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H 3337

An Act relating to embodied carbon emission reductions in state-funded projects

194th Legislature (2025-2026) Introduced by Sean Garballey

Massachusetts requires state-funded construction projects to measure and reduce embodied carbon emissions from materials and manufacturing, establishing climate standards for public infrastructure.

Bill reported favorably by committee and referred to the committee on House Ways and Means
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Bill Summary · H 3337

Legislative bill overview

H 3337 requires Massachusetts state-funded construction and infrastructure projects to measure, report, and reduce embodied carbon emissions—the greenhouse gases generated during material extraction, manufacturing, and transportation. The bill establishes standards and benchmarks for lifecycle carbon assessments on public works projects, making Massachusetts one of the first states to formally regulate embodied carbon in government procurement.

Why is this important

Embodied carbon accounts for 11% of global emissions and is increasingly recognized as a major but overlooked source of climate impact. By targeting state-funded projects, Massachusetts would create market incentives for low-carbon building materials and construction practices, potentially influencing private sector behavior and material suppliers. This addresses emissions that occur before a building even begins operation—a growing concern as operational emissions decline through energy efficiency.

Potential points of contention

  • Cost implications: Requiring embodied carbon assessment and potentially specifying lower-carbon materials could increase project costs, affecting public budgets and competitiveness of contractors unfamiliar with these standards
  • Implementation complexity: Measuring embodied carbon requires standardized databases and methodologies that may not yet be fully developed or accessible, creating enforcement and compliance challenges
  • Supply chain readiness: Domestic material suppliers and contractors may lack capacity to meet lower-carbon requirements, potentially extending timelines or requiring imports, which could contradict local economic development goals

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

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