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ADU permit cost by city: compare fees in Los Angeles, San Diego, San Jose and Sacramento, what is exempt and how to estimate your total.

ADU permit timeline in California: 15 business days for completeness, 60 days to decide. See what the data shows about real delays.

Sacramento ADU rules on size, setbacks, height and impact fees, with the city’s local limits next to the state minimums. Updated Oct 2026.

San Jose ADU requirements for size, height, setbacks, parking and permits, based on the 2021 ordinance. Confirm with the city first.

San Diego ADU rules: setbacks, parking and fees explained from the city’s Information Bulletin 400 (January 2026). Check what applies.

Los Angeles ADU rules: allowed sizes, 4-foot setbacks, parking exemptions, fees and the 60-day permit clock, from city and state sources.

ADU laws by state: which states let you build by right? Compare California, Washington, Oregon, Colorado, Arizona and more, with sources.

Build an ADU on your property? Check state law, zoning, lot rules, HOA limits and permits in five steps. Start with your state.

California ADU laws for 2026: sizes, setbacks, fees, parking, owner occupancy and permit deadlines, with sources from HCD and the statutes.