Deep dive: Embodied carbon measurement & reduction — the fastest-moving subsegments to watch

Embodied carbon accounts for roughly 11% of global greenhouse gas emissions, yet until recently it received a fraction of the attention devoted to operational energy. That asymmetry is shifting rapidly. Regulatory mandates in California, Colorado, the European Union, and British Columbia now require whole-life carbon assessments for public buildings. Procurement standards from the General Services Administration (GSA) and major private developers are embedding Environmental Product Declarations (EPDs) into bid requirements. And a new generation of digital tools is making it possible to measure, benchmark, and reduce upfront carbon with a precision that was simply unavailable five years ago. For founders building in the built environment space, the embodied carbon subsegments moving fastest today represent both urgent market opportunities and durable competitive moats.

Why It Matters

The built environment generates approximately 37% of global energy-related CO2 emissions. While operational carbon has declined steadily through electrification, heat pumps, and building automation, embodied carbon has remained stubbornly flat or even increased as construction volumes grow. According to the World Green Building Council, embodied carbon will account for nearly half of total new construction emissions through 2050 if current material choices and construction methods persist.

In North America, the regulatory landscape has accelerated dramatically. California's Buy Clean Act, updated in 2025, now covers structural steel, concrete, flat glass, and mineral wool insulation procured for state-funded projects. Colorado's Embodied Carbon in Construction (ECIC) bill mandates EPDs for all publicly funded buildings exceeding 50,000 square feet. The GSA's low-embodied-carbon materials requirements, backed by $2.15 billion in Inflation Reduction Act funding, apply to all federal construction and major renovation projects. The EU's revised Energy Performance of Buildings Directive (EPBD) requires whole-life carbon reporting for all new buildings from 2030, with limit values expected by 2033.

The financial implications are substantial. Buildings designed with embodied carbon optimization from the outset typically achieve 20-40% reductions in upfront carbon at cost premiums of 0-3%, according to research from the Carbon Leadership Forum. Conversely, ignoring embodied carbon increasingly creates regulatory compliance risk, reputational exposure, and stranded asset potential as carbon pricing mechanisms expand. For institutional investors managing real estate portfolios, embodied carbon performance is becoming a material factor in asset valuation, insurance underwriting, and green bond eligibility.

Key Concepts

Environmental Product Declarations (EPDs) are standardized, third-party-verified documents that quantify the environmental impact of building products across their lifecycle. EPDs follow ISO 14025 and EN 15804 standards and report Global Warming Potential (GWP) in kilograms of CO2 equivalent per functional unit. The number of construction EPDs registered in North America grew from approximately 4,500 in 2020 to over 38,000 by the end of 2025, driven by Buy Clean mandates and procurement requirements from major developers including Hines, Lendlease, and Boston Properties.

Whole-Life Carbon Assessment (WLCA) evaluates the total greenhouse gas emissions associated with a building across its entire lifecycle, from raw material extraction (modules A1-A3) through construction (A4-A5), operation (B1-B7), and end-of-life (C1-C4), including potential benefits from reuse and recycling (module D). WLCA provides a comprehensive framework for identifying carbon hotspots and comparing design alternatives. Tools such as One Click LCA, Tally, and EC3 have reduced the time required for a WLCA from weeks to hours, enabling integration into early-stage design workflows.

Carbon Sequestration in Bio-based Materials refers to the atmospheric CO2 absorbed by timber, bamboo, hemp, and other plant-based construction materials during their growth phase. Mass timber products such as cross-laminated timber (CLT) and glue-laminated timber (glulam) can store 0.7-1.0 tonnes of CO2 per cubic meter. When combined with sustainable forestry practices and long building lifespans, bio-based materials can achieve net-negative embodied carbon for structural systems, effectively turning buildings into carbon sinks.

Supplementary Cementitious Materials (SCMs) partially replace Portland cement clinker in concrete mixes, reducing the carbon intensity of concrete. Common SCMs include fly ash, ground granulated blast-furnace slag (GGBS), calcined clay, and natural pozzolans. Portland-limestone cement (PLC, or Type IL) reduces clinker content by 5-15% with minimal performance impact. Advanced low-carbon concrete mixes incorporating high volumes of SCMs, along with novel binders such as LC3 (limestone calcined clay cement), can reduce concrete embodied carbon by 30-60% compared to conventional mixes.

Embodied Carbon Measurement KPIs: Benchmark Ranges

Metric	Below Average	Average	Above Average	Top Quartile
Structural System GWP (kgCO2e/m2)	>500	350-500	200-350	<200
Concrete GWP (kgCO2e/m3)	>350	250-350	150-250	<150
Steel GWP (kgCO2e/tonne)	>2,000	1,500-2,000	900-1,500	<900
Whole-Building GWP (kgCO2e/m2)	>800	550-800	350-550	<350
EPD Coverage (% of materials by cost)	<20%	20-50%	50-80%	>80%
Carbon Reduction vs. Baseline	<10%	10-20%	20-35%	>35%

Fastest-Moving Subsegments

Digital Measurement and Benchmarking Platforms

The most immediate commercial momentum is concentrated in software platforms that automate embodied carbon calculation and benchmarking. The Building Transparency EC3 (Embodied Carbon in Construction Calculator) tool, launched as an open-access platform, now contains over 130,000 EPDs and has been used on more than 25,000 projects across North America. One Click LCA, a Finnish company with a growing North American presence, raised $15 million in Series B funding in 2024 and expanded its integration with Autodesk Revit, Rhino, and IFC models to enable real-time carbon assessment during design. Tally, developed by KieranTimberlake and integrated directly into Revit, provides architects with instantaneous feedback on material choices.

