Establishes a performance-based compliance pathway for low-rise residential buildings in Washington.

The bill directs the state building code council to create a performance-based compliance pathway for low-rise residential buildings, allowing coordinated compliance with the international building code, Washington state energy codes, and greenhouse gas emissions rules. It mandates the adoption of a mandatory appendix to the international building code for buildings with one to six stories, effective after January 1, 2027.

Establishes a performance-based compliance pathway for low-rise residential buildings in Washington.

The bill directs the state building code council to create a performance-based compliance pathway for low-rise residential buildings, allowing coordinated compliance with the international building code, Washington state energy codes, and greenhouse gas emissions rules. It mandates the adoption of a mandatory appendix to the international building code for buildings with one to six stories, effective after January 1, 2027.