Prefab ADUs in Los Angeles
LA builds more ADUs than any city in California. We deliver an all-in prefab ADU — permits with LADBS, foundation, delivery and installation included — at one fixed price.
Free lot check · zoning, fire & hillside maps · reply with a fixed price
Licensed builder · Our own factory in Lathrop, CA
Real homes we build, start to finish
Quick answer
ADUs in Los Angeles — key facts for 2026
Most Los Angeles homeowners can add an ADU. The City must decide on a complete permit within 60 days, small ADUs pay little or no city fees, and 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 Los Angeles?
- Yes, on most single-family lots. State law guarantees at least an 800 sq ft ADU with 4-ft side and rear setbacks.
- How long does an LA ADU permit take?
- The City must approve or deny a complete application within 60 days (Gov. Code §66317).
- What fees does LA charge?
- No city impact fees under 750 sq ft; no LAUSD school fee up to 500 sq ft; ADUs are exempt from the Park and Linkage fees.
- How much does a prefab ADU cost in LA?
- Bay Modular: $124,900–$271,900 all-in, the same price as anywhere in California, permits and installation included.
- How many ADUs does LA build?
- 7,446 ADU permits in 2025 — 41% of all new homes permitted in the city and the most in California.
- What does an ADU rent for in LA?
- Average asking rent in the City of LA was $2,778 a month in August 2026 (Zillow).
Sources: HCD APR 2025, LADBS P/BC 2026-150, ZA Memo 143, Zillow ZORI Aug 2026. Last reviewed October 2026.
LA in numbers
ADUs are now a big part of how LA builds homes
Fewer total permits than the 2022 peak — but ADUs keep taking a bigger share of all new homes in the city.
ADU permits issued in the City of Los Angeles
Source: California HCD Annual Progress Report data (Table A2), City of Los Angeles, permits issued per year. Percent = ADUs among all housing units permitted in the city that year.
average LA asking rent since January 2021 ($2,247 → $2,778)
Zillow Observed Rent Index, City of LA, Aug 2026in California for ADU permits — more than San Diego, Long Beach and San Jose combined
HCD APR data, 2025Can I build in LA?
Most LA lots with a house can add an ADU
California law sets the floor; the City of LA adds a few local rules. Here is what matters for most homeowners:
Up to 800 sq ft is guaranteed by state law, even in historic (HPOZ) districts. Larger is often possible.
Side and rear setbacks of 4 ft max; a detached ADU can be at least 16 ft tall.
None required near transit or in historic districts — and a garage you replace doesn't need replacing.
LA's own ADU rules restrict some lots that are in both a Very High Fire Hazard Zone and a Hillside Area — but ADUs allowed under state law can still be built there. We check which path fits your lot.
Near the coast you'll also need a coastal permit. We tell you up front.
LA's Emergency Executive Order 1 fast-tracks ADUs on lots where the home was destroyed — before, with or after rebuilding the main house.
Based on LA City Planning ZA Memo 143 (rev. Aug 2025), LAMC 12.22 A.33, LADBS bulletin P/BC 2026-150, Mayor's Emergency Executive Orders (listed Oct 2026) and the HCD ADU Handbook (2026). Not legal advice — rules depend on your exact lot. More in our Los Angeles ADU guide.
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 LA
What an ADU costs in Los Angeles
Same all-in price as anywhere in California. LA's own fees are low for small ADUs — most of our models pay no school or impact fees at all.
| Model | All-in price | LAUSD school fee | 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: LADBS Information Bulletin P/BC 2026-150 §X; LAUSD developer fee notice (June 2026); Gov. Code §66311.5. Launch pricing runs through December 31, 2026. Comparison is general — every project differs.
Renting in LA
Renting out an ADU in Los Angeles
average asking rent for all homes in the City of LA — up 24% since 2021. Small, new, private units with their own entrance and laundry are easy to rent.
Zillow Observed Rent Index, City of Los Angeles, Aug 2026 ADU for rental incomeLA's Home-Sharing rules allow stays of 30 days or less only in the host's own home, so plan on long-term tenants for an ADU.