The market dynamics favor consolidation and platform effects. Developers and general contractors increasingly require standardized carbon data pipelines that integrate with building information modeling (BIM) workflows, procurement systems, and sustainability reporting platforms. Companies that control the data layer and establish benchmarking databases gain network effects that create durable competitive advantages. Early-stage founders should note that the highest-value opportunities are not in standalone calculators but in platforms that connect carbon data to procurement decisions, regulatory compliance, and financial reporting.

Low-Carbon Concrete and Cement Innovation

Concrete is the single largest contributor to embodied carbon in most buildings, accounting for 40-60% of structural system emissions. The subsegment focused on reducing concrete carbon intensity is attracting significant venture capital and industry investment. CarbonCure Technologies, which injects captured CO2 into fresh concrete, has deployed its technology at over 700 concrete plants across North America and raised $130 million in total funding through 2025. Sublime Systems, developing an electrochemical process to produce cement clinker at ambient temperature, raised $87 million in Series B funding in 2024 and began pilot production at its Holyoke, Massachusetts facility.

Brimstone Energy is pursuing a different approach, producing Portland cement from calcium silicate rock rather than limestone, eliminating the process emissions that account for 60% of conventional cement carbon. The company raised $189 million in combined Series A and B rounds and began operating its demonstration plant in 2025. Holcim, the world's largest cement producer, committed $2 billion to low-carbon product development and acquired several technology startups to accelerate its decarbonization roadmap.

The regulatory tailwind is unmistakable. The GSA's low-embodied-carbon procurement standards establish maximum acceptable GWP thresholds for concrete used in federal projects, creating immediate demand for products that meet or exceed these benchmarks. California's Buy Clean Act now requires concrete EPDs for state-funded projects and will implement GWP limits by 2027.

Mass Timber and Bio-based Structural Systems

Mass timber construction has moved from a niche Scandinavian practice to a mainstream North American building system. The International Building Code (IBC) 2021 update permits mass timber buildings up to 18 stories, and several jurisdictions have adopted these provisions. The US mass timber market grew at a compound annual rate of 25% between 2020 and 2025, with over 1,700 mass timber projects completed or under construction across North America by the end of 2025.

Landmark projects are demonstrating commercial viability at scale. Ascent MKE in Milwaukee, a 25-story mass timber hybrid tower, opened in 2022 as the tallest timber building in North America at that time. The Google Bay View campus in Mountain View, California incorporates mass timber roof structures spanning 19,500 square meters. Walmart's new corporate campus in Bentonville, Arkansas features 350,000 square feet of mass timber construction, representing the retailer's commitment to low-carbon building practices.

The embodied carbon advantage is substantial. Mass timber structural systems typically achieve 60-75% lower embodied carbon than equivalent steel or concrete systems when accounting for biogenic carbon sequestration. Even excluding sequestration credits, mass timber achieves 25-40% lower embodied carbon due to lower manufacturing energy requirements. For founders, the highest-growth opportunities in mass timber lie in connection hardware, fire protection systems, acoustic solutions, and digital fabrication technologies that address remaining performance and constructability challenges.

Circular Construction and Material Reuse

The circular construction subsegment is gaining momentum as demolition waste volumes grow and virgin material costs increase. In the United States, construction and demolition debris totals approximately 600 million tons annually, more than twice the volume of municipal solid waste. Less than 30% is currently recovered for beneficial use, representing both an environmental challenge and a commercial opportunity.

Rotor Deconstruction, based in Brussels with growing North American partnerships, has pioneered systematic building material reuse through digital inventory systems and reverse logistics networks. Rheaply, a Chicago-based marketplace for surplus building materials, raised $20 million in Series B funding and expanded to serve over 300 institutional clients including universities, hospitals, and corporate campuses. The platform has diverted more than 7.5 million pounds of materials from landfills.

Material passports and digital product documentation are enabling circular material flows at scale. Madaster, a Dutch platform that creates digital material passports for buildings, expanded to North America in 2024 and now documents material compositions for over 10,000 buildings globally. These passports track material quantities, locations, environmental impacts, and residual values, transforming buildings from waste liabilities into material banks with documented future value.

What's Working

The convergence of regulatory mandates, digital tools, and material innovation is producing measurable results in projects that integrate embodied carbon considerations from the earliest design stages. The Kendeda Building for Innovative Sustainable Design at Georgia Tech, completed to Living Building Challenge standards, achieved a 46% reduction in embodied carbon through optimized structural design, high-recycled-content steel, and regionally sourced mass timber. The project demonstrated that significant carbon reductions are achievable within conventional construction budgets when addressed during schematic design rather than as a late-stage value-engineering exercise.

