Building Codes and Guidance

Apply for a City of Mill Creek Building Permit at

24-Hour Inspection Request Line

Adopted Codes
Building Codes adopted by the City of Mill Creek as of 4/28/2024, as amended by the State of Washington Building Code Council (SBCC):

2021 International Building Code
2021 International Residential Code
2021 International Mechanical Code
2021 International Fuel Gas Code
2021 International Fire Code
2021 International Existing Building Code
2021 Uniform Plumbing Code
Residential Energy Code Info
WA State Amendments to ICC Codes as applicable
National Electrical Code: Electrical permits administered by the WA State Dept. of L & I

Design Criteria for Mill Creek

Ground Snow Load 25 psf
Seismic Design Category D1
Wind Speed 110mph
Wind Exposure B & C
Minimum Frost Depth 12 inches

Quick Links

Architect / Engineer License Status
Call Before You Dig
Construction Tip Sheets
Do I Need a Permit?
Energy Code Questions
International Code Council
Licensed Contractors
Fence Permit Site Plan Example
Washington Association of Building Officials