Caps tighten over time
The 2024-2029 cap is generous; the 2030-2034 cap roughly halves it. Most NYC office buildings that comply easily today face six-figure penalty exposure in 2030 without intervention.
Local Law 97 calculator
Project your LL97 carbon-cap penalty
Buildings over 25,000 sqft must comply with LL97 emissions caps. Enter your gross floor area, occupancy group, and annual greenhouse-gas emissions (from your LL84 benchmarking filing) and we'll project your 2024–2029 and 2030–2034 penalty exposure at $268 per metric ton CO₂e over the cap.
Awaiting inputs
Enter sqft + emissions on the left
We'll compute your annual cap, project your over-cap exposure, and translate it into dollars at $268 per metric ton.
Don't have your emissions number?
Your annual greenhouse-gas figure comes from your Local Law 84 benchmarking submission — the same data NYC uses to assess LL97. If your building is over 25,000 sqft, LL84 filing is mandatory every year by May 1. Skipping it is its own violation: $500 per quarter, capped at $2,000 per year, and it blocks the LL87 audit and LL97 compliance reports that build on it.
Occupancy group matters
A 100,000 sqft office (Group B) has a 2024 cap of 846 tCO₂e. The same building converted to multifamily (Group R-2) has a cap of 675 tCO₂e. Mixed-use buildings calculate per-portion.
LL84 data is the input
The 'actual emissions' you enter should match your annual LL84 benchmarking filing (column: Total GHG Emissions, Metric Tons CO₂e). If you've never filed LL84 — that's a separate violation worth $500/quarter.