Can I put an ADU in my garage?

Homeowners can convert legally built structures (garage, barn, art studio, etc.) into an ADU or JADU. JADUs can be converted from an attached garage (but not detached). Check out this extensive guide to garage conversion ADUs from the Casita Coalition.

You do not need to replace the parking space if converting the garage to an ADU, but you may need to replace it if converting to a JADU – confirm with local staff. Demolition permits for an existing detached garage can be processed at the same time as the ADU permits. Note that garage conversion ADUs may require significant moisture barriers and other design elements in order to meet building codes.