|---|---|
| Max size | 1,200 sq ft | 50% of main house | 500 sq ft |
| Side/rear setback | 4 ft | 4 ft | Existing walls |
| Height | 16 ft (25 ft near transit) | Matches main house limits | Within existing home |
| Added parking | None required | None required | None required |
How long does an ADU permit take in Sacramento?
California law requires jurisdictions to approve or deny a complete ADU application within 60 days (per California HCD). Using a city's pre-approved or shelf-ready plan set can cut that to about 30 days because the design has already cleared plan check. The City of Sacramento's ADU Resource Center and Sacramento County's Shelf-Ready ADU Plans both speed this path.
Typical Sacramento ADU permit timelines (2026)
| Path | Plan check | Notes |
|---|---|---|
| Pre-approved / shelf-ready plans | ~30 days | Design already vetted by the jurisdiction |
| Standard custom submittal | Up to 60 days | State-mandated approve-or-deny clock |
| Incomplete application | Clock pauses | 60-day clock restarts when resubmitted complete |
See also:Pre-approved ADU plans in California — how AB 1332 and shelf-ready plans cut permit time
What do you need to submit for an ADU permit?
A complete application is what starts the 60-day clock, so assembling it correctly is the difference between a 30-day and a 90-day approval. Most Sacramento-area jurisdictions want the same core package, whether you use a pre-approved plan or a custom design.
- Site plan showing the ADU, setbacks, and existing structures
- Floor plans and elevations (or the jurisdiction's pre-approved plan number)
- Title 24 energy-compliance documentation
- Structural calculations and, where required, a soils report
- Utility plan for water, sewer, and electrical service
- Completed application and fees for the governing jurisdiction
See also:What an ADU costs in Sacramento — including permit fees
Do you have to live on the property to rent your ADU?
For ADUs permitted on or after January 1, 2020, the state suspended owner-occupancy requirements — you do not have to live on the property to rent the ADU. Junior ADUs are the exception: a JADU still requires the owner to occupy either the main house or the JADU. Short-term rentals (under 30 days) are restricted in much of the region, so most ADUs are built for long-term tenancy.
How do ADU rules vary by jurisdiction?
The Sacramento region spans four counties, and each runs its own permit counter with its own fees and review steps. Knowing which office governs your address is the first feasibility question.
Which jurisdiction permits your ADU
| City / area | Permitting jurisdiction | County |
|---|---|---|
| Sacramento, North Highlands | City of Sacramento / County | Sacramento |
| Elk Grove, Folsom, Citrus Heights | Own city building dept. | Sacramento |
| Roseville, Rocklin, Lincoln | Placer County / city | Placer |
| El Dorado Hills, Cameron Park | El Dorado County | El Dorado |
| Davis, Woodland, West Sacramento | Yolo County / city | Yolo |
What are the most common permitting mistakes?
- Submitting an incomplete application — the 60-day clock won't start until it's complete
- Assuming City of Sacramento rules apply when your address is unincorporated county
- Designing over 750 sq ft and triggering impact fees you could have avoided
- Skipping a soils report where the jurisdiction requires one, causing a plan-check rejection
- Forgetting that a JADU still carries an owner-occupancy requirement
How do you verify the rules for your lot?
This guide is orientation, not a permit determination. Setbacks, fees, and review steps change as cities update their ordinances to match state law. Confirm the current requirements with your specific jurisdiction's building department before you finalize a design — we do this as part of a free feasibility check.
See also:What an ADU costs in Sacramento · Talk to a builder
This guide is general information, not legal or tax advice. ADU rules change often and vary by city — we confirm the current requirements for your jurisdiction during your free feasibility check.
Sources & references
- Accessory Dwelling Units — official guidance — California Dept. of Housing & Community Development (HCD)
- SB 1211 (2024) — ADUs on multifamily lots — California Legislative Information
- ADU resources & pre-approved plans — City of Sacramento — Community Development
External links open official government and lender resources. Construction price and rent figures reflect 2026 Sacramento-region market conditions; confirm current rules and fees with your jurisdiction.