Market map: Low-carbon buildings & retrofits — the categories that will matter next

The global building stock accounts for approximately 37% of energy-related carbon emissions, according to the United Nations Environment Programme's 2025 Global Status Report for Buildings and Construction. Yet fewer than 3% of existing commercial buildings in the United States have undergone deep energy retrofits. As building performance standards (BPS) expand across major US cities, federal incentives from the Inflation Reduction Act (IRA) shift capital toward decarbonization, and commercial real estate tenants increasingly demand verified sustainability credentials, the low-carbon buildings and retrofits market is entering a period of rapid category formation. This market map identifies the solution categories gaining traction, the key players shaping each segment, and the whitespace opportunities procurement teams should prioritize over the next two to three years.

Why It Matters

Buildings represent the largest single class of long-lived assets in the US economy, with an average commercial building lifespan exceeding 50 years. Decisions made today about envelope performance, mechanical systems, and materials lock in emissions trajectories for decades. For procurement professionals, the low-carbon buildings market matters for three interconnected reasons.

First, regulatory pressure is accelerating. As of early 2026, more than 40 US cities and states have enacted or proposed building performance standards, including New York City (Local Law 97), Boston (BERDO 2.0), Denver, and Washington, DC. These regulations impose carbon intensity limits on existing buildings, creating mandatory retrofit demand. Non-compliance penalties in New York City alone can exceed $268 per metric ton of CO2 equivalent above the threshold.

Second, tenant and investor expectations are shifting. The 2025 CBRE Occupier Survey found that 64% of corporate tenants in the US now include energy performance requirements in lease negotiations, up from 41% in 2022. On the capital side, GRESB participation among US real estate funds grew 28% year-over-year in 2025, making building-level performance data a factor in asset valuations.

Third, federal incentives have fundamentally changed the economics. The IRA's 179D tax deduction for energy-efficient commercial buildings was expanded to up to $5.00 per square foot for projects meeting prevailing wage and apprenticeship requirements. The 45L tax credit for residential construction, the Investment Tax Credit for commercial solar and storage, and direct pay provisions for tax-exempt entities have created a multi-layered incentive stack that makes deep retrofits financially viable for the first time in many building classes.

Key Concepts

Building performance standards (BPS) set maximum carbon intensity or energy use intensity (EUI) thresholds that existing buildings must meet by specified compliance dates. Unlike energy codes that apply only to new construction, BPS create mandatory retrofit demand for the existing building stock.

Deep energy retrofits go beyond single-measure upgrades (such as lighting replacements) to achieve 50% or greater energy reduction through integrated improvements to building envelope, HVAC systems, controls, and on-site generation. The US Department of Energy defines deep retrofits as achieving a minimum 50% site energy savings.

Embodied carbon refers to the greenhouse gas emissions associated with manufacturing, transporting, and installing building materials. As operational emissions decrease through electrification and efficiency, embodied carbon becomes a proportionally larger share of a building's total lifecycle emissions, sometimes exceeding 50% for new construction.

Building electrification is the process of replacing fossil fuel systems (gas boilers, furnaces) with electric alternatives (heat pumps, induction cooking, electric water heaters). Full electrification eliminates on-site combustion emissions and allows buildings to benefit from grid decarbonization over time.

Digital twins and building analytics use real-time sensor data and modeling to optimize building operations, identify retrofit opportunities, and verify post-retrofit performance. These platforms close the gap between design-stage energy models and actual operational performance.

What's Working

Heat pump adoption is accelerating in commercial retrofits. Heat pump technology has matured significantly, with commercial-scale air-source and ground-source systems now capable of operating efficiently in cold climates down to -15°F. Carrier's AquaEdge series and Mitsubishi Electric's City Multi systems are being specified in commercial retrofits across the Northeast and Midwest. The New York State Energy Research and Development Authority (NYSERDA) reported a 72% increase in commercial heat pump rebate applications in 2025 compared to 2024. Johnson Controls completed a full electrification retrofit of a 500,000-square-foot office campus in Chicago, replacing natural gas boilers with ground-source heat pumps and achieving a 62% reduction in site energy use intensity.

Envelope-first retrofit approaches are proving their economics. Companies like Sealed, BlocPower, and Elevate have demonstrated that building envelope improvements (insulation, air sealing, window upgrades) combined with electrification can reduce energy costs by 30 to 50% in multifamily and commercial buildings. The Empire State Building's phased retrofit, which included window remanufacturing and insulation upgrades, reduced energy consumption by 40% and achieved payback within three years through utility savings. Passive House-level retrofit standards (EnerPHit) are being adopted for affordable housing retrofits in New York City, with the NYC Housing Authority committing to EnerPHit specifications for 10 pilot buildings.

