Planning 2017-10-26 ITEM 4 - ACCESSORY DWELLING UNIT REGULATION - STAFF REPORT

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City of Tukwila Department of Community Development - Jack Pace, Director Allan Ekberg, Mayor STAFF REPORT TO THE PLANNING COMMISSION PREPARED OCTOBER 18, 2017 FILE NUMBERS: L17-0067 ADU Code Amendments REQUEST: Review and revise Tukwila's accessory dwelling unit (ADU) regulations, hold a public hearing and make a recommendation to the City Council. LOCATION: City wide PUBLIC NOTICE: Hearing notice was published in the Seattle Times 10/12/17. A postcard was mailed to the owners and tenants of LDR Zoned parcels. An email was sent to the interested parties list. STAFF: Nora Gierloff, Deputy DCD Director ATTACHMENTS: A. Revising city regulations to encourage accessory dwelling units — MRSC Homelessness and housing toolkit for cities B. Comparison of City ADU Standards C. ADU Survey Responses D. Detached ADU Examples BACKGROUND In March the City Council held a Housing Policy Work Session and considered a variety of housing related actions. One of the items that the Council prioritized for policy consideration was an update to Accessory Dwelling Unit (ADU) zoning standards to be followed by an amnesty program for existing units. The intention was to create additional housing options and address the life safety issues in the many illegal ADU conversions in the City. Tukwila's current standards for ADUs are: • Minimum lot size of 7,200 square feet (larger than the Low Density Residential standard of 6,500), • The ADU is no more than 33% of the square footage of the primary residence and a maximum of 1,000 square feet, whichever is less, • One of the residences is the primary residence of a person who owns at least 50% of the property, Tukwila City Hall • 6200 Southcenter Boulevard • Tukwila, WA 98188 • 206-433-1800 • Website: TukwilaWA.gov 9