Accessory Dwelling Units (ADUs)
Accessory dwelling units go by many names, such as ADUs, in-law units, granny flats, and casitas.
An ADU is an attached or detached residence located on the same lot as a single-family home. ADUs are separate, complete residences with their own kitchens, bedrooms, bathroom, and entrances.
ADU Basic Information:
- Up to two ADUs permitted on lots with a detached single-family residence, in the following configurations:
-
- Two attached ADUs, such as in a basement, above an attached garage, or home addition
- Two detached ADUs, which may be attached to each other or a detached garage
- One attached ADU and one detached ADU
- A conversion of an existing structure into an accessory dwelling unit
- A detached ADU can be a maximum of 1,000 square feet.
- An attached ADU can be up to 50% of size of the single-family residence or 1,000 square feet, whichever is larger.
- ADUs do not count towards the Floor Area Ratio (FAR) of the single-family residence.
- No additional parking is required when the property already has four or more parking spaces (which includes garage space and the driveway).
Option 1: Detached ADU Development Standards by Zone (only when ADU is not attached to another structure or improvement, such as garage or shed)
|
Development Standard |
R-1 |
R-4 |
R-6 |
R-8 |
R-12 |
R-18 |
|
Front setback* |
20 ft. |
15 ft. |
15 ft. |
10 ft. |
10 ft. |
10 ft. |
|
Rear setback |
5 ft. |
5 ft. |
5 ft. |
5 ft. |
5 ft. |
5 ft. |
|
Side setback |
5 ft. |
5 ft. |
5 ft. |
5 ft. |
5 ft. |
5 ft. |
|
Height |
24 ft. |
24 ft. |
24 ft. |
24 ft. |
24 ft. |
24 ft. |
*Front setback along arterial streets is a minimum of 30 feet.
Option 2: Other Structure Development Standards by Zone (required when ADU is attached to other structure, like a garage)
|
Development Standard |
R-1 |
R-4 |
R-6 |
R-8 |
R-12 |
R-18 |
|
Front setback* |
20 ft. |
15 ft. |
15 ft. |
10 ft. |
10 ft. |
10 ft. |
|
Rear setback |
10 ft. |
10 ft. |
10 ft. |
10 ft. |
5 ft. |
5 ft. |
|
Side setback |
10 ft. |
10 ft. |
10 ft. |
10 ft. |
5 ft. |
5 ft. |
|
Height |
35 ft. |
35 ft. |
35 ft. |
35ft. |
35 ft. |
35 ft. |
*Front setback along arterial streets is a minimum of 30 feet.