Last updated: June 9, 2026. By Will Tygart. Written for co-op and condo boards and the managing agents who serve them — every claim links to a primary source.
If your co-op or condo building is over 25,000 square feet, Local Law 97 applies to you — but which version applies, and what it costs, depends on your building’s rent-regulation mix, and 2026 is the year one of the gentler pathways gets real. The legal challenge is over (the Glen Oaks suit — brought by a Queens co-op — lost at New York’s highest court in May 2025, with no appeal possible), the Council bill to delay penalties for moderate-value condos and co-ops died at the end of session, and multifamily buildings filed their first-year reports at a 94% rate. The question for boards is no longer whether LL97 is happening. It is which pathway you are on, and what the next capital plan should assume.
First question: which pathway is your building on?
LL97 is not one rule for all residential buildings — coverage splits on rent regulation and affordability status (DOB LL97 page):
| Pathway | Who is on it | What applies |
|---|---|---|
| Article 320, standard (Pathway 0) | Most market-rate co-ops and condos >25,000 sqft (or condo buildings sharing a board totaling >50,000 sqft) | Emissions caps from 2024, annual RDP-certified reports, $268/tCO2e overage penalties |
| Article 320, 2026 start (Pathway 1) | Buildings with at least one but no more than 35% rent-regulated units | Cap compliance began January 1, 2026 — this year is their first capped year |
| Article 320, 2035 start (Pathway 2) | Certain buildings under §28-320.3.9 | Caps begin 2035 |
| Article 321, prescriptive (Pathway 3) | >35% rent-regulated, HDFC co-ops, Mitchell-Lama, income-restricted, project-based federal housing | One-time prescriptive energy measures (a defined checklist of upgrades) instead of caps; $10,000 penalties for non-compliance |
Your pathway is shown on the Covered Buildings List published each year on DOB’s LL97 page; disputes go through a BEAM portal ticket. If your building has a mix of rent-regulated units, checking the percentage against DOF records is the single highest-value hour a managing agent can spend this year — Pathway 1 buildings are in their first capped year right now, and many boards do not know it.
The math boards actually face
The multifamily emissions cap for 2024–2029 is 0.00675 tCO2e per square foot (1 RCNY 103-14). For a 120,000 sq ft co-op, that is an annual limit of 810 tCO2e. Exceed it by 100 tons and the penalty is $26,800 a year. Fail to file at all and the penalty is 120,000 × $0.50 = $60,000 per month — which is why “we’re under the cap so we don’t need to do anything” is the most expensive sentence in co-op governance. Filing is mandatory regardless of emissions; for most buildings under the cap it costs the $210 fee plus the engineer.
About 9% of covered properties exceed today’s caps — but roughly 57% exceed the 2030 caps (Urban Green Council). For residential boards the 2030 number is the one that belongs in the reserve study, because the realistic retrofit menu — heat pump conversions, window and envelope work, boiler replacement timed to end-of-life — takes more than one budget cycle to finance and execute. Habitat’s reporting captured the honest owner calculus: some owners are choosing fines over retrofits because, as one put it, eliminating the fine would cost “15 to 20 times the fine amount” (Habitat, March 2025). That math can be rational in 2026 — and flips as the caps tighten and the fines repeat annually, forever.
What boards hoping for a rescue should know
- The lawsuit is over. Glen Oaks Village Owners — a Queens garden co-op — argued the state climate law preempted LL97. The NY Court of Appeals rejected the challenge on May 22, 2025 (opinion); as a state-law ruling from the highest court, it cannot be appealed further.
- The relief bills stalled. Int 1197 (Lee/Ung), which would have delayed penalties for condos and co-ops with average unit assessed value under $65,000, was never moved by the Speaker; Int 1180’s REC cap also died at end of session. No amendment has touched the $268 rate, the caps, or the May 1 cycle.
- Enforcement has started. DOB’s April 22, 2026 release: 93% of covered properties filed, ~1,400 non-filers are receiving Notices of Deficiency, and OATH penalty cases are being prepared (DOB press release).
