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Bill

HB 1342

Modeling, measurement, and reporting embodied carbon emission reductions from structural building products in state-funded projects.

2023-2024 Regular Session Introduced by Mike Chapman and 4 co-sponsors

Washington state must standardize measurement and reporting of embodied carbon emissions from structural materials in state-funded construction projects to reduce building sector climate impact.

By resolution, reintroduced and retained in present status.
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Bill Summary · HB 1342

Legislative bill overview

HB 1342 requires Washington state to develop standardized methods for measuring, modeling, and reporting embodied carbon emissions from structural building materials used in state-funded construction projects. The bill establishes a framework for tracking the carbon footprint of materials like steel, concrete, and wood before they're installed, rather than only measuring operational emissions after construction.

Why is this important

Embodied carbon in building materials represents a significant portion of construction's total environmental impact—often 20-30% of a building's lifetime emissions. By creating consistent measurement standards for state projects, Washington could drive demand for lower-carbon materials, incentivize manufacturers to reduce production emissions, and establish a replicable model other states might adopt. This also provides state decision-makers with data to make procurement choices that align with climate goals.

Potential points of contention

  • Cost implications: Requiring embodied carbon analysis and potentially prioritizing lower-carbon materials may increase upfront construction costs, raising questions about budget impacts on other state projects
  • Supply chain feasibility: Washington's construction industry may lack sufficient suppliers of certified low-carbon materials, creating implementation delays or forcing reliance on out-of-state products
  • Measurement standards complexity: Developing accurate, consistent embodied carbon reporting requires technical expertise and may face disagreement over which calculation methods are most valid or appropriate

Compiled from official sources — confirm details with the bill’s official record.

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