Building Construction Codes

Beginning July 1, 2016, the State Building Code includes:

• 2015 International Building Code – as amended and adopted by Washington State (Includes adoption of Appendix E and ICC/ANSI A117.1-2009, and the 2015 International Existing Building Code and International Swimming Pool and Spa Code)
• 2015 International Residential Code – as amended and adopted by Washington State (Includes adoption of Appendices F and Q) Chapter 11 and Chapters 25 through 43 are not adopted)
• 2015 International Mechanical Code – as amended and adopted by Washington State (Includes adoption of 2015 International Fuel Gas Code, 2014 NFPA 58 & 2014 NFPA 54)
• 2015 International Fire Code – as amended and adopted by Washington State
• 2015 Uniform Plumbing Code – as amended and adopted by Washington State  (Includes adoption of Appendices A, B and I) NOTE: See also WSEC Section C404 for additional piping requirements
• 2015 Washington State Energy Code:
  • WAC 51-11C (Commercial)
  • WAC 51-11R (Residential) (2nd printing)
  • Appendix Chapters

The Washington State Building Code is comprised of several different codes . Most are national model codes (International Codes) adopted by reference and amended at the state level. Others, such as the Washington State Energy Code, are state-written state-specific codes.

• View the International model codes
• View the Washington State amendments to the International Codes
• View the Uniform Plumbing Code