Building an ADU in Long Beach, CA
A city with its own permit counter, its own pre-approved plan catalog — and none of the LADBS queue.
Long Beach ADU key facts
| Who reviews your plans | Long Beach Community Development — an independent counter, NOT LADBS |
| The head start | The city runs a Pre-Approved ADU Program (PAADU): city-vetted designs that cut design and plan-check time |
| State-law floor | 4-ft side/rear setbacks and ministerial approval apply, same as everywhere in California |
| Best fit | Garage conversions and detached units on the city’s older, generous lots |
Homeowners hear “Los Angeles County” and brace for the LADBS experience. Long Beach is the good news: it is an independent city with its own Community Development department, its own counter, and — unusually — its own catalog of pre-approved ADU designs. The city publishes the PAADU program precisely to save owners design time and plan-check rounds, which tells you something about its posture: Long Beach wants these units built.
What’s different about building in Long Beach
The permit path, first. Your application goes to Long Beach’s own Community Development department, not the LADBS queue that city-of-LA projects stand in. Independent counters generally mean shorter lines and reviewers who know their own code — and Long Beach’s published ADU regulations are laid out clearly enough that a complete submittal moves without drama.
Then the PAADU catalog. Long Beach maintains a set of pre-approved ADU designs — pick one and the structural review is largely already done, which compresses both design cost and plan-check time. The trade-off is the same as every pre-approved program: the plans are fixed. If your lot or your needs do not fit the catalog, a custom design through the normal process is still fully available — we price both routes against each other so the catalog is a choice, not a constraint.
The housing stock plays along. Much of Long Beach was built in eras of real backyards and detached garages, which means the two classic ADU plays — the garage conversion and the backyard detached unit — both fit a large share of lots. Coastal-adjacent parcels can carry extra review, which is a lookup we run before design, not after.
What an ADU costs in Long Beach
Our published ranges cover Long Beach the same as the rest of our service area: garage conversions typically $90,000–$150,000, detached units $200,000–$450,000+. The PAADU route can trim the design line-item; the build cost stays the build cost. Full breakdown in the cost guide and the LA hub.
Frequently asked questions
Does Long Beach use LADBS for ADU permits?
What is the Long Beach Pre-Approved ADU Program?
Is a pre-approved plan always the cheaper route?
What does an ADU cost in Long Beach?
Useful links for Long Beach homeowners
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