New York CityLocal Laws

Local Law 97


Local Law 97 (LL97) is an effort by New York City to reduce carbon emissions from buildings. LL97 impacts over 50,000 buildings and will be an increasingly important law for building owners in New York City. LL97 requires most buildings over 25,000 square feet to meet energy efficiency and greenhouse gas emissions limits starting in 2024. The limits will become more stringent by 2030 and 2050. To comply with LL97, building owners must submit an annual emissions report, which must be certified by a Licensed Design Professional.


Complying with the Law

ReVireo’s team includes Professional Engineers who are qualified to certify the annual emissions report. If a client has an existing building, ReVireo can perform benchmarking to determine if it complies with the LL97 requirements. If it does not comply, ReVireo can perform an energy audit and recommend retrofits to comply. ReVireo can perform an energy model for clients working on new construction to ensure the building will meet applicable requirements.

Local Law 87


Local Law 87 (LL87) was enacted to increase the energy efficiency of New York City’s largest buildings. LL87 requires large buildings to be audited, retro-commissioned, and submit a report to the city. Buildings over 50,000 square feet are mandated to periodically undergo these building performance measures.

LL87 requires the submission of the Energy Efficiency Report (EER) every ten years, which includes the audit and retro-commissioning information. A certified energy audit professional must prepare the energy audit and conduct the retro-commissioning one to two years before the EER is due. ReVireo is a qualified energy audit professional that can provide the required energy audit, retro-commissioning, and reporting services for LL87.


Local Law 84 and
Local Law 133


Local Law 84 (LL84) requires benchmarking. Benchmarking documents a building’s energy use and compares it to the average of similar buildings. Building owners can then identify their buildings’ relative energy performance.

Benchmarking is often required as part of local energy efficiency incentive programs. It is also required for Enterprise Green Communities and ENERGY STAR certifications for existing buildings. ReVireo can benchmark your building to comply with LL84 as well as to measure performance, identify improvement opportunities, and satisfy incentive or certification requirements. LL84 was amended in 2017 under Local Law 133 to apply to all buildings over 25,000 square feet.