Local Law 97 Penalties: How the $268 Per Ton Fine Works

The penalty formula

Every covered building gets an annual emissions limit: its gross floor area multiplied by an emissions factor for its property type (tCO2e per square foot, set by NYC DOB rule 1 RCNY 103-14). Actual emissions are computed from the building's energy use, with each fuel converted to CO2e by a statutory coefficient. Then:

annual penalty = max(0, emissions - limit) x $268

The penalty repeats every year the building stays over its limit. It is not a one-time fine.

A worked example

Take a 100,000 sqft multifamily building that uses 1,500,000 kWh of electricity and 40,000 therms of natural gas a year.

• 2024-2029 limit: 100,000 sqft x 0.00675 tCO2e/sqft = 675 tCO2e per year.
• Emissions: electricity 1,500,000 kWh x 0.000288962 = 433.4 tCO2e, plus gas 40,000 therms x 100 kBtu x 0.00005311 = 212.4 tCO2e. Total: about 645.9 tCO2e.
• 2024-2029 penalty: 645.9 is under the 675 limit, so $0. Compliant today.
• 2030-2034 limit: 100,000 sqft x 0.00334664 = about 334.7 tCO2e. Emissions with the 2030 electricity coefficient (0.000145 tCO2e/kWh) come to about 429.9 tCO2e, so the building is roughly 95.3 tons over.
• 2030-2034 penalty: 95.3 tCO2e x $268 = about $25,534 per year, with no change in how the building operates.

That pattern (fine today, exposed in 2030) is the most common LL97 profile in the city. Run your own numbers in the LL97 penalty calculator, or see penalties worked through real NYC buildings.

The 2030 cliff: limits roughly halve

LL97 tightens in steps. The 2024-2029 limits were designed so most buildings pass; the 2030-2034 limits are roughly half as generous for most property types.

Factors from NYC DOB's ESPM property-type table (1 RCNY 103-14). Retrofits take years to finance, permit, and build, so 2030 exposure is a today problem. See the four-year plan for the 2030 cliff.

Late filing is a separate penalty

Exceeding your cap is one violation. Failing to file the annual emissions report is another, and it is priced per square foot: up to $0.50 per sqft per month until you file, charged back to the May 1 deadline. For a 100,000 sqft building that is up to $50,000 per month, often more than the emissions penalty itself. Filing on time with a report prepared by a registered design professional avoids this entirely.

Unpaid penalties become liens and can block a sale

LL97 penalties do not just sit on the operating budget. Unpaid judgments can be recorded as liens on the property, accruing interest at 9% per year. The lien follows the building, not the owner: it shows up in every title search and has to be cleared before a sale or refinancing closes. Read how LL97 liens block building sales.

RECs and adjustments can reduce penalties

The honest caveat on every LL97 estimate: the law allows deductions. Renewable Energy Credits (RECs), clean-energy electrification offsets, and approved adjustment applications can all reduce or eliminate a penalty, and DOB weighs documented good-faith efforts in enforcement. Simple calculators (including ours) do not model these deductions, so treat every figure as an upper bound on the statutory penalty, not a bill.

Enforcement runs through OATH

DOB does not simply mail a fine. Violations are prosecuted at the Office of Administrative Trials and Hearings (OATH), NYC's administrative court, where cases become formal legal proceedings with notices, hearings, and judgments. The first LL97 OATH cases are already being filed against non-filers. See what the LL97 enforcement process actually looks like.