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Comparison of Accessory Dwelling Unit Standards <br />City Min. Lot Size Max. Unit Size Height <br />Parking Requirement <br />Owner <br />Occupancy <br />Other Regulations <br />Fees <br />Tukwila <br />Attached <br />Only <br />smaller of 1/3 sf <br />of main house or <br />7,200 1,000 sf <br />NA <br />2 for main house, 1 for <br />ADU up to 600 sf, 2 for <br />ADU over 600 sf <br />Required <br />Incorporated into the primary single-family <br />residence so that both units appear to be of <br />the same design as if constructed at the <br />same time, Not sold as a condo, Detached <br />not permitted <br />None <br />Renton <br />Attached <br />and <br />Detached <br />smaller of 3/4 sf 30', but no <br />of main house or taller than <br />Same as zone 800 sf main house <br />2 for main house, 1 for <br />ADU <br />Required, <br />signed <br />affidavit, <br />notice on title <br />Conditional Use Permit, match main house, <br />Max 50 allowed per year in City, meet <br />impervious surface and building coverage <br />Admin <br />CUP <br />$1,500 <br />Kent <br />Attached <br />and <br />Detached <br />Specific zoning <br />requirements of <br />each zone. ADU <br />in new <br />development <br />limited to 800 sf <br />or 33% of the <br />same as Zone principal home <br />23' but not to <br />exceed the <br />height of the <br />principal <br />building <br />2 for main house, 1 for <br />ADU <br />1 unit must be <br />owner <br />occupied for 6 Immediate neighbors of an ADU applicant <br />months of the will be notified of the pending ADU permit <br />year, Recorded within 15 days of the application being <br />covenant deemed complete. <br />Planning <br />Review <br />$93 <br />SeaTac <br />Attached <br />and <br />Detached <br />Attached <br />NEW: 800 SF <br />EXISTING: 45% of <br />Same as the principal <br />Zone. 1 ADU home <br />per lot Detached 800 SF <br />20' <br />Parking for main house <br />by zone, 1 for ADU up <br />to 600 sf, 2 for ADU <br />over 600 sf <br />Must occupy <br />for at least 9 <br />months, <br />affidavit and <br />documentatio <br />n of residency <br />required. <br />ADU must be registered with the City of <br />SeaTac. Occupancy limit of 2 people for 440 <br />SF, 3 people for 600 SF, 4 people for 800 SF. <br />Waiver for additional parking requirements <br />can be granted if adequate street parking is <br />available. Impact fee is 60% of SF rate. <br />$129 <br />