Enter your building type and square footage to see your NYC Local Law 97 emissions cap and what you’d owe annually if your building is over the limit. Penalty rate: $268 per metric ton CO₂e over cap, per year.
Apartment buildings, condos, co-ops (most common in NYC)
Local Law 97 (“LL97”), part of the Climate Mobilization Act of 2019, sets annual greenhouse-gas emissions limits for most NYC buildings over 25,000 square feet. It’s one of the most ambitious building decarbonization laws in the United States.
Enforcement began in 2024. Limits tighten in 2030 and again in 2035. Buildings that exceed the cap pay $268 per metric ton of CO₂e over the limit, every year.
The cap depends on the building’s occupancy group — an office building and a multi-family residential building of the same size have very different emissions allowances. Hospitals (I-2) and high-hazard buildings (H) have the highest allowances because their operations require more energy; storage and utility structures have the lowest.
Estimates only. Actual compliance involves DCAS reporting requirements, exemptions (rent-regulated housing, affordable housing, industrial process loads), deductions for clean distributed generation, and carbon trading schemes that this calculator does not model. Consult NYC DOB or a qualified energy consultant for your building’s exact LL97 profile.