Frequently Asked Questions

Both ADUs and Junior ADUs (JADUs) must be on a permanent foundation and have a separate entrance, a kitchen facility, and living area that is separate from the primary dwelling unit. However, a JADU only requires a smaller "efficiency kitchen". An ADU must have its own bathroom, while a JADU may have its own bathroom or share the bathroom in the primary dwelling unit. ADUs are allowed on lots with multifamily or single-family dwellings, while JADUs are only allowed on lots with single-family dwellings. ADUs may be conversions of existing space, attached or detached, while JADUs are only allowed as conversions of existing space. The maximum size of a JADU is 500 square feet, while the maximum size of an ADU is 850 square feet for studios and 1-bedroom units and 1,000 square feet for multi-bedroom units.

The City maintains a Zoning Map (PDF), which designates zoning districts throughout the City. In addition, zoning district information explaining your setback and site coverage requirements are in the "Development Standards" section of the City's Zoning Code. These requirements can be found in Section 17.10.020, Development Standards Table. See Zoning and Allowed ADU Types (PDF).

ADUs can be built by-right in any zone that allows residential uses. ADUs are not subject to lot size requirements, density limitations, or growth-control measures. JADUs can be built within an existing or proposed single-family dwelling by-right in any zone that allows single-family residential uses. This is subject to different rules and requirements depending on the zone.  

See the ADU Development Standards flyer for a summary of requirements for each type of ADU.   

ADUs must adhere to the lot coverage requirements prescribed by the underlying zoning for the lot. Additionally, for ADUs larger than 800 square feet, the ADU together with the primary residence cannot cover more than 50 percent of the lot area.  However, ADUs of 800 square feet or less are not subject to maximum lot coverage requirements. Internal conversions are exempt from lot coverage requirements. 

For JADUs, the owner must record a deed restriction that requires the owner to occupy either the primary dwelling or the JADU. There are no owner occupancy requirements for other ADUs. 

An existing garage can be converted into an ADU or JADU by making the garage space livable in accordance with applicable California Residential Code standards. At minimum, a garage conversion ADU or JADU must include cooking facilities, heating, sanitation (JADUs may use primary dwelling), hot and cold water, separate entrances, fireproofing (ADU), egress window, vapor barrier, and fire sprinklers where applicable. Email the City Building Division to determine the requirements for building an ADU or JADU in a garage.