The bill aims to reduce embodied carbon emissions in buildings and building materials by establishing new regulations within the Washington state building code. It mandates the state building code council to adopt rules for embodied carbon emissions reductions, applicable to new constructions, additions, and renovations of buildings over 100,000 square feet, excluding school district projects. The bill outlines three compliance pathways for projects: maintaining a portion of an existing structure, demonstrating reduced life-cycle stage emissions of covered products, or conducting a whole building life-cycle assessment. Additionally, it requires the council to consult with various state agencies and stakeholders in developing these standards.

Furthermore, the bill introduces a public database for tracking embodied carbon emissions reductions data, which must be maintained by the department of commerce. It also establishes educational resources to support implementation, including guidelines for reporting and conducting life-cycle assessments. The bill sets a target for a 30% reduction in embodied carbon emissions by 2030, with incremental requirements leading up to that goal. The state building code council is tasked with reporting progress on these initiatives and ensuring compliance with the new standards.