Prefab ADUs in Sacramento
Sacramento lets you build two ADUs on one lot — and the City has permitted 1,710 ADUs since 2021. We deliver an all-in prefab ADU from our factory in Lathrop — permits, foundation, delivery and installation included — at one fixed price.
Free lot check · zoning, setbacks, utilities · reply with a fixed price
Licensed builder · Our own factory in Lathrop, CA
Real homes we build, start to finish
Quick answer
ADUs in Sacramento — key facts for 2026
Most Sacramento homeowners can add up to two ADUs, with detached ADUs totaling up to 1,200 sq ft and impact fees waived under 750 sq ft. Bay Modular delivers a factory-built ADU all-in for $124,900–$271,900 — the same price anywhere in California.
- Can I build an ADU in Sacramento?
- Yes, on most residential lots with a house. Sacramento allows up to two ADUs per lot; detached ADUs can total up to 1,200 sq ft (for example 400 + 800).
- How long does a Sacramento ADU permit take?
- You get Planning approval (or request concurrent review) and then a building permit; state law requires a decision within 60 days of a complete application.
- What fees does Sacramento charge?
- Impact fees are waived for ADUs under 750 sq ft. School district fees apply, but only to ADUs over 500 sq ft.
- How much does a prefab ADU cost in Sacramento?
- Bay Modular: $124,900–$271,900 all-in, the same price as anywhere in California, permits and installation included.
- How many ADUs does Sacramento build?
- 401 ADU permits in 2025 and 1,710 from 2021 to 2025.
- What does an ADU rent for in Sacramento?
- Average asking rent in Sacramento was $2,056 a month in August 2026 (Zillow), up 26% since January 2021.
Sources: HCD APR 2025, City of Sacramento ADU handout CDD-0423 (Jan 2026) and ADU page, Zillow ZORI Aug 2026. Last reviewed October 2026.
Sacramento in numbers
Sacramento has permitted 1,700+ ADUs since 2021
ADU permits rose from 252 in 2021 to about 400 a year — and their share of all new homes tripled, from 5% to 15%.
ADU permits issued in the City of Sacramento
Source: California HCD Annual Progress Report data (Table A2), City of Sacramento, permits issued per year. Percent = ADUs among all housing units permitted in the city that year.
average Sacramento asking rent since January 2021 ($1,628 → $2,056)
Zillow Observed Rent Index, City of Sacramento, Aug 2026ADU permits issued in Sacramento in five years (2021–2025)
HCD APR data, 2021–2025Can I build in Sacramento?
Most Sacramento lots with a house can add an ADU
Sacramento’s ADU rules follow state law with a generous local twist: two ADUs per lot. Here is what matters for most homeowners:
Sacramento allows up to two ADUs, attached or detached, on a lot with a house.
Detached ADUs can total up to 1,200 sq ft (for example 400 + 800); attached: 50% of the house or 850 sq ft. All our models fit.
An 800 sq ft ADU with 4-ft side and rear setbacks and 16 ft of height can't be denied under state law.
Get Planning approval — or request concurrent review — before the building permit.
ADUs can be rented separately, but can't be sold apart from the main house.
Sacramento offers free permit-ready ADU plans — we use our own HCD-approved designs.
Based on the City of Sacramento ADU handout CDD-0423 (revised Jan 29, 2026), the City ADU page and state ADU law. Not legal advice — rules depend on your exact lot. More in our ADU guides.
New in 2027: under AB 956 (Chapter 791, Statutes of 2026), from January 1, 2027 state law lets you build two detached ADUs on a lot with a single-family home, and HOA rules can’t block an ADU on a lot zoned to allow one.
Costs & fees in Sacramento
What an ADU costs in Sacramento
Same all-in price as anywhere in California. Our models are all under 750 sq ft, so none pays impact fees — and four of five pay no school fees.
| Model | All-in price | School fees | City impact fees |
|---|---|---|---|
| Backyard Studio120 sq ft · home office or guest studio, not a rentable ADU | $75,900 | $0 | $0 |
| Small Studio256 sq ft | $124,900 | $0 | $0 |
| Large Studio ADU320 sq ft | $154,900 | $0 | $0 |
| 1 Bedroom ADU480 sq ft | $214,900 | $0 | $0 |
| 2 Bedroom ADU640 sq ft | $271,900 | $3,443 | $0 |
Sources: Gov. Code §66311.5; Ed. Code §17620 and State Allocation Board 2026 school fee maximum; Gov. Code §66311.5. Launch pricing runs through December 31, 2026. Comparison is general — every project differs.
Renting in Sacramento
Renting out an ADU in Sacramento
average asking rent for all homes in Sacramento — up 26% since 2021. HUD's 2027 fair rent for a 2-bedroom in the area is $2,201.
