Local ADU Rules
Select your county for important details
How do local ADU rules work? Each county has a set of rules for building an ADU. These rules must match the state’s rules for ADUs. Keep in mind that if you live in an incorporated city or town, then you will follow the rules of that location.
Click on the links below to learn about the local rules that govern ADUs where you live. Once you know what you can build, contact your County to ask questions and clarify your plans.
IMPORTANT: Confirm all details with local staff while planning your ADU.
Choose your county
Amador County
Calaveras County
Nevada County
Mariposa County
