What are the setbacks for an ADU?

If you are building a new ADU that will be detached from the main residence or building(s), the ADU needs to be at least 4 feet from the side and rear property lines and maintain the front yard setback required in the zone of the property. (See Example Illustration).

A minimum 10-foot separation is needed between the new ADU and the main residence or other structures.

Setbacks do not apply when converting an existing accessory structure, like a garage, pool house, or detached recreation room into an ADU. Enlarging or modifying an existing structure for an ADU would require meeting the setbacks.

An ADU that is attached to the main residence must follow the same setbacks as the main residence. 

Example Site Plan

site plan


Show All Answers

1. What is an ADU/JADU?
2. Can I have an ADU on my property?
3. How many ADUs can I have on my property?
4. How big can an ADU/JADU be?
5. Do I need to get a building permit for an ADU?
6. What are the setbacks for an ADU?
7. Can I convert my garage into an ADU?
8. What is the maximum height of an ADU?
9. Do I need to provide parking for the ADU?
10. Am I required to pay impact fees (e.g. sewer, water, school district) for an ADU?
11. Can zoning regulations, like the Hillside Height Overlay, prevent me from building an ADU?
12. Does my ADU have to match the design of my house?
13. Are ADUs allowed in high fire hazard areas?
14. What is the first step I need to take to get an ADU?