Embodied carbon measurement is entering procurement specifications. The carbon footprint of building materials is increasingly quantified through Environmental Product Declarations (EPDs). The Federal Buy Clean Initiative, which requires EPDs for steel, concrete, glass, and asphalt used in federally funded projects, has driven a 300% increase in EPD filings with the EC3 database since 2023. Skanska, Turner Construction, and Hensel Phelps have incorporated embodied carbon limits into their standard procurement processes, requiring suppliers to provide EPDs and meet maximum global warming potential thresholds.

Smart building analytics are delivering measurable savings at scale. Platforms like Brainbox AI, 75F, and Prescriptive Data's Nantum OS use machine learning to optimize HVAC, lighting, and plug load management in real time. Brainbox AI reported average energy savings of 20 to 25% across its 500-plus commercial building installations in North America. JLL deployed Nantum OS across 80 million square feet of managed office space, achieving a 15% portfolio-wide energy reduction and using the data to prioritize capital retrofit investments.

What's Not Working

Retrofit financing remains fragmented and complex. Despite IRA incentives, building owners face a maze of overlapping federal, state, and utility programs with different application processes, eligibility criteria, and timelines. The Commercial Property Assessed Clean Energy (C-PACE) market, while growing, is available in only 39 states, and lender consent requirements continue to block transactions. A 2025 Urban Land Institute survey found that 58% of commercial real estate owners cited financing complexity as the primary barrier to retrofit investment, ahead of technology uncertainty or tenant disruption.

Workforce capacity is constraining retrofit deployment. The US faces a shortage of approximately 500,000 skilled tradespeople in building electrification and deep retrofit work, according to the National Electrical Contractors Association. Heat pump installation, advanced insulation techniques, and building commissioning require specialized training that existing construction workforce pipelines have not scaled to meet. Project timelines for commercial retrofits have extended by an average of four to six months in 2025 due to labor constraints.

Performance verification gaps persist after retrofits. Many retrofits underperform their modeled savings because of inadequate commissioning, occupant behavior changes, or system integration issues. The Lawrence Berkeley National Laboratory found that 30% of commercial retrofits achieve less than 75% of projected energy savings in the first two years of operation. The gap between modeled and actual performance undermines investor confidence and makes performance-based financing structures difficult to scale.

Embodied carbon data quality is inconsistent. While EPD filings have increased, the quality and comparability of declarations vary widely. Different Product Category Rules (PCRs), system boundaries, and allocation methods produce EPDs that cannot be directly compared. The industry lacks a standardized methodology for whole-building lifecycle carbon assessment that procurement teams can reliably use for competitive bidding.

Split incentives between landlords and tenants remain unresolved. In leased commercial properties, building owners bear retrofit costs while tenants capture energy savings through lower utility bills. Green lease provisions and cost-recovery mechanisms exist in theory but are used in fewer than 20% of commercial leases, according to the Institute for Market Transformation.

Key Players

Established Leaders

• Johnson Controls: Global building technology and solutions provider. Operates OpenBlue digital platform for building performance optimization and offers full-service retrofit design and installation across commercial, healthcare, and education sectors.
• Trane Technologies: Manufacturer of Trane and American Standard HVAC systems. Its EcoWise portfolio of low-GWP refrigerant heat pumps is widely specified in commercial retrofits. Committed to reducing customer emissions by one gigaton of CO2 equivalent by 2030.
• Carrier Global: HVAC systems manufacturer with the AquaEdge and AquaForce heat pump lines for large commercial applications. Active in federal energy efficiency programs and K-12 school electrification.
• Siemens Smart Infrastructure: Provides building automation, energy management, and digital twin platforms for commercial and institutional buildings. Its Desigo CC platform integrates HVAC, lighting, and fire safety controls.
• JLL (Jones Lang LaSalle): Real estate services firm managing over 5 billion square feet globally. Uses data analytics platforms to benchmark building performance and prioritize retrofit investments across client portfolios.

Emerging Startups and Platforms

• BlocPower: Building electrification startup focused on affordable housing and underserved communities. Has completed electrification projects on over 5,000 buildings using a lease-to-own financing model.
• Brainbox AI: AI-powered HVAC optimization platform operating in over 500 commercial buildings. Uses autonomous control algorithms to reduce energy consumption by 20 to 25% without hardware modifications.
• 75F: Cloud-based building automation system designed for mid-market commercial buildings. Combines IoT sensors with predictive algorithms for zone-level HVAC and lighting optimization.
• Sealed: Home and building energy performance company offering outcome-based financing for envelope and electrification upgrades. Customers pay based on verified energy savings rather than upfront project costs.

Key Investors and Funders

• US Department of Energy: Administers the Building Technologies Office, the Better Buildings Initiative, and IRA-funded programs including the $1 billion Green and Resilient Retrofit Program for HUD-assisted multifamily housing.
• NYSERDA (New York State Energy Research and Development Authority): Provides technical assistance, incentives, and financing for building decarbonization. Administers the Clean Heat program and supports BPS compliance pathways.
• Breakthrough Energy Ventures: Investor in building decarbonization technologies including BlocPower, Dandelion Energy, and Sealed.
• Fifth Wall: Venture capital firm focused on real estate technology. Has invested in building performance and retrofit companies including 75F, Measurabl, and View.

