Local Law 97 Compliance

LL97 was signed in 2019. The first compliance period (2024–2029) began January 1, 2024. The first annual emissions reports were due May 1, 2025 (with a 60-day grace period to June 30, 2025 and an extension option to August 29, 2025). As of 2026, the law has entered active enforcement: the DOB is auditing ~28,000 filed reports, issuing Notices of Deficiency to ~1,400 non-filing buildings, and preparing OATH penalty cases. The May 1, 2026 Good Faith Effort verification deadline is the most critical near-term milestone. The next annual report (for 2025 energy use) is due May 1, 2026 with a grace period to June 30, 2026.

LL97 targets a 40% reduction in large-building greenhouse gas emissions by 2030 and an 80% reduction by 2050, putting NYC on a path to carbon neutrality. Because buildings produce roughly 70% of the city's GHG emissions, improving building energy performance has the greatest climate impact of any single policy lever available to NYC.

LL97 covers approximately 50,000 NYC buildings:

• Single buildings over 25,000 gross square feet
• Two or more buildings on the same tax lot (same BBL) totaling over 50,000 sq ft
• Condominium buildings governed by the same board of managers totaling over 50,000 sq ft

Tip: Check the DOB Covered Buildings List at nyc.gov/buildings — but do not rely on it exclusively. Owners are responsible for determining their own compliance status even if their building does not appear on the preliminary list.

Buildings exempt from LL97 include:

• Buildings under 25,000 sq ft
• Detached or semi-detached 1–3 story buildings with owner-controlled HVAC under 25,000 sq ft
• Certain industrial buildings powered mainly by electricity or steam from the grid
• Most city-owned properties (though some follow alternative pathways)
• Houses of worship and K-12 schools (follow Article 321 prescriptive pathway instead)
• Buildings with more than 35% rent-regulated units (Article 321 pathway, not full exemption)

Yes. Affordable housing buildings, rent-regulated buildings, and many co-ops are covered, but they may follow the Article 321 Prescriptive Pathway — a more flexible compliance route with alternative timelines and options compared to the standard Article 320 path for market-rate buildings. Some owner-occupied co-ops also qualify under Article 321. Buildings with more than 35% rent-regulated units are not exempt — they must still comply, just via Article 321.

LL97 operates in multi-year phases with increasingly strict emissions limits:

2024–2029: First compliance period. Current emissions caps are in effect. Approximately 20% of covered buildings exceed their cap in this period.

2030–2034: Stricter limits begin. Up to 80% of buildings are estimated to face fines if they make no changes. Compliance plans for this phase are due by 2028.

2035–2050: Limits tighten again in 2035 and 2040, reaching near-zero emissions by 2050.

May 1, 2026: Annual emissions report for calendar year 2025 energy usage due via DOB BEAM Portal. Also the critical Good Faith Effort (GFE) verification deadline — buildings on a GFE Decarbonization Plan must demonstrate all promised retrofit work is complete.

June 30, 2026: 60-day grace period ends for 2025 annual report. Last day to file without late penalties.

August 29, 2026: Deadline for extension requests filed via BEAM Portal (with $60 fee) by June 30, 2026.

2028: Buildings must show DOB approval for 2030–2034 phase work under GFE Decarbonization Plans.

December 31, 2026: Beneficial Electrification double-credit deadline — qualifying electric heat pump work done before this date earns double credits.

The annual GHG Emissions Report is due May 1 each year, covering the prior calendar year's energy use. A 60-day grace period allows filing through June 30 without penalty. If more time is needed, building owners may apply for a further extension via the DOB BEAM Portal by June 30 (with a $60 fee), granting a deadline of August 29. Late-filing penalties begin retroactively from May 1 if the report is not filed by the grace period end.

The annual report must be prepared and certified by a Registered Design Professional (RDP) — a licensed Professional Engineer (PE) or Registered Architect (RA). A qualified Retro-Commissioning (RCx) Agent may also be eligible in certain circumstances. Building owners cannot self-certify. The DOB treats these filings with similar rigor to audited financial statements; filing knowingly false information is a misdemeanor.

Excess emissions: $268 per metric ton of CO₂e above the building's annual cap — assessed every year until the building comes into compliance. There is no upper cap on these fines.

Late / missing report: $0.50 per sq ft per month from May 1 until the report is filed. For a 100,000 sq ft building, this is $50,000 per month.

False reporting: Up to $500,000 and/or imprisonment (criminal misdemeanor).

Example: A 200,000 sq ft office building 500 tons over its limit faces $134,000/year in excess-emissions fines — recurring every year until the building's carbon profile changes.

Yes. As of 2026, LL97 enforcement is fully active. The DOB has sent Notices of Deficiency (NODs) to approximately 1,400 buildings that failed to file their 2024 emissions reports, giving them 60 days to file before OATH penalty proceedings begin. Buildings that filed but exceeded their cap are now accruing annual fines. Unpaid fines can be attached to the building as a property tax lien. The DOB is also actively auditing the ~28,000 reports that were submitted to verify accuracy.

Yes — several pathways exist:

Good Faith Effort (GFE): If you submitted a Decarbonization Plan by May 1, 2025 and can show all retrofit work is complete by May 1, 2026, fines may be adjusted or deferred for 2024–2029. Important: GFE is a mitigation tool, not an exemption — and DOB can impose retroactive fines if efforts are deemed not genuine.

