Accessory Dwelling Units (ADUs)

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What are they?

An accessory dwelling unit (ADU) is a smaller, independent residential dwelling unit located on the same lot as a stand-alone (i.e., detached) single-family home. ADUs go by many different names throughout the U.S., including accessory apartments, secondary suites, and granny units. ADUs can be converted portions of existing homes (i.e., internal ADUs), additions to new or existing homes (i.e., attached ADUs), or new stand-alone accessory structures or converted portions of existing stand-alone accessory structures (i.e., detached ADUs).

Internal, attached, and detached ADUs all have the potential to increase housing affordability (both for homeowners and tenants), create a wider range of housing options within the community, enable seniors to stay near family as they age, and facilitate better use of the existing housing fabric in established neighborhoods. Consequently, many cities and counties in the San Francisco Bay Area have signaled support for ADUs in their plans and adopted zoning regulations that permit ADUs.

Want to find out more?

Take a look at your county and/or city regulations to find out if your lot qualifies, then give us a call and let us help walk you through the permit process.

ADU Rules by City: