Seattle, WA Historic Preservation: HPOZ Rules (2026)

Historic Preservation — We work with community members to designate and preserve districts, sites, and objects of historic, cultural, and social importance. Seattle's eight historic districts and more than 400 structures, sites, and objects of historic, cultural, architectural, and social importance are valuable cultural assets. Through the process of designating and protecting new and existing districts and landmarks, we work with community members to promote the aesthetic, cultural, and economic strength of Seattle. Historic preservation in Seattle begins with community. Our historic resources provide tangible connections to the people and events that have shaped our communities and our collective histories. [...] Certificate of Approval — A written authorization, much like a permit, that must be issued before any changes can be made to the designated feature of a City [landmark]. City Landmarks — Learn about Seattle's 400+ landmarks. Historic Districts — Learn about Seattle's eight designated historic districts.