Local Law 97 Explained: What It Means for NYC Building Energy Use

New York City’s Local Law 97 (LL97) is part of the city’s Climate Mobilization Act—its most ambitious step yet toward reducing greenhouse gas emissions from buildings.
Under LL97, most buildings over 25,000 square feet must meet strict carbon emission caps starting in 2024, with tougher limits coming in 2030 and beyond.

The goal is simple but challenging: make New York’s buildings cleaner and more energy-efficient to help achieve carbon neutrality by 2050.

Aerial skyline view of Manhattan skyscrapers at sunset