Pre-approved plans
Guides on this topic, newest first.
- How much an ADU costs in Los Angeles in 2026
There is no single price. The only independent statewide survey of ADU owners, from UC Berkeley's Terner Center in 2021, found a median build cost of $150,000, about $250 per square foot, with 37 percent of ADUs under $100,000 and 71 percent under $200,000. Prices have risen since, and 2026 bids in Los Angeles depend on the kind of ADU, its size and the site. City fees are a small share: no impact fees up to 750 sq ft and no school fees up to 500 sq ft.
Los Angeles County · Updated November 6, 2026 · Vivienda
- How long an ADU permit takes in Los Angeles
State law gives the city 15 business days to tell you in writing whether your application is complete, and 60 days from a complete application to approve or deny it. If the city misses the 60 days, the application is deemed approved. A pre-approved standard plan shortens plan check because LADBS reviews only the site-specific items. Those clocks do not include your design time, agency clearances or construction.
Los Angeles County · Updated November 6, 2026 · Vivienda
- How Los Angeles pre-approved ADU plans work
LADBS checks a firm's plan against the building, residential, green and energy codes once, so when you use it the city reviews only how it sits on your property: zoning, the foundation for your soil and clearances. ADUCheck lists 30 standard ADU plans from the LADBS program, from 280 to 1,200 sq ft, plus three free county plans for unincorporated areas. You buy a private firm's plan set from the firm; the county-owned plans are free.
Los Angeles County · Updated November 6, 2026 · Vivienda