Overview
A Detached ADU is a residential dwelling unit that provides complete independent living facilities for one or more persons and the unit is detached from the primary structure It shall include permanent provisions for living, sleeping, eating, cooking and sanitation.
AT A GLANCE
| Maximum Size | Local ordinance can limit, but must allow 850 sq ft for a Studio/1 bedroom and 1000 sq ft for 2+ bedrooms. State maximum size for detached is 1200 square feet unless converting existing space which would have no miximum. |
| Lot Size | No minimum lot size requirements for an existing legal lot. Any newly created lot must comply with local zoning regulations. |
| Kitchen | Full |
| Height Limit | State law does not restrict but local ordinance must allow at least 16'. |
| Bathroom | Toilet, Shower, Sink |
| Occupancy | Owner occupancy is not required for permitting |
| Side and Rear Setbacks | Minimum 4 feet. Front yard setbacks as required by local ordinance. Setback requirements are waived for ADUs converted from existing accessory structures. |
| Development and Impact Fees | ADUs 750 sq ft and smaller are not subject to impact fees by law. Over 750 sq ft they shall be prorated and proportional for the property. |
| Homeowners Associations | An HOA must allow construction on separate interest properties. HOAs cannot restrict homeowner from renting out ADU as long as the term is for 30 days or more. |
| Solar Panels | Title 24 Energy Code requires solar panels on all new construction, excluding Manufactured HUD Homes. |
| Ingress/Egress | Must have separate entrance. Up to additional 150 sq ft to size limit only if for the purpose of adding ingress/egress. |
| Fire Sprinklers | It’s essential to consult with your local building department to confirm the specific requirements for fire sprinklers in your ADU project. Fire safety regulations can vary significantly based on your location. |