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Free LL97 Penalty Calculator
Estimate your building's NYC Local Law 97 emissions, limit, and maximum penalty for the 2024–2029 compliance period in under a minute.
Building Details
Enter your building info and annual utility consumption.
Enter your building data
Fill in the form and click Calculate to see an estimate of your LL97 emissions and limit.
How is the LL97 penalty calculated?
NYC Local Law 97 caps the carbon emissions of buildings over 25,000 square feet. A building that emits more than its limit owes a penalty of $268 per metric ton of CO₂e over it. This calculator estimates all three numbers for 2024–2029:
- Emissions:each fuel's annual use (electricity, natural gas, district steam, fuel oil) times its LL97 greenhouse gas coefficient, added up in metric tons of CO₂e.
- Limit:the building's gross floor area times the emissions limit for its property type.
- Penalty: the emissions over the limit times $268. At or under the limit, there is no penalty.
What changes in 2030?
The limits tighten again for 2030–2034, so a building under its limit today may be over it then. The penalty stays $268 per metric ton.
Estimates only — not an official LL97 determination. A Registered Design Professional certifies the filing.