LL97 Penalty Calculator
Estimate your building's Local Law 97 penalty: $268 per metric ton of CO2e over your annual limit, for both the 2024-2029 and 2030-2034 periods.
Option 1: Look up your building
The fastest and most accurate option: we already computed penalty estimates from your building's filed LL84 benchmarking data.
We match your address against 50,000+ NYC buildings and show the penalty estimate from your building's actual benchmarking data. Free, no signup. Or browse all buildings.
Option 2: Quick manual estimate
No address handy? Enter floor area, property type, and annual energy use from your utility bills.
Enter your floor area and at least one energy input to see penalty estimates for the 2024-2029 and 2030-2034 periods.
Manual estimates cover utility electricity and natural gas only. District steam and fuel oil are not included here, but they are in the per-building estimates from the address lookup.
Estimates only, not an official determination
Every figure on this page is a good-faith estimate for informational purposes only. It is not an official Local Law 97 determination and not legal, tax, or engineering advice. Your actual emissions limit and penalty are determined by the NYC Department of Buildings from a report certified by a registered design professional, and deductions (RECs, clean-energy offsets, approved adjustments) can reduce or eliminate penalties. See how we calculate this.
LL97 penalty questions
How are LL97 penalties calculated?
A building's annual emissions limit is its gross floor area multiplied by an emissions factor for its property type (tCO2e per square foot). The penalty is $268 for every metric ton of CO2 equivalent the building emits above that limit each year. Example: a building 100 tCO2e over its limit owes an estimated $26,800 per year.
What happens if I do not file my LL97 report?
Failing to file is a separate violation from exceeding the emissions cap. The late-filing penalty runs up to $0.50 per square foot per month until the report is filed, charged back to the May 1 deadline. For a 100,000 sqft building that is up to $50,000 per month.
Do LL97 limits get stricter in 2030?
Yes. The 2030-2034 emissions limits are roughly half of the 2024-2029 limits for most property types. Many buildings that are compliant today face six-figure annual penalties starting in 2030 without retrofits.
Can I reduce an LL97 penalty?
Yes. Renewable Energy Credits (RECs), clean-energy electrification offsets, and approved adjustment applications can reduce or eliminate penalties. DOB also weighs good-faith efforts in enforcement. Estimates on this page do not model these deductions, so your actual penalty may be lower.
Want the full picture? Read how Local Law 97 penalties work and the LL97 deadline calendar.
Manage more than one building?
CompliantLens rolls up LL97 exposure for your whole portfolio, ranked by dollars at risk, with board-ready exports.