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N <br />City <br />Min. Lot Size Max. Unit Size <br />Height <br />Parking Requirement <br />Owner <br />Occupancy <br />Other Regulations <br />Fees <br />Burien <br />Attached <br />and <br />Detached <br />Same as <br />Zone. ADU <br />footprint no <br />more than Attached 1000 SF <br />15% of the Detached 800 SF, <br />total lot area Exceptions <br />or 80% of the possible for <br />main buildings at least <br />residence 5 years old <br />Lower of 10ft <br />above the <br />height of the <br />primary <br />existing <br />structure or <br />the max <br />allowed in the <br />zone <br />1 additional parking <br />space is required. <br />Parking should be on <br />the side or rear of the <br />building. <br />Required, <br />signed and <br />recorded <br />affidavit <br />Only 1 entrance per street front unless <br />hidden. Designed to match main building. <br />Non -conforming ADU's can apply to become <br />legal ADU's if they meet all requirements set <br />fourth in the BMC. No impact fees for ADUs. <br />None <br />Seattle (in SF Zone) <br />Attached Same as zone 1,000 sf <br />NA <br />1 for main house, 1 for <br />ADU, waiver is possible <br />Required, <br />signed <br />covenant <br />Max 8 residents on site unless all related. No <br />public comment period on application or <br />appeal allowed. <br />Duplex building standards for sound and fire <br />separation if new construction, Only 1 visible <br />entrance per street, Sewer capacity charge <br />for new connections. <br />$210 + <br />plan <br />review <br />fee <br />based <br />on value <br />of work <br />Detached <br />4,000 800 sf <br />1 for main house, 1 for <br />ADU, waiver is possible <br />Required, <br />signed <br />covenant <br />Entrance can't face nearest side yard or rear <br />unless on an alley. Not allowed in the <br />shoreline. Must pay sewer capacity charge. <br />Portland <br />Attached <br />smaller of 3/4 sf <br />of main house or <br />Same as zone 800 sf <br />NA <br />No additional for ADU <br />No <br />1 or more related persons plus up to 5 <br />additional persons, Some utility hook up and <br />impact fees reduced or waived <br />Only 1 entrance on street fagade <br />smaller of 3/4 sf <br />of main house or <br />Detached Same as zone 800 sf <br />20' height <br />No additional for ADU <br />No <br />Smaller footprint than main house, 40' <br />setback from front lot line or behind the <br />house, design to match main house, Duplex <br />building standards if new construction <br />