Compliance
Local Law 97 (LL97)
Definition
New York City's landmark building emissions law, enacted in 2019 as part of the Climate Mobilization Act. LL97 caps annual greenhouse gas emissions for most NYC buildings over 25,000 sq ft, with limits tightening in 2024, 2030, and beyond. Non-compliant buildings face penalties of $268 per metric ton of CO₂e over the cap.
Why It Matters for Your Business
LL97 applies to approximately 50,000 NYC buildings, representing the largest urban building emissions regulation in the world. Building owners must measure, report, and reduce emissions or face annual fines that can reach millions of dollars for large noncompliant buildings.
Frequently Asked Questions
When did LL97 penalties begin?
The first compliance period ran January 1, 2024 – December 31, 2024. Annual reports are due by May 1 of the following year. The NYC Department of Buildings (DOB) enforces the law.
Which buildings are exempt from LL97?
Buildings under 25,000 sq ft, NYC-owned properties (with separate requirements), rent-regulated buildings meeting specific criteria, houses of worship, and properties with active affordable housing programs may qualify for different treatment. Check the DOB LL97 portal for current exemptions.
What is a carbon trading option under LL97?
Buildings unable to reduce emissions can purchase Renewable Energy Credits (RECs) and carbon offsets to apply against their limits, subject to specific rules and caps defined by the DOB rules.