The bill aims to implement the International Wildland Urban Interface Code in Washington State by amending existing laws related to building codes. It reenacts and amends RCW 19.27.031, which outlines the state building code that includes various model codes, now explicitly incorporating the International Wildland Urban Interface Code as a required standard. The bill mandates that the state building code council adopt this code by November 1, 2029, following the completion of statewide wildfire hazard and base-level wildfire risk maps for each county. Additionally, it allows counties, cities, and towns to adopt the code in whole or in part until 90 days after the completion of the statewide maps.

Furthermore, the bill establishes a framework for the development of these wildfire hazard maps and provides for technical assistance and grant programs to support local jurisdictions in this effort. It emphasizes collaboration among state agencies, local governments, and fire defense boards to ensure that building codes reflect current wildfire science and regional needs. The bill also includes provisions for local amendments to the code, contingent upon approval from the local fire marshal and the building code council, ensuring that local conditions are adequately addressed.

Statutes affected:
Original Bill: 19.27.560
Substitute Bill: 19.27.560, 43.30.580