Washington permit requirements
Each county and city in Washington runs its own permit office with its own thresholds, fees, and portals. Use the links below to find the office and requirements for your project.
Building code in Washington
Washington State Residential Code (part of the Washington State Building Code). Based on the International Residential Code (IRC), with Washington amendments.
Administered by Washington State Building Code Council (SBCC). Official source
Local jurisdictions enforce the state code and may adopt limited amendments.
Most local permit thresholds derive from this code. See our sources and standards.