Building Emissions and Energy Compliance: A National Guide for Property Managers

Building emissions and energy compliance laws are reshaping how commercial real estate operates in the United States. As of 2026, more than 40 cities and states have enacted some form of building energy benchmarking, disclosure, or performance standard — and the pace of adoption is accelerating. According to the Institute for Market Transformation (IMT), buildings covered by performance standards now represent over 3.2 billion square feet of commercial space nationally. For property managers, understanding and complying with these regulations is no longer optional — it is a core operational responsibility that directly affects asset values, operating budgets, and portfolio strategy.

This guide provides a comprehensive overview of the building emissions compliance landscape in 2026. It covers the major laws by city, the data requirements for compliance, the financial penalties for non-compliance, and the strategies property managers are using to reduce emissions while controlling costs. Whether your portfolio spans a single city or twenty states, this reference will help you navigate the regulatory complexity and build a compliance program that scales.

What Are Building Performance Standards and Why Are They Spreading?

Building performance standards (BPS) are regulations that set maximum allowable greenhouse gas emissions or energy consumption per square foot for existing commercial and multifamily buildings. Unlike energy codes that apply only to new construction, BPS target the existing building stock — which accounts for 75% of all buildings that will be standing in 2050, according to the Architecture 2030 initiative. The rationale is straightforward: buildings are responsible for approximately 35% of total U.S. carbon emissions when accounting for both direct combustion (heating) and indirect emissions from electricity consumption.

The BPS model originated in Europe, where cities like Amsterdam and London implemented performance requirements in the 2010s. In the U.S., Washington D.C. enacted the first major BPS through the Clean Energy DC Act in 2018, followed by New York City's Local Law 97 in 2019. Since then, the movement has expanded rapidly. The Biden administration's National BPS Coalition — launched in 2022 — now includes 48 state and local government partners committed to implementing performance standards. By 2026, cities with active or pending BPS include New York, Boston, Washington D.C., Philadelphia, Chicago, Denver, St. Louis, Los Angeles, and Seattle, among others.

New York City: Local Law 97 and the Carbon Penalty Era

Local Law 97 (LL97) is the most consequential building emissions law in the United States. Enacted in 2019 as part of the Climate Mobilization Act, it sets carbon emissions caps for buildings over 25,000 square feet in New York City — covering approximately 50,000 buildings and 60% of the city's total building area. The first compliance period began in 2024 with relatively lenient caps. The 2030 targets tighten dramatically, and the Urban Green Council estimates that approximately 20% of covered buildings will exceed their emissions limits and face financial penalties.

Penalties under LL97 are calculated at $268 per metric ton of CO2 equivalent (tCO2e) above the building's annual cap. For a 500,000-square-foot office building exceeding its cap by 1,000 tCO2e, the annual penalty would be $268,000. The penalties are not tax-deductible operating expenses — they are fines, payable directly to the city. This creates a powerful economic incentive for emissions reduction, particularly for buildings heated by fuel oil (#2 or #4) or steam, which carry substantially higher emissions factors per Btu than natural gas or grid electricity.

Calculating Your LL97 Exposure

LL97 compliance is calculated using the building's actual utility consumption data, converted to carbon emissions using emissions factors published annually by the NYC Mayor's Office of Climate and Environmental Justice. The calculation requires complete billing data for electricity, natural gas, steam, fuel oil, and any other energy source consumed on-site. Gaps in utility data — such as missing invoices or estimated reads — create compliance risk because the building cannot accurately calculate its total emissions. This is where utility bill management directly intersects with emissions compliance: clean, complete utility data is the foundation of every LL97 calculation.

Boston: BERDO 2.0 and Emissions Reporting

Boston's Building Emissions Reduction and Disclosure Ordinance (BERDO 2.0) applies to buildings over 20,000 square feet and large residential buildings with 15+ units. The law requires annual emissions reporting and sets declining emissions standards that buildings must meet on a five-year cycle. The first compliance period targets take effect in 2025, with standards that the city estimates will require approximately 35% of covered buildings to take action to reduce emissions.

BERDO 2.0 differs from LL97 in several important ways. Boston allows an alternative compliance pathway (ACP) where building owners can pay into a fund in lieu of meeting emissions targets — providing a financial safety valve for buildings where deep retrofits are not yet economically viable. The ACP rate is set at approximately $234 per tCO2e in 2025, with annual escalation. BERDO also grants the city authority to adjust emissions standards based on grid decarbonization progress, meaning that if the Massachusetts electric grid decarbonizes faster than projected, building-level targets may be relaxed accordingly.

Washington D.C.: The Clean Energy DC Act and BEPS

Washington D.C.'s Building Energy Performance Standards (BEPS) were the first in the nation to apply to existing buildings. The Clean Energy DC Act of 2018 established a framework where buildings exceeding a median ENERGY STAR score threshold must reduce their energy use intensity (EUI) by 20% over a compliance cycle. The law covers all commercial and multifamily buildings over 10,000 square feet — one of the lowest thresholds in the country.