LA's Rent Stabilization Ordinance covers units built before Oct 1978. A new detached ADU generally isn't covered — but adding one can bring an older main house under RSO.
LA's Just Cause Ordinance covers most rentals not under RSO, including newer units, after a tenant's first 6 months or lease term.
Same money, other options
Yearly income per dollar, before taxes and costs. An ADU wins because you already own the land. Full comparison →
Sources: LA City Planning Home-Sharing page; LA Housing Department ADU, RSO and Just Cause pages (2025–2026). Comparison: HUD FY2027 2-bedroom Fair Market Rent, Los Angeles-Long Beach-Glendale area ($2,964) × 12 ÷ $271,900; U.S. Treasury (Oct 6, 2026); FTSE Nareit (Sep 2026); Zillow ZORI ÷ ZHVI, LA metro (Aug 2026); FDIC (Sep 2026). Not legal or investment advice.
Permits in LA
How your LA permit works — we handle it
Free lot check
Zoning, fire & hillside maps, setbacks, sewer and power for your LA address.
Plans & ePlanLA
Our HCD-approved plans plus your site plan, submitted to LADBS through ePlanLA.
City clearances
Bureau of Engineering (sewer), Fire Department access, City Planning zoning — and LADWP when near a utility easement.
Decision in 60 days
State law gives LA 60 days to approve or deny a complete application. Your ADU is built in our factory meanwhile.
Install & move in
Delivered to your LA lot, installed in about a week, inspected — then your Certificate of Occupancy.
Based on LADBS bulletin P/BC 2026-150 (clearances) and ZA Memo 143 (60-day decision, Gov. Code §66317). LADBS also runs a Standard Plan Program of pre-approved ADU plans.
Why now
Start your LA 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.
Los Angeles ADU questions
Read the full LA ADU guide, see all of California, or call (209) 214-6845.
Can I build an ADU on my lot in Los Angeles?
Most LA lots with a single-family home can add at least one ADU. State law guarantees at least an 800 sq ft ADU with 4-foot side and rear setbacks. Fire-zone, hillside and coastal lots have extra rules — we check your address for free.
How much does an ADU cost in Los Angeles?
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. ADUs up to 500 sq ft pay no LAUSD school fee and ADUs under 750 sq ft pay no city impact fees.
How long does an ADU permit take in LA?
State law requires the City of LA to approve or deny a complete ADU application within 60 days. Our ADU is built in the factory at the same time, so most projects take 4–6 months from signing to keys.
Do I need parking for an ADU in Los Angeles?
Often no. No parking is required within half a mile of public transit or in historic districts, and you don't have to replace a garage you convert or demolish.
Can I rent my LA ADU on Airbnb?
Generally not. LA's Home-Sharing rules only allow stays of 30 days or less in the host's primary residence, so ADUs are rented long-term.
Is a new ADU in LA under rent control?
A new detached ADU is generally not covered by LA's Rent Stabilization Ordinance, which applies to units built before October 1978. LA's Just Cause Ordinance can still apply after a tenant's first 6 months.
Can I add an ADU while rebuilding after the 2025 fires?
Yes. LA's Emergency Executive Order 1 fast-tracks ADUs on lots where the home was destroyed, before, with or after the main house is rebuilt. Check the current status of the order for your project.
Free · no obligation
Can you build an ADU on your LA lot?
Send your Los Angeles address. We'll check zoning, fire and hillside maps 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 Los Angeles, 2021–2025, updated Oct 2026); Zillow Observed Rent Index, City of Los Angeles (Aug 2026); LADBS Information Bulletin P/BC 2026-150 and ADU Standard Plan Program; LA City Planning ZA Memo 143 rev. 1 (Aug 2025); LAUSD developer fee notice (June 2026); LA Housing Department RSO, Just Cause and ADU pages; Mayor of Los Angeles Emergency Executive Orders (listed Oct 2026); HCD ADU Handbook (2026). General information, not legal advice. Updated October 2026.