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🇺🇸 New York City

Local Law 97 and New York's Building Emissions Caps

New York escalated its building energy rules in three steps: Local Law 84 (2009) made large buildings report energy and water use, Local Law 33 of 2018 as amended by Local Law 95 of 2019 put a letter grade at every public entrance, and Local Law 97 of 2019 capped greenhouse gases per square foot from 2024 at $268 per tonne of CO2e over the limit. Roughly 28,000 buildings filed first-year reports, which the Buildings Department is still auditing. The enforcement that has actually landed targets about 1,400 non-filers rather than over-emitters, and renewable energy credits let buildings offset instead of cut.

Live 📅 since 2009 ✔ Editor-reviewed

✔ Reviewed by the 1001 Smart Cities editorial desk · 🔎 Last verified

⚡ EnergySmart grid & energyOpen data

📊 Impact

About 28,000 buildings filed 2024 emissions reports, covering 93% of affected properties and 91% of covered buildings. Roughly 1,400 properties failed to file and received Notices of Deficiency. Sales of carbon offset certificates raised $1,460,048 for efficiency work in rent-regulated affordable housing (NYC Department of Buildings, April 2026).

🎓 Lesson

A cap becomes real only when a penalty is collected. New York won the preemption fight and got most buildings to file, but the fines that have moved so far are for not reporting, not for over-emitting.

Evidence🏛️ Official
Scale🏙️ City-wide
Cost≈$14.8M budgeted FY2027, rising to ≈$162.2M by FY2030
FundingNew York City expense and capital budget

Sources

↗ NYC Department of Buildings — first-year Local Law 97 compliance data (22 April 2026)Primary source for every impact figure: ~28,000 buildings filed for calendar year 2024, 93% of covered privately owned properties and 91% of covered buildings, ~1,400 non-filers issued Notices of Deficiency with a 60-day window, DOB attorneys preparing OATH filings, Sustainability Bureau still auditing, and $1,460,048 raised from carbon offset certificates at $268 per ton.
↗ NYC Department of Buildings — LL97 greenhouse gas emissions reductionsSupports the covered-building thresholds (single building over 25,000 gross sq ft; two or more on one tax lot over 50,000; condos under one board over 50,000) and the annual May 1 reporting duty.
↗ NYC Department of Buildings — Local Law 84 benchmarkingSupports the 2009 start of the benchmarking regime, the duty to report energy and water use annually via Energy Star Portfolio Manager, and that the resulting data is published publicly.
↗ NYC Department of Buildings — Local Law 33 energy gradingSupports the letter grade: created by Local Law 33 of 2018, posted near each public entrance, bands A at 85 or above down to D below 55, plus F for buildings that failed to submit benchmarking data.
↗ Glen Oaks Village Owners Inc. v City of New York, NY Court of Appeals (22 May 2025)Supports the resolution of the building owners' legal challenge: the state Climate Leadership and Community Protection Act does not preempt Local Law 97; the Appellate Division order was reversed and the motion to dismiss granted.
↗ Urban Green Council — Local Law 97 progress (updated January 2026)Independent analysis of city benchmarking data showing 43% of covered buildings already meet their 2030 limits, so the harder second compliance period still faces most of the stock.
↗ City Limits — renewable energy credit loophole activates (29 June 2026)Supports the offset counterweight: the Champlain Hudson Power Express began commercial operation in May 2026 and its credits go on sale in July or August 2026; Urban Green estimates half of excess building emissions, and 85% for offices, could be offset with credits by 2030.
📎 Cite this project

1001 Smart Cities (2026). “Local Law 97 and New York's Building Emissions Caps” — New York City, United States. The Smart City Atlas. https://1001smartcities.org/projects/nyc-local-law-97/ (last verified 2026-07-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

🔗 Related projects

🇺🇸 Local Law 144: Bias Audits for Hiring Algorithms · New York City Two New York mandates with the same gap: the penalties that land are for not filing, not for the thing the law set out to stop. 🇳🇴 Oslo Climate Budget · Oslo Oslo budgets its own emissions like money; New York caps each private building and prices every tonne over the line at $268. 🇸🇬 Green Mark & Super Low Energy Buildings · Singapore Two ways to move a building stock: Singapore has rated and rewarded since 2005, New York capped and priced the excess from 2024. 🇹🇭 Bangkok PM2.5 Monitoring & Graduated Response · Bangkok Thresholds bite where the city holds a lever: Bangkok can shut its own schools, New York can fine the 1,400 that failed to file.

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