The board playbook for 2026
- Confirm your pathway and your filing status today. If the CY2025 report is not filed, the grace period ends June 30, 2026 — a $60 extension (applied for in BEAM by June 30) buys you until August 29. See the full deadline guide.
- Get the real number before the meeting. An energy audit that converts “we might be over” into “we are 110 tons over, which is $29,480 a year, and these three measures close 80% of it” changes the quality of every board conversation that follows.
- Time retrofits to equipment life, not to panic. The cheapest decarbonization is the boiler you were going to replace anyway, replaced with the electric option, with the beneficial-electrification credits that remain richest before December 2026.
- Know the mitigation menu before you need it: good-faith-efforts (requires filed reports + current LL84 + LL88 attestation plus a qualifying path like an RDP-certified decarbonization plan); RECs (electricity-attributable emissions only, NYC-deliverable); AHRF offsets (capped at 10% of your limit, $268/ton); and after a fire or flood, the disaster provision that can zero a penalty year with documentation (1 RCNY 103-14(i)(1)).
- Use the free help. NYC Accelerator provides no-cost LL97 compliance guidance, and the Building Energy Exchange published a co-op/condo-specific playbook, Cutting Carbon in Co-ops & Condos, in May 2026.
What this means for each seat at the table
| If you are the… | LL97 in 2026 means… |
|---|---|
| Board (the owner) | The penalty exposure and the capital plan are yours. Put the 2030 number in the reserve study now; annual fines are a recurring line item, not a one-time fee. |
| Managing agent (the coordinator) | Pathway verification, the three-portal filing chain, the RDP booking, and the mitigation paperwork run through you — including the disaster documentation if the building ever floods or burns. |
| Shareholders / unit owners (the residents) | LL97 costs reach you through maintenance and common charges either as planned retrofit financing or as unplanned fines — and the planned version is almost always cheaper. The A–F energy grade at the entrance is your building’s public report card. |
Frequently asked questions
Does Local Law 97 apply to co-ops and condos?
Yes — co-op and condo buildings over 25,000 square feet (or condo buildings under one board totaling over 50,000 square feet) are covered. The applicable pathway depends on rent-regulation and affordability status: most market-rate buildings face Article 320 caps; buildings over 35% rent-regulated, HDFC, and Mitchell-Lama follow Article 321’s one-time prescriptive measures instead.
What is the LL97 penalty for a co-op?
The same as any Article 320 building: (actual emissions minus the cap) × $268 per ton CO2e per year, and $0.50 per square foot per month for failing to file. Article 321 buildings face $10,000 penalties for late or missing compliance reports.
What changed for partially rent-regulated buildings in 2026?
Buildings with at least one but no more than 35% rent-regulated units (Pathway 1) began cap compliance on January 1, 2026 — 2026 is their first capped calendar year, reportable in 2027.
Did the co-op lawsuit against LL97 succeed?
No. Glen Oaks Village Owners v. City of New York was decided against the challengers by the NY Court of Appeals on May 22, 2025, and cannot be appealed further. LL97 is settled law.
Will LL97 raise my maintenance or common charges?
For buildings over their caps, yes — the only question is whether the increase funds planned retrofits (often with incentives, and timed to equipment replacement) or recurring annual fines. The retrofit usually wins over a ten-year horizon, especially with 2030’s stricter caps.
Where can a board get free LL97 help?
NYC Accelerator (accelerator.nyc/ll97) offers free compliance guidance, and the Building Energy Exchange’s May 2026 “Cutting Carbon in Co-ops & Condos” playbook is written specifically for residential boards.
Primary sources
- DOB — Local Law 97 (pathways, Covered Buildings List)
- 1 RCNY 103-14 — caps, coefficients, mitigation
- Glen Oaks v. City of New York (NY Court of Appeals, 2025)
- DOB press release, April 22, 2026 — filing results and enforcement
- Urban Green Council — LL97 analysis (2030 projections)
- Habitat — owners weighing fines vs. retrofits
- NYC Accelerator — free LL97 help