Client Assistance Memos (CAMs)
CAM 116B, Establishing a Backyard Cottage (Detached Accessory Dwelling Unit)
This Client Assistance Memo (CAM) explains the requirements and process for establishing a detached accessory dwelling unit (also called a DADU or mother-in-law unit) on an owner-occupied Single Family zoned lot in southeast Seattle. Legislation allowing detached accessory dwelling units (DADUs) is in effect as of Sept. 14, 2006. DADUs are authorized only in Southeast Seattle, defined as the area south of Interstate 90 and east of Interstate 5. DADUs are not permitted in lots located in the shoreline districts. Legislation allowing attached accessory dwelling units (ADUs) in single family homes citywide became effective Dec. 1, 1994. Please see CAM 116A, Establishing an Attached Accessory Dwelling Unit, for rules and information about ADUs.

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Related Info:
A Guide to Building Backyard Cottages in Southeast Seattle
A technical guide to assist homeowners building a backyard cottage, jointly developed by the Seattle Planning Commission and DPD.

Date Revised:  04/22/2008