City Rules
Find city-specific ADU information, local planning requirements, and official resources for California cities.
Last updated: March 2026
California has a statewide ADU framework that all cities must follow. However, local governments implement these rules and manage the permit process. This means that while state law creates a baseline, your specific city may have additional local standards, different fee structures, varying permit timelines, or unique local requirements that affect your ADU project.
If your city is listed below, you can dive directly into local ADU details. If your city isn't covered yet, the research tips at the bottom of this page will help you find your local rules.
California cities with ADU rules
Los Angeles
Los Angeles County
California's largest city with specific ADU ordinances and streamlined programs
Pasadena
Los Angeles County
Local ADU standards with historic district considerations
Glendale
Los Angeles County
City-specific ADU guidelines within the San Gabriel Valley
San Diego
San Diego County
ADU-friendly policies with companion unit programs
San Jose
Santa Clara County
Silicon Valley ADU rules with specific local standards
Sacramento
Sacramento County
State capital with active ADU development policies
More cities coming
This site is expanding coverage of California cities over time. If your city isn't listed yet, you can research your local ADU rules using the steps below. We're actively adding more city guides—check back soon.
How to research your own city's ADU rules
Even if your city isn't covered yet, you can find local ADU rules yourself. Here's how:
- 1Identify your city's planning or building department. Search for '[Your City] planning department' or '[Your City] building department' online.
- 2Look for an ADU page or guideline document. Most city planning departments have begun publishing ADU-specific information on their websites.
- 3Check the municipal code for zoning and development standards. City ordinances are usually available online; search for 'ADU' or 'accessory dwelling unit' in your city's code.
- 4Review your property's zoning designation. Many cities have zoning maps online. Knowing your zone (R-1, R-2, etc.) helps you understand which rules apply to your property.
- 5Contact the planning department directly. Staff can clarify local rules, answer questions about your specific property, and tell you what documentation you'll need to apply.
- 6Ask about pre-approved plans or streamlined programs. Some cities offer standard plans or expedited review processes that can reduce timeline and planning costs.
Local ADU rules, city implementation details, and code requirements can change. Always verify current requirements directly with your city's planning department and qualified professionals. This page provides general educational information only.
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