Building a Multigenerational ADU in Los Angeles
LA is the largest ADU-permitting jurisdiction in California. LADBS has fully digitized submittals and enforces the statewide 60-day approval clock.
Best for
Whether you're in Boyle Heights, Mid-City, or Sylmar, the same statewide protections apply. The details are what change.
Multigenerational home guide →What makes Los Angeles different
- State law guarantees an 800 sq ft ADU on virtually every single-family lot in the city.
- LADBS ePlan submittal is now the default — no more paper drops downtown.
- Impact-fee exemption for ADUs under 750 sq ft saves $15K–$30K on almost every project.
Zoning note: Neighborhoods vary widely in setback, height, and coastal-zone rules. A pre-submittal zoning check is the single highest-ROI hour of the project.
Before you sign anything in Los Angeles, read our guides on how to choose an ADU contractor and read a bid and ADU financing options in California. If you'd rather have someone do it with you, here's how our free ADU advocacy works.
Free ADU advocacy for Los Angeles families
We shortlist vetted Los Angeles ADU builders, compare their bids honestly, and walk you through financing. You pay nothing — contractors pay us only if you move forward with one.
Book a free Los Angeles consultation