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NYC Sustainability Law Deadlines: May 2026 Guide
LL84, LL88, and LL97 all have May 1 deadlines. Here's what NYC building owners must file, post, and report before the clock runs out.
By Brandon Babel7 min read
In This Article
Three of New York City's most consequential sustainability laws share the same deadline: May 1, 2026. Local Law 84, Local Law 88, and Local Law 97 all require action from building owners this spring — and missing any one of them triggers penalties that compound quickly.
This is not a drill. The DOB issued a formal Service Notice in February 2026 reminding owners of every sustainability filing deadline in the calendar year. Here's what you need to know and what you need to do before May 1.
The May 1 Deadline Stack
Most compliance calendars treat these laws separately. In practice, they land on the same date and touch many of the same buildings. Here's the full picture:
| Law | What's Due | Deadline | Who It Applies To |
|---|---|---|---|
| Local Law 84 | Energy benchmarking report (2025 data) | May 1, 2026 | Buildings 25,000+ sq ft |
| Local Law 88 | Lighting upgrade compliance report | May 1, 2026 | Buildings 25,000+ sq ft |
| Local Law 97 | Greenhouse gas emissions report | May 1, 2026 (initial) | Buildings 25,000+ sq ft |
| Local Law 33 | Energy grade label display | Oct 31, 2026 | Buildings that benchmarked |
| Local Law 87 | Energy efficiency report (EER) | Dec 31, 2026 | Buildings 50,000+ sq ft |
The May 1 triple-deadline is the most acute pressure point of the year. Owners who miss LL84 also automatically put LL33 at risk, since you can't receive an energy grade without a benchmarked submission.
Local Law 84: What Benchmarking Actually Requires
Local Law 84 requires owners of buildings 25,000 square feet or larger to benchmark annual energy and water consumption using the EPA's Energy Star Portfolio Manager tool, then submit that data to the City by May 1.
"Owners must share their property with the City in ESPM at least 15 business days before May 1." — DOB LL84 Benchmarking Law page
That 15-business-day window means the effective action deadline is around April 10 to allow for data sharing, utility uploads, and error correction before May 1. If you haven't started, you're late — but filing late is still better than not filing at all.
The penalty for non-compliance is $500 per quarter, per building. Small buildings — 25,000 to 50,000 square feet — can face $2,000 in annual fines for a single missed filing year.
What you need to complete LL84:
- An active Energy Star Portfolio Manager account for the property
- Full-year 2025 utility data (electricity, gas, steam, water) uploaded or pulled from utility providers
- Property details confirmed (gross floor area, occupancy type, year built)
- Data shared with NYC's account in ESPM before May 1
For more on the benchmarking deadline and related penalties, see the LL84 benchmarking deadline guide.
Local Law 88: Lighting Upgrades Are Already Past Due
Local Law 88 required all sub-metering and lighting upgrade work to be completed by January 1, 2025 — that deadline has passed. What's due May 1, 2026 is the compliance report certifying that the required upgrades were completed.
The report must be filed through DOB NOW and signed by a licensed professional (PE or RA). If your building completed the upgrades but never filed the report, you are currently in violation. If the upgrades were never completed, you are facing both the underlying violation and the reporting failure.
What the LL88 compliance report covers:
- Certification that all lighting systems meet the required efficiency standards
- Sub-metering installation confirmation (for tenant spaces over 10,000 sq ft in certain building types)
- Sign-off from a licensed engineer or architect
Penalties for non-compliance with LL88 range from $1,000 to $5,000, with continued violations accruing additional fines per inspection cycle.
Local Law 97: The Biggest Exposure for Large Buildings
Local Law 97 is the most complex — and the most costly if ignored. It caps greenhouse gas emissions for buildings over 25,000 square feet starting in 2024, with progressively tighter limits through 2050. The May 1, 2026 deadline is for filing the annual emissions report covering calendar year 2024.
Filing is done through the BEAM portal at nyc.beam-portal.org. Owners must report total building emissions (in metric tons of CO₂ equivalent) and either certify compliance with the 2024–2029 limit or disclose an exceedance.
Penalties for exceeding the LL97 limit are $268 per metric ton of CO₂ equivalent over the cap — with no ceiling. A large building significantly over its limit can face six-figure annual penalties.
If you need an extension, the deadline to request one is June 30, 2026, with the extended filing deadline of August 29, 2026. Extensions are not automatic — you must apply through BEAM before June 30.
Three scenarios to understand before May 1:
- Under your cap: file the report, certify compliance, done.
- Over your cap: file the report, disclose the exceedance, and begin planning for a mitigation pathway (carbon credits, retrofits, renewable energy credits).
- Unsure: get a benchmarking consultant or energy auditor to calculate your 2024 emissions against the building's specific LL97 limit now — don't guess.
The Local Law 97 and LL84 May 2026 deadline post covers the interplay between these two laws in more detail.
Local Law 33: What Happens After May 1
Once you've benchmarked under LL84, the City issues an energy efficiency grade (A through F, or N for not yet rated) in the fall. For 2026, grades are issued October 1 and must be posted in a visible location near every public entrance by October 31, 2026.
This is not optional. Failure to display the label is a separate DOB violation — and because the label is publicly visible, it's easy for inspectors to identify non-compliant buildings during street-level checks.
Posting requirements:
- Label must be at least 8.5 x 11 inches
- Displayed in a conspicuous location near each public entrance
- Must match the label issued by the City for that cycle — owners cannot use a prior year's label
More on LL33 in the NYC compliance checklist for small building owners.
Local Law 87: December 31 Is Closer Than It Looks
Local Law 87 requires buildings over 50,000 square feet to conduct an energy efficiency report (EER) every 10 years. The 2026 filing deadline is December 31, 2026 for buildings in the cycle ending this year.
An EER requires a full energy audit and retro-commissioning study by a licensed professional. These take time to schedule, complete, and file. If your building is in the 2026 cycle, the window to hire a qualified firm and complete the work before December 31 is narrowing.
Check your building's LL87 cycle on the DOB Sustainability Law Deadlines Service Notice to confirm whether you have a December 31 obligation this year.
What to Do Before May 1
If you haven't acted yet, here's the priority order:
- Log into Energy Star Portfolio Manager and confirm 2025 data is complete and shared with NYC — this unlocks LL84 compliance and sets up your LL33 grade
- Check your LL88 compliance report status in DOB NOW — if it hasn't been filed, engage a PE or RA immediately
- Calculate your LL97 emissions for calendar year 2024 against your building's specific cap — use the BEAM portal or hire an energy consultant
- File your LL97 report through BEAM by May 1, or apply for an extension by June 30 if you need more time
Missing even one of these deadlines doesn't just cost money. It creates open violations on your property record that affect financing, sales, and prospective tenants.
Ora Property Management tracks sustainability law deadlines for every building we manage — so nothing falls through the cracks at year-end or when three laws come due at once. If you need help pulling together your May 1 filings or want to understand your LL97 exposure, reach out to Ora.
Brandon Babel is the Founder & CEO of Ora Property Management, a NYC-based firm specializing in residential building management and compliance for small-building owners and condo/co-op boards.
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