🏙️ NYC Local Law 97

Your LL97 Penalty Exposure Calculator

Estimate your building's GHG emissions cap, annual fine exposure, and the exact improvements needed to avoid 2030 penalties — in 60 seconds.

$268 fine per excess ton CO₂e
57% of buildings exceed 2030 cap
2024 enforcement already started
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Building Details
LL97 applies to buildings over 25,000 sq ft
Find on your utility bills or ENERGY STAR Portfolio Manager. If blank, we use a typical benchmark for your building type.
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Your LL97 Numbers
Annual GHG Emissions
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metric tons CO₂e/yr
2024 GHG Cap
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metric tons CO₂e/yr
2024 Annual Penalty
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$268 × excess tons
2030 GHG Cap
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metric tons CO₂e/yr
⚠️ Projected 2030 Annual Penalty
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2030 Compliance
0
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Important: This calculator provides estimates based on NYC DOB LL97 GHG intensity limits and typical emission factors. Actual compliance determinations require site-specific energy data from utility bills or ENERGY STAR Portfolio Manager. Consult a licensed NYC energy professional for official compliance guidance. Data source: NYC DOB Local Law 97.
📋 LL97 GHG Limits by Building Type
Building Type 2024–29 Cap
tCO₂e/sf/yr		 2030–34 Cap
tCO₂e/sf/yr
⚡ LL97 Key Facts
Fine per excess ton $268 / metric ton CO₂e
Buildings covered >25,000 sq ft in NYC
First compliance period 2024 – 2029
Stricter cap begins January 1, 2030
Reporting deadline May 1 each year
Governing body NYC Dept. of Buildings
Data source required ENERGY STAR Portfolio Manager
🔬 NYC GHG Emission Factors
Electricity (grid) 0.000289 tCO₂e/kBtu
Natural Gas 0.0000532 tCO₂e/kBtu
Steam (ConEd) 0.0000449 tCO₂e/kBtu
Fuel Oil #2 0.0000736 tCO₂e/kBtu
NYC electricity emissions factor is among the highest in the US due to grid mix. All-electric buildings face higher GHG intensity per kBtu than gas-heated buildings under current LL97 factors — though this improves as the grid decarbonizes through 2040.

Frequently Asked Questions About LL97

What is Local Law 97 (LL97)? ▾
NYC Local Law 97, passed as part of the Climate Mobilization Act in 2019, requires buildings larger than 25,000 sq ft to meet greenhouse gas emission limits starting in 2024. The law targets the building sector, which accounts for roughly 70% of NYC's carbon emissions. Buildings that exceed their annual GHG caps face fines of $268 per metric ton of excess CO₂e.
How is my LL97 fine calculated? ▾
Your fine is calculated as: (Actual Annual GHG Emissions − Your Building's GHG Cap) × $268. GHG emissions are calculated from your energy consumption data across all fuel types using NYC-defined emission intensity factors. You report annually using data from ENERGY STAR Portfolio Manager or utility records.
Which buildings are exempt from LL97? ▾
Buildings smaller than 25,000 sq ft are not covered. Certain religious organizations, affordable housing with regulatory agreements (NYCHA, HDC-regulated), and buildings with valid hardship adjustments may qualify for different treatment. NYC DOB has published specific guidance for affordable housing providers.
Why are the 2030 limits so much stricter? ▾
LL97 is designed to ratchet down emissions in steps aligned with NYC's climate goals: 40% reduction in citywide emissions by 2030 and 80% by 2050. The 2024–2029 limits were set achievable with moderate upgrades. The 2030 limits require deeper electrification and efficiency investments — HVAC replacements, building envelope improvements, and in many cases fuel-switching from gas to heat pumps.
What's the fastest path to LL97 compliance? ▾
The fastest, most cost-effective improvements depend on building type, but generally: (1) LED lighting retrofits cut electrical load 20–40% with 2–4 year payback; (2) Building Automation Systems (BAS) optimize HVAC scheduling and reduce runtime by 15–30%; (3) HVAC upgrades or electrification (heat pumps) eliminate gas consumption, which matters especially for 2030 compliance; (4) Solar + storage can offset grid electricity use. A certified energy auditor can identify which measures give you the most GHG reduction per dollar spent.