23.45.508

A. Except for structures related to an urban farm, a structure occupied by a permitted use other than a residential use may be partially or wholly converted to a residential use even if the structure does not conform to the development standards for residential uses in multifamily zones. B. Expansions of nonconforming converted structures and conversions of structures occupied by nonconforming uses are regulated by Sections 23.42.108 and 23.42.110 . C. Assisted living facilities, congregate residences, nursing homes, and structures containing ground floor commercial uses as allowed by Chapter 23.46 in RC zones shall meet the development standards for stacked dwelling units unless otherwise specified. D. Lots with no street frontage. For purposes of structure width, depth, and setbacks, multifamily zoned lots that have no street frontage are subject to the following: 1. For lots that have only one alley lot line, the alley lot line shall be treated as a front lot line. 2. For lots that have more than one alley lot line, the Director shall determine which alley lot line shall be treated as the front lot line. 3. For lots that have no alley lot lines, the applicant may choose the front lot line provided that the selected front lot line length is at least 50 percent of the width of the lot. E. Any other provision of the Seattle Municipal Code notwithstanding, an applicant is not entitled to a permit for any use or development on a lot in an LR zone that would be inconsistent with any term, condition, or restriction contained either in any recorded agreement that is in effect as to that lot and was made in connection with a rezone of the lot to LDT, L1, L2, L3, or L4, or in any City Council decision or ordinance related to a rezone of the lot to LDT, L1, L2, L3, or L4 conditioned on a recorded agreement prior to April 19, 2011. F. If more than one category of residential use is located on a lot, and if different development standards apply to the different categories of use, then each category's percentage of the total limit imposed by the development standard shall be calculated based on each category's percentage of total structure footprint area, as follows: 1. Calculate the footprint, in square feet, for each category of residential use. For purposes of this calculation, "footprint" is defined as the horizontal area enclosed by the exterior walls of the structure. 2. Calculate the total square feet of footprint of all categories of residential uses on the lot. 3. Divide the square footage of the footprint for each category of residential structure in subsection 23.45.508.F.1 by the total square feet of footprints of all residential uses in subsection 23.45.508.F.2. 4. Multiply the percentage calculated in subsection 23.45.508.F.3 for each housing category by the area of the lot. The result is the area of the lot devoted to each housing category. 5. The total limit for each category of residential use is the applicable limit for that use multiplied by the percentage calculated in subsection 23.45.508.F.4. G. Unless otherwise specified, the development standards of each zone shall be applied in that zone, and may not be used in any other zone, except that if both zones have the same development standards, the development standard shall be applied to the lot as a whole. If a lot or development site includes more than one zoning designation and a development standard is based on lot area, the lot area used in applying the development standard shall be the portion of the contiguous area with the corresponding zoning designation. (Ord. 127376 , § 34, 2025; Ord. 127098 , § 3, 2024; Ord. 126682 , § 1, 2022; Ord. 125791 , § 32, 2019; Ord. 125558 , § 8, 2018; Ord. 124843 , § 19, 2015; Ord. 124608 , § 6, 2014; Ord. 124378 , § 26, 2013; Ord. 123495, § 27, 2011; Ord. 123378, § 13, 2010; Ord. 123209, § 20, 2009.)