D.C.'s approach is notable for its flexibility. Buildings can comply through energy efficiency improvements, on-site renewable energy, the purchase of renewable energy certificates (RECs), or a combination. The city also runs a Building Innovation Hub that provides free technical assistance to building owners, including energy audits and retrofit planning. According to the D.C. Department of Energy and Environment, 73% of covered buildings reported sufficient data to determine compliance in the first cycle — meaning 27% faced data quality issues that prevented compliance determination, underscoring the importance of systematic utility data management.

Emerging Markets: Philadelphia, Chicago, New Jersey, and Beyond

The BPS movement is expanding beyond the early-adopter cities. Philadelphia's Building Energy Performance Program (BEPP) requires buildings over 50,000 square feet to benchmark annually and meet declining energy performance targets. Chicago's Building Performance Standards ordinance, enacted in 2023, covers buildings over 50,000 square feet and phases in performance requirements beginning in 2026. New Jersey's benchmarking requirements apply to state-owned and large commercial buildings, with performance standards under development.

California has taken a different approach through AB 802, which requires annual benchmarking and public disclosure of energy performance for commercial buildings over 50,000 square feet but does not set performance caps or assess penalties for high emissions. Instead, California relies on mandatory disclosure to create market pressure for efficiency improvements — the theory being that tenants and investors will avoid buildings with poor energy performance when that data is publicly available. Early research from the Lawrence Berkeley National Laboratory suggests that benchmarking disclosure alone drives 2-3% energy reductions in covered buildings.

The 2026-2030 Wave

According to IMT's BPS tracking database, at least 15 additional cities are actively developing building performance standards as of 2026, with expected adoption dates between 2026 and 2030. Cities in various stages of BPS development include Atlanta, Minneapolis, Portland, San Francisco, and Raleigh. For national portfolio operators, the question is no longer whether your buildings will be subject to emissions regulations — it is when. Proactive property managers are implementing portfolio-wide energy tracking and emissions monitoring now, rather than scrambling to comply market-by-market as each new law takes effect.

What Data Do You Need for Emissions Compliance?

Every building performance standard in the United States requires the same foundational data: 12 months of utility consumption data for all energy sources, reported in standard units (kWh for electricity, therms for natural gas, gallons for fuel oil, and Mlbs for steam). This data must be accurate, complete, and aligned to the calendar year or compliance period specified by the jurisdiction. Estimated reads, missing months, and unit conversion errors are the three most common data quality issues that prevent buildings from achieving compliance.

Beyond raw consumption data, most jurisdictions require supplementary information including: gross floor area (GFA), building use type per ENERGY STAR classifications, occupancy percentage, operating hours, and in some cases, metered water consumption. ENERGY STAR Portfolio Manager is the designated reporting platform for the majority of benchmarking and BPS programs — approximately 30 of the 40+ jurisdictions with active programs use Portfolio Manager as their submission portal. This standardization simplifies reporting for portfolio operators, but it also means that data quality issues in Portfolio Manager flow through to compliance determinations across multiple jurisdictions simultaneously.

The ASHRAE 100 Connection

ASHRAE Standard 100 provides a nationally recognized framework for setting energy performance targets for existing buildings. Several BPS jurisdictions have adopted ASHRAE 100 as the basis for their performance standards, and the 2024 update to the standard includes a carbon emissions overlay that aligns with building-level emissions accounting. Property managers who build their compliance programs around ASHRAE 100 principles gain a durable framework that will remain relevant as new jurisdictions adopt performance standards and as existing jurisdictions update their targets.

Strategies for Achieving Emissions Compliance

BPS compliance strategies generally follow a three-phase approach: quick wins (0-6 months), operational optimization (6-18 months), and capital investment (18-60 months). Quick wins include lighting retrofits (LED upgrades typically reduce lighting energy by 50-70%), HVAC scheduling optimization (reducing run hours in unoccupied periods), and thermostat setpoint adjustments. According to DOE data, operational changes alone can reduce building energy consumption by 10-20% without any capital expenditure.

The second phase focuses on equipment-level optimization: variable frequency drives on fans and pumps, demand-controlled ventilation, economizer commissioning, and building envelope air sealing. These measures require moderate capital investment ($2-5 per square foot) but deliver energy reductions of 15-30% with payback periods of 3-7 years. The third phase involves major capital projects such as boiler-to-heat-pump conversions, building envelope upgrades, and on-site renewable energy installations. Electrification of heating systems is the single highest-impact measure for buildings that currently burn fossil fuels on-site, because it eliminates Scope 1 emissions entirely.

Renewable Energy Credits and Offsets

Some BPS jurisdictions allow buildings to use renewable energy credits (RECs) or carbon offsets to meet emissions targets. The rules vary significantly: NYC's LL97 allows the purchase of RECs from renewable energy sources within the NYISO zone, effectively crediting the building for clean electricity generated elsewhere in the state. Boston's BERDO allows an alternative compliance payment in lieu of emissions reductions. D.C.'s BEPS permits REC purchases with certain geographic restrictions. Understanding the specific offset and REC rules for each jurisdiction in your portfolio is essential for cost-effective compliance planning.