Action Checklist

1. Map regulatory exposure across your portfolio. Identify which buildings fall under current or pending building performance standards and timeline compliance milestones. Prioritize high-EUI properties in jurisdictions with near-term enforcement dates.
2. Conduct investment-grade energy audits on priority buildings. ASHRAE Level 2 or Level 3 audits provide the data needed to size retrofit scope, estimate costs, and model payback periods. Bundle audit contracts for portfolio-wide procurement savings.
3. Require EPDs in material procurement specifications. Align with Federal Buy Clean requirements by specifying maximum global warming potential thresholds for concrete, steel, insulation, and glazing. Use the EC3 (Embodied Carbon in Construction Calculator) tool for benchmarking.
4. Evaluate integrated electrification and envelope packages. Avoid single-measure replacements. Request proposals that combine heat pump installations with envelope improvements and controls upgrades to maximize energy savings and access the full IRA 179D deduction.
5. Establish performance verification protocols. Require post-retrofit measurement and verification (M&V) using IPMVP or ASHRAE Guideline 14 protocols. Include performance guarantees in contractor agreements with liquidated damages for underperformance.
6. Explore C-PACE and on-bill financing options. For properties in eligible jurisdictions, C-PACE financing attaches retrofit costs to the property tax assessment, spreading costs over 20 to 30 years and surviving ownership transfers.
7. Negotiate green lease provisions. Work with tenants to incorporate energy efficiency clauses, cost-sharing mechanisms for retrofit investments, and data-sharing agreements for utility consumption monitoring.

FAQ

Which US cities have building performance standards in effect? As of early 2026, New York City (Local Law 97), Boston (BERDO 2.0), Washington DC (BEPS), St. Louis, Denver, and Montgomery County, Maryland have active BPS with enforcement mechanisms. Over 35 additional jurisdictions have adopted or proposed similar regulations. Compliance timelines vary: New York City's first penalties began in 2024, while many other cities have compliance deadlines between 2026 and 2030.

What is the typical cost and payback for a commercial deep energy retrofit? Costs vary widely based on building type, age, and scope. Medium-depth commercial retrofits (targeting 30 to 40% energy reduction) typically cost $15 to $35 per square foot. Deep retrofits targeting 50%+ reductions can range from $40 to $80 per square foot. Payback periods range from 5 to 15 years before incentives. IRA tax deductions and utility rebates can reduce effective costs by 25 to 40%, bringing payback below 10 years for most building types.

How does the IRA 179D deduction work for building retrofits? The 179D deduction provides up to $5.00 per square foot for commercial building energy efficiency improvements that achieve a minimum 25% reduction in energy costs compared to a reference standard. Projects must meet prevailing wage and apprenticeship requirements for the full deduction. The deduction is available for new construction and retrofits, and for tax-exempt building owners (schools, nonprofits, governments), direct pay or transfer provisions allow monetization of the credit.

What is the difference between operational and embodied carbon in buildings? Operational carbon is the emissions from energy consumed during a building's use (heating, cooling, lighting, plug loads). Embodied carbon is the emissions from manufacturing, transporting, and constructing building materials. For a typical new commercial building in 2026, embodied carbon can represent 40 to 60% of total lifecycle emissions. Reducing operational carbon requires efficiency upgrades and electrification, while reducing embodied carbon requires material substitution (low-carbon concrete, mass timber, recycled steel) and design optimization.

How should procurement teams evaluate retrofit contractors? Prioritize contractors with documented experience in deep retrofits and electrification, not just standard HVAC replacements. Request case studies with verified post-retrofit performance data. Confirm familiarity with IRA incentive documentation requirements. Evaluate willingness to include performance guarantees with M&V protocols in contracts. Check for workforce certifications relevant to heat pump installation (NATE, BPI) and building commissioning (AABC, ACG).

Sources

1. United Nations Environment Programme. "2025 Global Status Report for Buildings and Construction." UNEP, 2025.
2. US Department of Energy. "Building Technologies Office: Better Buildings Initiative Progress Report." DOE, 2025.
3. CBRE. "US Occupier Sentiment Survey 2025." CBRE Research, 2025.
4. Urban Land Institute. "Decarbonizing the Built Environment: Financing Strategies and Barriers." ULI, 2025.
5. Lawrence Berkeley National Laboratory. "Measured Performance of Commercial Building Retrofits in the United States." LBNL, 2025.
6. New York State Energy Research and Development Authority. "Clean Heat Program Annual Report 2025." NYSERDA, 2025.
7. Building Transparency. "EC3 Database: EPD Filing Trends and Embodied Carbon Benchmarks." Building Transparency, 2025.