Zillow Observed Rent Index, City of Sacramento, Aug 2026 · HUD FY2027 FMR ADU for rental incomeSacramento ADUs may be rented separately from the house but can't be sold or conveyed on their own.
With up to two ADUs per lot, some owners rent one and keep one for family.
A new ADU is exempt from California's statewide rent cap (AB 1482) for 15 years after its certificate of occupancy.
Same money, other options
Yearly income per dollar, before taxes and costs. An ADU wins because you already own the land. Full comparison →
Sources: Gov. Code §66333; Civil Code §1947.12. Comparison: HUD FY2027 2-bedroom Fair Market Rent, Sacramento-Roseville-Arden-Arcade ($2,201) × 12 ÷ $271,900; U.S. Treasury (Oct 6, 2026); FTSE Nareit (Sep 2026); Zillow ZORI ÷ ZHVI, Sacramento metro (Aug 2026); FDIC (Sep 2026). Not legal or investment advice.
Permits in Sacramento
How your Sacramento permit works — we handle it
Free lot check
Zoning, alley access, setbacks, sewer and power for your Sacramento address.
Planning approval
Planning review first — or concurrent Planning and Building review on request.
Building plan check
Our HCD-approved plans submitted electronically with energy, CALGreen and solar documents.
Decision in 60 days
State law requires a decision on a complete ADU application within 60 days. Your ADU is built in our factory meanwhile.
Install & move in
Delivered from our Lathrop factory — about an hour away — installed in about a week, inspected, then your Certificate of Occupancy.
Based on the City of Sacramento ADU handout CDD-0423 and Gov. Code §66317.
Why now
Start your Sacramento ADU with zero risk
Lock in launch pricing, see exactly what you get, and only decide once you have a fixed price for your lot.
All-in from $75,900 — everything included
- Backyard Studio (home office)$75,900All-in · fixed in writing
- Small Studio$124,900All-in · fixed in writing
- Large Studio ADU$154,900All-in · fixed in writing
- 1 Bedroom ADU$214,900All-in · fixed in writing
- 2 Bedroom ADU$271,900All-in · fixed in writing
Zero-risk start
- Free lot check & quoteNo obligation, no credit card.
- One fixed all-in priceDesign, permits, delivery and install — one number.
- HCD-approved plansState approval #1585366, financed and appraised like a home.
- 2-year warrantyOn materials and workmanship.
Visit our factory in Lathrop, CA and walk through a finished ADU.
Sacramento ADU questions
Read our ADU guides, see all of California, or call (209) 214-6845.
Can I build an ADU on my lot in Sacramento?
Most Sacramento residential lots with a house can add up to two ADUs; detached ADUs can total up to 1,200 sq ft. We check your address for free.
Can I build two ADUs in Sacramento?
Yes. Sacramento allows a total of two ADUs per lot, attached or detached — for example a 400 sq ft and an 800 sq ft detached ADU.
How much does an ADU cost in Sacramento?
Our all-in prices are the same as anywhere in California: from $124,900 for a Small Studio to $271,900 for a 2 Bedroom ADU, with launch pricing through December 31, 2026. Impact fees are waived under 750 sq ft, and school fees apply only above 500 sq ft.
How long does an ADU permit take in Sacramento?
Planning approval (or concurrent review) comes first, then the building permit; state law requires a decision within 60 days of a complete application. Most projects take 4–6 months from signing to keys.
Can I sell my Sacramento ADU separately?
No. ADUs can be rented separately but can't be sold or conveyed apart from the main house.
Do I need parking for an ADU in Sacramento?
Under state law, no parking is required within half a mile walking of public transit or for conversions; we check your lot.
How far is Bay Modular from Sacramento?
Our factory in Lathrop is about an hour south of Sacramento — one of the shortest delivery runs we have.
Is an ADU a better investment than a rental property in Sacramento?
For most homeowners with room on their lot, yes: you don't buy land. A 2 Bedroom ADU at HUD's 2027 fair rent for a 2-bedroom in the Sacramento area ($2,201) earns about 10% a year on its price before costs, vs. about 4.8% for a typical Sacramento-metro rental home (Zillow, Aug 2026). Not investment advice.
Free · no obligation
Can you build an ADU on your Sacramento lot?
Send your Sacramento address. We'll check zoning, alley access, setbacks and utilities, and send a fixed all-in price — permits included.
HCD-approved plans (#1585366) · 2-year warranty · factory in Lathrop, CA
Sources: California HCD Annual Progress Report data, Table A2 (City of Sacramento, 2021–2025, updated Oct 2026); Zillow Observed Rent Index, City of Sacramento (Aug 2026); HUD FY2027 Fair Market Rents (Sacramento-Roseville-Arden-Arcade); City of Sacramento ADU handout CDD-0423 (Jan 2026) and ADU page; Gov. Code §§66314–66333. Prices: Bay Modular, October 2026. Not legal advice.