An Accessory Dwelling Unit (ADU) is a small, self-contained residential unit built on the same lot as an existing single family home. Often referred to as a mother-in-law apartment, examples of ADUs include an apartment over a garage, a basement apartment, and an addition to an existing home.
An ADU adds an additional dwelling unit – a separate living quarters with its own kitchen and bathroom – to an existing property. This differs from a home addition which only adds to the home, such as an additional bedroom or living room, rather than creating a new, separate unit.
ADU’s are allowed in the residential zones if they comply with specific criteria adopted to ensure that the new units fit with the neighborhood and do not take away from the character of Tukwila’s residential areas. One requirement is that the ADU is incorporated into the primary single-family residence, not a separate unit.
In the fall the City Council will consider if backyard cottages should be allowed and other changes to the ADU regulations. The City wants to know your opinion and has posted an online survey: www.SurveyMonkey.com/r/V6R5JJF. Please take a moment and share what you think.
For more Information, contact the Department of Community Development at 206- 431-3670 or visit their offices at 6300 Southcenter Boulevard, Suite 100, open Monday through Friday from 8:30am to 5:00pm.