State of Washington Building Code Council 

Adopted I-Codes:
​2018 International Building Code (IBC)
2018 International Residential Code (IRC)
2018 International Energy Conservation Code (IECC)
Applicability (statewide, local, limited): STATEWIDE

The State of Washington Building Code Council adopts the codes statewide.   

Tall Mass Timber Adoption

The tall mass timber provisions went into effect in 2019.

Expected date most recent code will be adopted:

February 2021


The adopted code amendments are found in the following link Building Code Amendments | SBCC (wa.gov). The International Existing Building Code is adopted by reference in the Washington State Building Code. The State of Washington adopted ICC codes may be viewed in read only format over the ICC website.

Page last updated: December 2023