Other agency services
Permitting services are available online via this website and MyBuildingPermit.com. For details and information about our new location and office hours, see our Customer Service Bulletin.
Special use
The King County, Department of Executive Services, Real Estate Services (RES) provides special use permits for work or events on King County owned property, such as a park or drainage facility. This permit is also required for temporary uses of King County right-of-way. RES also manages utility franchise agreements.
Plumbing permits
Seattle - King County Public Health provides plumbing permits for unincorporated King County, Cities of Seattle, Beaux Arts and Clyde Hill.
Electrical permits
The Washington State Department of Labor and Industries (L&I) provides electrical permits for unincorporated King County.
Septic systems
Seattle - King County Public Health provides septic system, or "on-site sewage system" (OSS) permits for all of King County.
Business licenses
King County requires business licenses for regulated activities.
Hydraulics
Hydraulics project approval permit for property within unincorporated King County.
Historic Preservation
Historic preservation and landmark information from the King County Department of Permitting and Environmental Review.
Road Vacation
Road vacation permit information for property within unincorporated King County.