2SHB 1458
In CommitteeHouse
Embodied carbon/buildings
Reducing embodied carbon emissions of buildings and building materials.
This status may be delayed. See Action History below for the latest updates.
How does a bill become law?
- Introduced: The bill is filed and assigned a number.
- Committee: A subject-matter committee holds hearings, takes public testimony, and decides whether to advance the bill.
- Floor Vote: The full chamber (House or Senate) debates and votes on the bill.
- Opposite Chamber: The bill repeats the committee and floor vote process in the other chamber.
- Governor: The Governor reviews the bill and decides whether to sign or veto it.
- Signed: The bill has been signed into law.
AI Analysis
This bill requires new and major renovation commercial buildings in Washington to reduce embodied carbon emissions—the greenhouse gases released during material production and construction—by at least 30% by 2030. It establishes reporting, verification, and public transparency requirements, and creates tools to help builders and designers comply.
- Requires the State Building Code Council to adopt rules limiting embodied carbon emissions for new construction and major renovations (50,000 sq ft or larger) of commercial buildings, aiming for a 30% reduction compared to industry baseline by 2030.
- Allows projects to meet the emissions target either by using project-specific material data (including product- and facility-specific environmental product declarations) or by conducting a whole-building life-cycle assessment against a reference building.
- Requires that at least 45% of an existing building’s structure and envelope be reused to qualify for reduced embodied carbon requirements in renovation projects.
- Mandates that the Department of Commerce create a public database for reporting project-level embodied carbon data and a public website with guidance, checklists, and training tools.
- Requires random audits of 3% of projects annually and sets deadlines for rule adoption (by July 1, 2026) and progress reporting (starting December 31, 2028).
Who is affected
- Commercial building owners and developers — New and renovating commercial building owners and developers must meet new embodied carbon limits for projects 50,000 sq ft or larger, and must report material emissions using standardized tools and declarations.
- Design professionals (architects and engineers) — Architects and engineers must calculate and certify embodied carbon emissions using project-specific data and sign off on compliance, increasing their responsibility and potential liability.
- Construction material manufacturers and suppliers — Material suppliers must provide product- and facility-specific environmental product declarations (EPDs) to help meet reporting requirements, potentially changing how they disclose product impacts.
- Local government building officials — Local governments must use the state database and may be subject to audits, while also needing to train staff on new reporting and compliance procedures.
- General public and building users — The public gains access to project-level emissions data and educational resources, increasing transparency and awareness about building climate impacts.
Pro/Con Analysis
Stronger case for benefits
Potential Benefits (5)
The public gains access to transparent, standardized embodied carbon data and educational resources, increasing awareness of building climate impacts and enabling informed consumer and civic engagement—this transparency supports long-term demand shifts toward low-carbon development and strengthens accountability for climate commitments.
EnvironmentPeopleRef: Sec. 5(2); Sec. 8(2)The bill accelerates innovation in low-carbon building materials and construction practices—by mandating project-specific data and whole-building assessments, it creates market pull for cleaner products (e.g., low-carbon concrete, mass timber), potentially lowering long-term costs through economies of scale and fostering new regional supply chains and green jobs.
Business & EmploymentPeopleRef: Sec. 8(1); Sec. 3(1)(a); Sec. 4(1)Requiring reuse of 45% of existing structure and envelope in renovations reduces demolition waste, preserves embodied energy in existing buildings, and supports adaptive reuse—this lowers overall construction waste and associated environmental harms while extending building lifespans.
EnvironmentPeopleRef: Sec. 2; Sec. 8(1)The state-mandated public website with checklists, training, and templates lowers the barrier to compliance for smaller firms and less-resourced jurisdictions—supporting workforce upskilling and knowledge transfer across the AECO sector.
EducationLean peopleRef: Sec. 5(2); Sec. 7(2)Reducing embodied carbon aligns with Washington’s climate goals and mitigates long-term public health risks from climate change—such as extreme heat, wildfire smoke, and vector-borne disease—by cutting greenhouse gas emissions from one of the state’s fastest-growing sectors (construction), thereby protecting vulnerable populations most exposed to climate harms.
Public SafetyPeopleRef: Sec. 8(1); Sec. 7(1)
Potential Concerns (5)
Commercial building owners and developers face increased compliance costs for new construction and major renovations—requiring project-specific material data, life-cycle assessments, and third-party verification—potentially raising project costs by 3–7% for large projects, especially for complex or high-end builds where low-carbon materials are scarce or expensive.
Business & EmploymentLean industryRef: Sec. 3(1)(a); Sec. 4(1); Sec. 8(1)Design professionals (architects, engineers) and material suppliers face increased liability exposure and documentation burden—design professionals must sign off on emissions calculations with attestation under professional standards, and suppliers must provide facility-specific EPDs, increasing operational complexity and potential legal risk.
Business & EmploymentIndustryRef: Sec. 5(2); Sec. 7(2)(c), (d), (l)Local governments must train staff and integrate new reporting and verification requirements into permitting workflows, adding administrative burden without dedicated state funding—though the state provides tools, implementation costs fall to municipalities, disproportionately affecting smaller jurisdictions with limited resources.
Local GovernmentLean industryRef: Sec. 5(2); Sec. 8(2)Material suppliers—especially small- and mid-sized manufacturers—must invest in environmental product declarations (EPDs) and facility-level data collection to remain competitive, which may favor large, vertically integrated producers with existing sustainability infrastructure and economies of scale.
Business & EmploymentLean industryRef: Sec. 8(1); Sec. 3(1)(a)The 3% annual audit requirement and public database may create reputational risk for non-compliant or underperforming projects, potentially chilling investment in mid-market or lower-margin developments where margins are thin and financing is more sensitive to cost overruns.
Business & EmploymentRef: Sec. 8(2); Sec. 5(1)
Who Is Most Affected
Large commercial developers and institutional owners (e.g., universities, hospitals) are best positioned to absorb upfront compliance costs and leverage scale to source low-carbon materials; many already have sustainability teams and ESG reporting infrastructure, turning regulation into competitive advantage.
Small- and mid-sized contractors, architects, and material suppliers face higher relative compliance costs and may lack access to EPD data or modeling tools—though early adopters could gain market share in emerging green construction niches.
Low- and middle-income renters and building users benefit indirectly from reduced climate risk and improved air quality, but face no direct cost savings—though if construction costs rise significantly, new housing supply may tighten, potentially increasing rents over time.
Local governments gain climate policy alignment and public health co-benefits but bear unfunded implementation costs—smaller jurisdictions may struggle with staffing and technical capacity despite state-provided tools.
Existing building owners face minimal impact unless undertaking major renovations ≥50,000 sq ft—but those doing so may benefit from reuse incentives and long-term operational savings if energy codes also improve.