Accessory Dwelling Units

What is an ADU?

An attached or detached dwelling unit which provides complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking, and sanitation on the same parcel as an existing dwelling unit is situated. An accessory dwelling unit may also include an efficiency unit, as defined in Section 17958.1 of the California Health and Safety Code and a manufactured home, as defined in Section 18007 of the Health and Safety Code. An accessory dwelling unit may be established through: (i) construction of a new detached structure; (ii) construction of an addition to an existing single-family dwelling; (iii) conversion of existing space in an existing single-family dwelling; or (iv) conversion of an existing garage or other accessory structure on a lot containing an existing single-family dwelling, provided it is set back at a distance sufficient for fire safety.

How to Apply

For information regarding submittal requirements for an Accessory Dwelling Unit, please click here. Any additional property specific questions, please contact the Planning Division by phone at (714) 548-3247 or email at