Standardized procurement requirements are also driving market transformation. Microsoft's campus development in Redmond, Washington, set maximum embodied carbon targets for all structural materials and required product-specific EPDs from every concrete and steel supplier. This approach not only reduced project-level embodied carbon by 30% but also incentivized local suppliers to invest in lower-carbon production processes and obtain EPDs for their products.

What's Not Working

Despite significant progress, several persistent barriers slow adoption. The fragmented nature of the construction industry, with approximately 750,000 construction firms operating in the United States, makes standardization difficult. Small and mid-sized contractors, which perform the majority of construction work, often lack the technical capacity to evaluate EPDs or specify low-carbon alternatives. Training and education programs remain insufficient to close this knowledge gap at scale.

Data availability and quality continue to challenge accurate measurement. Industry-average EPDs, rather than product-specific declarations, still represent the majority of available data for many product categories. Using industry-average data can overstate or understate actual embodied carbon by 30-50%, undermining the accuracy of whole-life carbon assessments and limiting the effectiveness of procurement-based carbon reduction strategies.

Action Checklist

• Establish whole-life carbon targets during project programming, before schematic design begins
• Require product-specific EPDs for all major structural materials in procurement specifications
• Integrate embodied carbon assessment tools into BIM workflows for real-time design feedback
• Benchmark projects against the Carbon Leadership Forum's CLF Baseline database
• Evaluate mass timber and hybrid structural systems for projects up to 18 stories
• Specify low-carbon concrete mixes with maximum GWP thresholds aligned with Buy Clean standards
• Document material compositions through digital material passports for future circularity
• Include embodied carbon performance in sustainability reporting and green bond frameworks

FAQ

Q: What is the cost premium for reducing embodied carbon in new construction? A: Research from the Carbon Leadership Forum and multiple project case studies consistently shows that 20-30% embodied carbon reductions are achievable at 0-2% cost premiums when addressed during early design stages. Reductions exceeding 40% may carry premiums of 3-8%, depending on material availability and regional supply chains. The key is integration into the design process from the outset rather than late-stage substitution.

Q: How do I prioritize which materials to focus on for the greatest carbon reduction? A: Concrete and steel typically account for 60-80% of structural embodied carbon. Prioritize these materials first: specify low-carbon concrete mixes with SCMs and set maximum GWP thresholds for structural steel. For non-structural systems, insulation, cladding, and interior finishes offer significant reduction opportunities. Use an LCA tool early in design to identify the specific carbon hotspots for your project type and geometry.

Q: Are EPDs required by law in North America? A: Yes, for an expanding set of project types. California's Buy Clean Act requires EPDs for steel, concrete, glass, and insulation on state-funded projects. The GSA requires EPDs for federally funded construction. Colorado, Oregon, and New York have enacted or proposed similar requirements. While private sector projects are not yet universally mandated, major developers and institutional investors increasingly require EPDs as a condition of procurement.

Q: How does mass timber compare to steel and concrete on fire safety? A: Mass timber elements achieve fire ratings of up to 2 hours through charring behavior, where the outer layer carbonizes and insulates the structural core. The IBC 2021 permits mass timber buildings up to 18 stories with appropriate fire protection measures, including sprinklers and encapsulation. Fire performance has been validated through extensive testing by the USDA Forest Products Laboratory and multiple large-scale fire tests conducted by ATF and industry organizations.

Q: What role does carbon sequestration play in embodied carbon accounting? A: Biogenic carbon stored in wood products is reported in module A1 of EPDs and can offset emissions from other lifecycle stages. However, accounting methodologies vary. EN 15804+A2 requires separate reporting of biogenic carbon, and some frameworks (including the LETI Climate Emergency Design Guide) exclude sequestration credits from embodied carbon targets to maintain conservatism. Founders should understand which accounting methodology their target market uses before claiming sequestration benefits.

Sources

• Carbon Leadership Forum. (2025). CLF Material Baselines: 2025 Update for North American Structural Materials. Seattle, WA: University of Washington.
• World Green Building Council. (2024). Bringing Embodied Carbon Upfront: Coordinated Action for the Building and Construction Sector. London: WorldGBC.
• International Energy Agency. (2025). Global Status Report for Buildings and Construction 2025. Paris: IEA Publications.
• US General Services Administration. (2025). Low Embodied Carbon Materials Guidance for Federal Buildings. Washington, DC: GSA.
• Architecture 2030. (2025). Carbon Smart Materials Palette: Material Carbon Emission Factors and Strategies. Santa Fe, NM: Architecture 2030.
• USDA Forest Products Laboratory. (2024). Mass Timber in North America: State of the Industry Report. Madison, WI: FPL.
• European Commission. (2024). Revision of the Energy Performance of Buildings Directive: Whole-Life Carbon Requirements. Brussels: European Commission.