Lot coverage in the UM Environment
Seattle Mun. Code § 23.60A.508
in effectA. Waterfront lots. On waterfront lots, the following requirements apply: 1. Structures, including floats and piers, shall not occupy more than 50 percent of the submerged portion of a waterfront lot, except as modified by subsection 23.60A.508.C; 2. Structures shall not occupy more than 75 percent of the dry land portion of a waterfront lot. B. Upland lots. The lot coverage limits of the underlying zone shall not be exceeded. C. Lot coverage exceptions 1. Structures, including floats and piers, may occupy up to 65 percent of the submerged portion of a waterfront lot where the depth of the dry land of all the waterfront lot area is less than 50 feet measured from the OHW mark to the landward waterfront lot line. 2. Dry docks may cover up to an additional 25 percent of submerged land for a maximum lot coverage of 75 percent of all uses combined. (Ord. 124750 , § 55, 2015; Ord. 124105 , § 3, 2013.)
Source: Seattle Municipal Code (Municode library)URL: https://library.municode.com/wa/seattle/codes/municipal_codeFetched: 7/25/2026