What Non-Compliance Actually Costs

The financial impact of non-compliance extends well beyond the stated penalty per ton of CO2e. For institutional-quality assets, non-compliance creates reputational risk with ESG-focused investors, reduces the pool of eligible tenants (many corporate tenants now require lease provisions demonstrating building sustainability performance), and may affect mortgage terms as lenders increasingly evaluate climate risk. CBRE research published in 2025 found that buildings in compliance with local BPS traded at a 4-6% premium to comparable non-compliant buildings, with the premium widening in markets with stricter enforcement.

The direct penalty exposure varies by city. In New York, a building exceeding its LL97 cap by 2,000 tCO2e faces an annual penalty of $536,000 — recurring every year until the building comes into compliance. In Boston, the alternative compliance payment for the same excess would be approximately $468,000. Over a five-year compliance cycle, the cumulative penalties can exceed the cost of the capital improvements required to achieve compliance, making early investment in emissions reduction the economically rational choice for most buildings.

Building a Portfolio-Wide Compliance Program

For portfolio operators with buildings in multiple jurisdictions, a centralized compliance program is essential. The program should include: a compliance calendar listing every filing deadline, reporting requirement, and penalty trigger date for every jurisdiction in the portfolio; a data management system that captures utility consumption data at the meter level and converts it to emissions using jurisdiction-specific factors; a gap analysis identifying which buildings are at risk of exceeding their emissions caps; and a capital planning process that prioritizes retrofit investments based on compliance risk and return on investment.

The first step is a portfolio-wide emissions inventory. Using 12 months of actual utility data, calculate each building's total emissions in tCO2e and compare it to the applicable performance standard. Buildings exceeding their cap by more than 20% require immediate attention. Buildings within 10% of the cap should be monitored closely and targeted for operational improvements. Buildings comfortably below the cap represent your lowest compliance risk but should still be tracked as standards tighten over time. According to ENERGY STAR, the median commercial building in the U.S. produces approximately 8.5 kgCO2e per square foot per year — but performance varies by a factor of 3-5x between the best and worst performers in any building category.

Frequently Asked Questions

What is a building performance standard (BPS)?

A building performance standard is a regulation that sets maximum allowable greenhouse gas emissions or energy consumption for existing commercial and multifamily buildings. Unlike energy codes for new construction, BPS apply to the existing building stock and require measurable improvements over time. As of 2026, more than 40 U.S. cities and states have enacted some form of BPS.

Which cities currently have building emissions laws?

Major cities with active building performance standards include New York (Local Law 97), Boston (BERDO 2.0), Washington D.C. (BEPS), Philadelphia (BEPP), Chicago (BPS), Denver, and St. Louis. California requires benchmarking under AB 802. At least 15 additional cities are actively developing BPS with expected adoption by 2030.

What are the penalties for non-compliance with LL97?

Local Law 97 penalties are $268 per metric ton of CO2 equivalent above the building's annual emissions cap. Penalties are assessed annually and are not tax-deductible. A large office building exceeding its cap by 1,000-2,000 tCO2e faces annual penalties of $268,000-$536,000.

What utility data is required for emissions reporting?

All BPS jurisdictions require 12 months of consumption data for electricity (kWh), natural gas (therms), fuel oil (gallons), and any other energy sources. Data must be actual (not estimated), complete (no missing months), and reported through ENERGY STAR Portfolio Manager in most cases. Supplementary data includes gross floor area, use type, and occupancy.

How do I calculate my building's carbon emissions?

Multiply each fuel type's consumption by its emissions factor. For electricity, use the local grid emissions factor from EPA's eGRID database. For natural gas, the factor is 5.3 kgCO2e per therm. For fuel oil, approximately 10.2 kgCO2e per gallon. Sum all fuel types to get total building emissions in tCO2e per year. Compare this total to your building's area-based emissions cap.

Can I use renewable energy credits (RECs) for compliance?

REC eligibility varies by jurisdiction. NYC's LL97 allows RECs from NYISO-zone renewable sources. Boston's BERDO offers an alternative compliance payment. D.C.'s BEPS permits RECs with geographic restrictions. Check the specific rules for each jurisdiction — some require local or regional RECs while others allow national certificates.

What is ENERGY STAR Portfolio Manager and why does it matter?

ENERGY STAR Portfolio Manager is a free EPA tool for measuring and tracking building energy and water consumption. Approximately 30 of 40+ jurisdictions with benchmarking or BPS laws require reporting through Portfolio Manager, making it the de facto compliance platform. Your ENERGY STAR score (1-100) indicates how efficiently your building performs relative to similar buildings nationally.

How far in advance should I start preparing for BPS compliance?

Start 24-36 months before the first compliance deadline. The first 6 months should focus on data collection and baseline emissions calculation. Months 6-18 should target operational improvements and quick wins. Months 18-36 allow time for capital project planning, permitting, and execution. Buildings that wait until the compliance year to begin preparation rarely have time to implement meaningful emissions reductions.