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Building Codes and Design Information

Building Codes adopted by the City of Mill Creek as of 7/1/2013, as amended by the State of Washington Building Code Council (SBCC):

2015 International Building Code

  • The International Code Council promulgates the International Codes that form the basis for building codes in Washington State and the City of Mill Creek.  Visit their site to explore the national code development process.

  • In Washington the  State Building Code Council is charged with the adoption and amendment of the International Codes.  The council was created by the State Legislature in 1974 and given authority from RCW 19.27. 

  • The State Energy Codes can be found at: Residential Energy Code Info  

2015 International Residential Code  
2015 International Mechanical Code  
2015 International Fuel Gas Code  
2015 International Fire Code  
2015 Existing Building Code  
2015 International Property Maintenance Code  
2015 Uniform Plumbing Code (link not available)
2015 Washington State Energy Code


Ground Snow Load   25 psf
Seismic Design   Category D1
Wind Speed   110mph
Wind Exposure   B & C