Prefab ADUs in Long Beach
About half of all new homes permitted in Long Beach are ADUs — and the City follows California's ADU law directly, with no extra local layer. 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 Long Beach — key facts for 2026
Most Long Beach homeowners can add a detached ADU of up to 800 sq ft under state ADU law, with no impact fees under 750 sq ft and no parking near transit. 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 Long Beach?
- Yes, on most single-family lots. Long Beach applies state ADU law: a detached ADU up to 800 sq ft, 16 ft tall (18 ft near major transit), with 4-ft side and rear setbacks.
- How long does a Long Beach ADU permit take?
- ADUs are approved ministerially with a building permit; state law requires a decision within 60 days of a complete application. Coastal and historic sites add an administrative permit with no hearing.
- What fees does Long Beach charge?
- No impact fees under 750 sq ft (state law). Long Beach Unified's school fee (up to $5.38 per sq ft in 2026) applies only to ADUs over 500 sq ft.
- How much does a prefab ADU cost in Long Beach?
- Bay Modular: $124,900–$271,900 all-in, the same price as anywhere in California, permits and installation included.
- How many ADUs does Long Beach build?
- 644 ADU permits in 2025 — about half of all new homes permitted in the city, and over 3,000 since 2021.
- What does an ADU rent for in Long Beach?
- Average asking rent in Long Beach was $2,422 a month in August 2026 (Zillow), up 27% since January 2021.
Sources: HCD APR 2025, Long Beach Planning ADU Bulletin IB-PZ-001, Long Beach Unified developer fees, Zillow ZORI Aug 2026. Last reviewed October 2026.
Long Beach in numbers
In Long Beach, every second new home is an ADU
Long Beach issued 3,015 ADU permits from 2021 to 2025 — in 2025, 644 of 1,218 new homes permitted were ADUs.
ADU permits issued in the City of Long Beach
Source: California HCD Annual Progress Report data (Table A2), City of Long Beach, permits issued per year. Percent = ADUs among all housing units permitted in the city that year.
average Long Beach asking rent since January 2021 ($1,911 → $2,422)
Zillow Observed Rent Index, City of Long Beach, Aug 2026ADU permits issued in Long Beach in five years (2021–2025)
HCD APR data, 2021–2025Can I build in Long Beach?
Most Long Beach lots with a house can add an ADU
Long Beach has no local ADU ordinance yet, so state ADU law applies directly. Here is what matters for most homeowners:
A detached new ADU can be up to 800 sq ft under state law — all our models fit. Conversions of existing space have no size limit.
4 ft from side and rear lot lines (rear measured to the alley centerline); 16 ft tall, or 18 ft within half a mile of major transit.
No parking within half a mile of transit, in historic districts, in the Parking Exempt Area or for conversions — which covers much of the city.
One detached ADU, one conversion ADU and one JADU on a single-family lot.
Coastal Zone lots add an administrative Local Coastal Development Permit; historic sites a Certificate of Appropriateness — no public hearing.
Long Beach runs a Pre-Approved ADU Program (PAADU) — we use our own HCD-approved designs.
Based on the City’s Planning ADU Bulletin IB-PZ-001 (state ADU law; a new local ordinance is in progress). 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 Long Beach
What an ADU costs in Long Beach
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; Long Beach Unified School District developer fees. Launch pricing runs through December 31, 2026. Comparison is general — every project differs.
Renting in Long Beach
Renting out an ADU in Long Beach
average asking rent for all homes in Long Beach — up 27% since 2021. HUD's 2027 fair rent for a 2-bedroom in the area is $2,964.
Zillow Observed Rent Index, City of Long Beach, Aug 2026 · HUD FY2027 FMR ADU for rental incomeA JADU can't be rented for less than 30 days, and Long Beach regulates short-term rentals separately — long-term tenants are the safe plan.
Owner occupancy applies only to a JADU that shares a bathroom with the main house.
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: Long Beach Planning ADU Bulletin IB-PZ-001; Gov. Code §66333; Civil Code §1947.12. 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 Long Beach
How your Long Beach permit works — we handle it
Free lot check
Zoning, coastal and historic status, parking exemption, sewer and power for your Long Beach address.
Plans & submittal
Our HCD-approved plans plus your site plan — a complete building-permit package, as the City requires.
City review
Ministerial plan check under state law; coastal or historic sites file their administrative permit at the same time.
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, installed in about a week, inspected, then your Certificate of Occupancy.
Based on the City’s Planning ADU Bulletin IB-PZ-001 and Gov. Code §66317. Long Beach also runs a Pre-Approved ADU Program (PAADU).
Why now
Start your Long Beach 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.
Long Beach ADU questions
Read our ADU guides, see all of California, or call (209) 214-6845.
Can I build an ADU on my lot in Long Beach?
Most Long Beach single-family lots can add a detached ADU of up to 800 sq ft and 16 ft tall under state ADU law, with 4-foot side and rear setbacks, plus a conversion ADU and a JADU. We check your address for free.
How much does an ADU cost in Long Beach?
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. No impact fees under 750 sq ft, and school fees only above 500 sq ft.
How long does an ADU permit take in Long Beach?
ADUs are approved ministerially with a building permit, and state law requires a decision within 60 days of a complete application. Your ADU is built in our factory at the same time, so most projects take 4–6 months from signing to keys.
Do I need parking for an ADU in Long Beach?
Usually not. No parking is required within half a mile of transit, in historic districts, in the City's Parking Exempt Area or for conversions. We check your lot.
Can I build an ADU in the Long Beach Coastal Zone?
Yes. Coastal Zone ADUs need an administrative Local Coastal Development Permit, filed with the building permit — no public hearing.
Does Long Beach have its own ADU ordinance?
Not yet. Until a new local ordinance is adopted, Long Beach reviews ADUs under state ADU law, as summarized in its Planning ADU Bulletin.
Can Bay Modular deliver to Long Beach?
Yes. We build in our Lathrop factory and deliver statewide at the same all-in price, including Southern California.
Is an ADU a better investment than a rental property in Long Beach?
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 LA-Long Beach area ($2,964) earns about 13.2% a year on its price before costs, vs. about 3.7% for a typical LA-metro rental home (Zillow, Aug 2026). Not investment advice.
Free · no obligation
Can you build an ADU on your Long Beach lot?
Send your Long Beach address. We'll check zoning, coastal and historic status, parking 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 Long Beach, 2021–2025, updated Oct 2026); Zillow Observed Rent Index, City of Long Beach (Aug 2026); HUD FY2027 Fair Market Rents (Los Angeles-Long Beach-Glendale); City of Long Beach Planning ADU Bulletin IB-PZ-001 and Pre-Approved ADU Program; Long Beach Unified School District developer fees. Prices: Bay Modular, October 2026. Not legal advice.