Yes, an attached garage can be converted into a Junior Accessory Dwelling Unit (JADU). A JADU is a type of Accessory Dwelling Unit (ADU) that's no larger than 500 square feet.
Requirements for JADUs
- Must be within a single-family home or attached accessory structure
- Must have a separate exterior entrance
- Must not have an interior entry to the main house
- Must have its own separate kitchen
- Must meet "efficiency kitchen" requirements
- May share a bathroom with the single-family home
Other considerations
- The exterior design must be architecturally compatible with the residential structure
- The property owner must record a deed restriction
- The owner must occupy the primary dwelling or the JADU
- Long-term renting of either the JADU or the primary dwelling unit is allowed