New York Building Benchmarking Local Law 84 Explained

Submission deadline May 1st, 2025
The by-law concerning greenhouse gas emission disclosures and ratings of large buildings came into force in 2009 and gradually have requested smaller buildings to declare. New buildings are added yearly to the submission database.
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Affected Buildings

Buildings over 25,000 sqft

Deadline

May 1st, 2025

Fines

Up to $2,000 /building

The Local Law 84 (LL84) by-law is designed to reduce emissions by requiring property owners to disclose their energy performance. The goal is to benchmark all buildings and take action on non efficient ones in the future.

Local Law 84 lays the groundwork by benchmarking building performance, while Local Law 97 enforces action by mandating emissions reductions. Together, they work toward NYC’s climate goals, including achieving carbon neutrality by 2050.

Local Law 84

Ground work to benchmark all buildings over 25k sqft, and set the CO2 threshold

Local Law 97

Using LL84 reports, the city can sanction retrofit actions for non efficient buildings