State of Washington Building Code Council 

Current Codes and Edition Adopted:
​2018 Washington State Building Code
2018 Washington State Residential Code
2018 International Existing Building Code (IEBC)
2018 Washington State Energy Code ​
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.

Amendments Disadvantaging Wood Construction:

Amendments do not impact Wood Construction.

Expected date most recent code will be adopted:

February 2021

Next Update Cycle:

The State’s code were effective February 2021 and the update should begin in 2022.


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: February 2022