Page updated as of April 2020

State Code Agency:

Washington State Building Code Council
Phone: 360-407-9277

Current State Codes and Edition Adopted:

  • 2015 International Building Code (IBC)
  • 2015 International Existing Building Code (IEBC)
  • 2015 International Mechanical Code (IMC)
  • 2015 Uniform Plumbing Code (UPC)
  • 2015 International Fire Code (IFC)
  • 2015 International Energy Conservation Code (IECC)
  • 2015 International Residential Code (IRC)

Applicability (statewide, local, limited): STATEWIDE

Building codes are adopted in Washington by statute. The Washington State Building Code Council has authority to adopt amendments to these codes for statewide application.

Amendments Disadvantaging Wood Construction:

There are no apparent amendments negatively impacting wood construction.

Next Update Cycle (amendment opportunities):


Expected date most recent code will be adopted.


Additional Notes:

Tall Mass Timber

The IBC tall mass timber provisions found in the 2021 edition of the IBBC became effective July 1, 2019.