Overview of ADU Regulations

Accessory dwelling units (ADUs) are allowed on any parcel where the zoning district or General Plan allows residential uses, and there is an existing or proposed primary dwelling. ADUs can be attached or detached from the primary dwelling, new construction or converted from existing space, and can be standard or junior ADUs. For more information see Types of ADUs.

State Laws in Effect

Key Considerations

Permits Required

Number of ADUs Allowed

ADU Size


Building Envelope


Alternatives to ADUs