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Plumbing and gas piping code books and information
Access guidelines to make sure that your project design is code compliant and will pass inspection.
King County codes
King County Department of Local Services, Permitting Division
King County building and mechanical permits
King County Parcel Viewer
Find tax parcel numbers and addresses
Seattle codes
Seattle Department of Construction & Inspections (SDCI)
Seattle building and mechanical permits. Code books can be purchased from the SDCI.
Seattle Energy Code
The Seattle Energy Code regulates the energy-use features of new and remodeled buildings.
Seattle Fuel Code
The Seattle Fuel Gas Code regulates design and installation of fuel gas distribution piping systems, appliances, appliance venting systems, combustion air provisions, gaseous hydrogen systems, and motor vehicle gas fuel stations.
Seattle Public Utilities
Sewer and water utilities
Seattle Side Sewer Cards
Property sewer locations and connections
Other Seattle Codes
Important Seattle codes such as: mechanical, building, land use, and more.
Additional resources
Washington Association of Building Officials
Code books and code information
International Code Council
Code books and code information
Washington State Dept. of Labor and Industries
Contractor registration and plumbing installer certification
Washington Building Codes
Washington state building codes including all years of issue.