Landmark structures
Seattle Mun. Code § 23.42.118
in effectA. Except as provided in subsection 23.42.118.C, landmark structures may be expanded even if the expansion increases the extent of nonconformity, when the Landmarks Board determines that there is no feasible alternative that meets the development standards of the zone while preserving the integrity of the landmark structure. B. The Director may permit the proposed expansion if it is approved by the Landmarks Board and if: 1. The expansion does not have a significant adverse effect on the light, air, solar, and visual access of properties within a 300-foot radius; and 2. The expansion does not adversely affect the pedestrian environment in the vicinity. C. The Seattle Asian Art Museum building located in Volunteer Park may be expanded as provided in subsection 23.42.106.D.3. (Ord. 125518 , § 2, 2018; Ord. 120293 , § 1, 2001.)
Source: Seattle Municipal Code (Municode library)URL: https://library.municode.com/wa/seattle/codes/municipal_codeFetched: 7/25/2026