Politics
Boston Tightens Emissions Rules: Large Buildings Face Net-Zero Standards
Owners of buildings meeting size thresholds in Boston must begin annual energy and water reporting while preparing for net-zero operational emissions standards.
How we reported this
Boston's Building Emissions Reduction and Disclosure Ordinance, known as BERDO 2.0, applies to existing non-residential buildings of 20,000 square feet or larger and residential buildings with 15 or more units. These properties must report energy and water use each year and reach net-zero emissions by 2050. Enforcement of the emissions standards starts in 2025 for buildings of 35,000 square feet or more or those with 35 or more units.
Rules for new development under amended zoning
As of July 1, 2025, the amended Zoning Article 37 requires new projects over 20,000 square feet or with 15 or more residential units that submit Article 80 applications to achieve net-zero carbon operational emissions. Projects larger than 50,000 square feet must also complete an embodied carbon Life Cycle Analysis. The changes directly affect property owners and developers submitting plans for larger-scale construction in the city.
Building owners subject to BERDO 2.0 can meet the 2025 emissions standards by purchasing Massachusetts Class I Renewable Energy Certificates generated between January 2024 and June 2026. In 2026, owners must provide independent third-party verification of data reported for the previous five years. These steps create specific compliance tasks for managers of covered properties.
Penalties and verification steps
Non-compliance with the emissions standards can result in fines of up to $1,000 per day for larger buildings and $300 per day for smaller covered buildings. Inaccurate reporting carries fines ranging from $1,000 to $5,000. Residents living in or near affected buildings may see these requirements reflected in building operations and management practices.
The ordinances focus on buildings that meet defined size criteria, covering both existing stock and new projects entering the review process. Owners must track usage data annually and prepare documentation for verification. The rules apply citywide to properties that meet the square footage or unit thresholds listed in the ordinances.
Next steps include the start of enforcement for larger buildings in 2025 and the required third-party verification process in 2026. Building owners can use the specified renewable energy certificates to address the 2025 standards while completing the verification of prior reporting years.