Carbon Offsets (AHRF): Buildings may purchase offsets up to 10% of their emissions limit at $268/ton through the Affordable Housing Reinvestment Fund (AHRF) — directing capital to HPD-qualifying electrification projects.

Renewable Energy Credits (RECs): RECs can offset up to 10% of emissions in 2024–2029 for buildings NOT on a GFE Decarbonization Plan pathway.

Mediated resolution: DOB allows mediated resolutions in certain cases, especially for buildings demonstrating active progress.

Article 321 / Prescriptive Pathway: Qualifying affordable housing and rent-stabilized buildings follow alternative compliance rules with more flexible requirements.

Missing any LL97 deadline triggers compounding consequences: late-filing fines of $0.50/sq ft/month from May 1; loss of Good Faith Effort eligibility; excess-emissions fines beginning to accrue; and potential OATH enforcement proceedings. Extension requests via the BEAM Portal ($60 fee, filed by June 30) can provide more time but do not erase excess-emissions liability — the extension delays the reporting penalty only, not the underlying carbon fine.

Step 1: Confirm coverage — check the DOB Covered Buildings List at nyc.gov/buildings and consult a licensed PE or RA.

Step 2: Benchmark your energy use in EPA Energy Star Portfolio Manager (required under LL84 annually).

Step 3: Hire an RDP to calculate your building's annual GHG emissions and compare to your specific emissions limit.

Step 4: If over the cap, implement upgrades — HVAC electrification (heat pumps), LED lighting, insulation, domestic hot water upgrades, and building management systems offer the highest ROI.

Step 5: File your annual GHG Emissions Report by May 1 via the DOB BEAM Portal, certified by your RDP.

Step 6: Plan ahead for 2030 — the limits tighten significantly; buildings that have not already acted will face far higher fines.

The GFE pathway, established in DOB rules released September 2023, allows buildings to mitigate fines during the 2024–2029 period while actively decarbonizing. To qualify, buildings must: (1) be current on all related filings (LL84 benchmarking, LL87 energy audits, LL88 lighting upgrades); (2) have submitted a Decarbonization Plan by May 1, 2025 detailing specific retrofits, budgets, and timelines; (3) demonstrate all work needed to meet 2024–2029 limits is complete by May 1, 2026; and (4) show work for 2030–2035 is approved by DOB by May 1, 2028. Caution: Buildings on a GFE Decarbonization Plan pathway cannot use Renewable Energy Credits (RECs) in 2024–2029.

Yes — multiple programs are available:

NYC Accelerator: Free personalized technical assistance and connections to financing for NYC building owners. This is the first stop for any building owner navigating LL97. Visit accelerator.nyc.

NYSERDA: Rebates, grants, and low-interest Green Jobs–Green NY loans for energy efficiency and electrification upgrades.

Con Edison & National Grid: Direct rebates for qualifying HVAC, lighting, and insulation upgrades.

Beneficial Electrification Credit: LL97 allows emissions deductions for qualifying electric heat pump systems. Work completed before December 31, 2026 earns double credit — a major incentive to act now.

IRA Tax Credits: Federal Inflation Reduction Act credits for heat pumps, insulation, and commercial energy efficiency remain available through 2032 (note: federal policy changes do not affect LL97 itself, which is a NYC law).

AHRF Offsets: Purchase carbon offsets at $268/ton through the Affordable Housing Reinvestment Fund to cover up to 10% of your emissions limit.

Co-op and condo boards are directly responsible for LL97 compliance, not individual unit owners. The board files the annual emissions report and bears liability for fines. Boards in pre-2000 Manhattan towers with gas-fired boilers are among the most exposed, with many running 15–25% over their 2024 caps. Boards typically pass fines through as a maintenance increase, special assessment, or via building refinancing. A 4–8% maintenance increase tied to LL97 is now common in affected buildings. Boards should consult legal counsel and engage an RDP immediately if they have not already done so.

Yes. While post-2019 buildings tend to be more energy-efficient and often meet the early 2024–2029 caps, they are not permanently exempt. As limits tighten in 2030, 2035, and 2040, even newer buildings may require additional upgrades to remain compliant. Owners of newer buildings should model their projected emissions against future limits now.

No. Because LL97 is a New York City law enacted under the NYC Administrative Code (§ 28-320), no federal administration can directly repeal or suspend it. NYC has continued to implement and enforce LL97 fully independently of changes in Washington. While federal climate funding and EPA programs may fluctuate, the city's own enforcement mechanism — the DOB, DOE, and OATH — operates entirely within city authority.

Compliance with several related laws is a prerequisite for LL97 Good Faith Effort eligibility:

Local Law 84: Annual energy and water benchmarking via EPA Energy Star Portfolio Manager for buildings over 25,000 sq ft. Deadline: June 30 annually. Non-compliance: $500/quarter up to $2,000/year. Benchmarking data feeds directly into LL97 emissions calculations.

Local Law 87: Energy audits and retro-commissioning every 10 years for buildings over 50,000 sq ft. Penalties start at $3,000 for late filings.

Local Law 88: Lighting upgrades and electrical submetering by May 1 filing date. Required for GFE eligibility.

Local Law 33: Public posting of Building Energy Efficiency Rating grades near each public entrance by October 31 annually. Non-compliance: $1,250/year.

Local Law 154: NYC gas ban for new construction — part of the same broader decarbonization policy framework.