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)
Emissions from qualifying industrial process loads (data centers, manufacturing, commercial kitchens) are excluded from the cap.
Offsets from on-site clean distributed generation (solar, cogen) or purchased Tier 1 RECs reduce your net emissions.
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.
Carve-outs this calculator handles: rent-regulated and HUD-assisted buildings (25%+ regulated units) route to Article 321’s prescriptive compliance path at $0.50/sqft/yr instead of emissions caps; qualifying industrial process loads can be deducted from reported emissions; on-site clean distributed generation and purchased Tier 1 RECs count as emissions credits.
Estimates only. Actual compliance still involves DCAS reporting requirements, specific affordability carve-outs, the exact REC quantity limits for each compliance period, 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.