Washington
State of Washington Building Code Council
Adopted I-Codes:
2021 Washington State Building Code
2021 Washington State Residential Code
2021 Washington State Energy Code
Applicability (statewide, local, limited): STATEWIDE
The State of Washington Building Code Council adopts the codes statewide.
Mass Timber Adoption
The mass timber provisions went into effect in 2019.
Notes:
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: March 2026