how will LL97 impact your building?
The LL97 Carbon Emissions Calculator estimates a building’s carbon penalty as a result of NYC LL97.
Automatically load building data from NYC’s benchmarking database or manually enter information to generate carbon thresholds, potential penalties, and utility cost metrics for three compliance periods.
Submit bug reports or comments here.

policy resources
Visit our Climate Mobilization Act Series portal, a collection of educational programs, event media, FAQs, and articles, taking a closer look at the Climate Mobilization Act and expanding on its constituent parts.
Hear from experts directly involved in the development of the legislation and those charged with its implementation to understand how NYC’s LL97 will impact your real estate portfolio.
next steps
What’s next? Once you’ve estimated your carbon footprint, connect with the NYC Accelerator for free, personalized guidance on implementing energy efficiency improvements that lower emissions, reduce operating costs, and enhance tenant comfort.