Accessory Dwelling Units
What is an Accessory Dwelling Unit (ADU)?
An Accessory Dwelling Unit (ADU) is an attached or detached residential unit that provides complete independent living facilities, including a bedroom, kitchen, and bathroom. A Junior Accessory Dwelling Unit can be no larger than 500 square feet and is contained entirely within an existing single-family home. A junior ADU may include its own bathroom, or share with the existing home.
Only one ADU or junior ADU is allowed on a lot, and only if the lot contains an existing or concurrently approved single-family home in the A, R-1, or HR zoning districts. The owner of the lot containing the ADU or junior ADU must also live on the lot. ADUs may be rented, but cannot be sold separately from the main home.
The construction of an ADU or creation of a junior ADU are processed over-the-counter and without a public hearing, subject to approval of a building permit. However, ADUs that result in the following will require design review prior to building permit submittal:
- A new multi-story main structure or multi-story accessory structure
- The conversion of a single-story structure to a multi-story structure
- A new structure over 18 feet in height or an existing structure that would exceed 18 feet in height as a result of the proposed construction
- A project that increases the cumulative floor area of all structures on a site to more than 6,000 square feet
- A project located within the Pmw, Pd, or Pdf areas as identified on the City's Ground Movement Potential Map
Legalization of Existing ADUs
ADUs and junior ADUs that were established within a permitted structure between August 18, 1984 and February 19, 2003 may apply for legalization with reduced development standards.
Summary of ADU Development Standards
Floor Area and Site Coverage