NYC Is Filing the First LL97 OATH Cases. Here Is What the Enforcement Process Actually Looks Like.
For two years, Local Law 97 enforcement felt theoretical. The DOB set deadlines, sent reminders, and warned of penalties. Then the first compliance deadline came due: CY2024 carbon reports were due May 1, 2025, and roughly 7% of covered buildings, about 1,400 in all, did not file.
Now the warnings are over. The NYC Department of Buildings has confirmed that DOB Sustainability attorneys are preparing formal case filings at the Office of Administrative Trials and Hearings (OATH) against non-filers. For the buildings on that list, the question is no longer whether enforcement is coming. It is what that process actually looks like.
What OATH Is (and Why It Is Not Like a Parking Ticket)
OATH is New York City's central administrative court system. It handles contested violations from virtually every city agency, from DOB building violations to health department infractions. An OATH case is a formal legal proceeding, complete with a respondent (the building owner or managing agent), a petitioner (the city agency), evidence, and a hearing before an administrative law judge.
That is meaningfully different from a standard DOB notice or a Department of Finance fine. When a building receives a routine notice of violation, the owner can often respond online, pay a fine, and close it out. An OATH case means DOB has determined that a formal contested proceeding is necessary. A hearing officer reviews the evidence, issues findings, and can order penalties.
The Escalation Sequence
Based on DOB's own enforcement statements, the process for LL97 non-filers has followed a defined escalation path.
Step 1: Notice of Deficiency (NOD)
DOB mailed Notices of Deficiency to buildings that did not submit their LL97 annual report by the deadline. A NOD gives the building owner a defined window to cure the deficiency: file the outstanding report, or provide documentation showing why the building should not be covered.
Step 2: OATH Case Filing
For buildings that did not respond to the NOD or did not successfully cure the deficiency, DOB attorneys are now preparing formal OATH case filings. Once filed, the case enters the OATH docket.
Step 3: Hearing Notice and Proceeding
The building owner receives formal notice of the OATH proceeding. The building has the right to appear and present a defense. The administrative law judge reviews DOB's evidence and any documentation the owner submits, then issues a recommended decision.
Step 4: Penalty Order
If DOB prevails, the hearing officer issues a penalty order. OATH decisions can typically be appealed within the system, though appeals extend the process and accumulating penalties continue during that time.
DOB has not published a specific case-by-case timeline for LL97 OATH proceedings. What is clear from their public statements is that the process involves department attorneys building formal case files, not sending automated notices.
The Financial Exposure
The non-filing penalty is separate from, and in addition to, any emissions penalty.
Non-filing penalty: up to $0.50 per square foot per month
The penalty accrues for every month the report is outstanding and can be charged back to the original May 1 deadline.
- A 25,000 sqft building: up to $12,500 per month
- A 100,000 sqft building: up to $50,000 per month
- A 200,000 sqft building: up to $100,000 per month
Emissions penalty (if applicable): $268 per ton
If the building is also over its annual carbon cap, it owes $268 per metric ton of CO2 equivalent above the limit. This obligation runs separately from the non-filing penalty and can compound alongside it.
Lien risk: 9% annual interest
Unpaid LL97 penalties can be recorded as liens on the property at 9% annual interest. Those liens must be satisfied before the building can be sold or refinanced. For buildings accumulating months of non-filing penalties, the lien exposure grows quickly and appears on every title search.
What If You Filed but May Have Errors?
The roughly 1,400 non-filers are the most immediate enforcement concern. But DOB has also confirmed that sustainability staff are auditing the approximately 28,000 CY2024 reports that were submitted.
Errors in submitted reports can lead to Notices of Deficiency through a separate accuracy-review track. Compliance consultants who have reviewed filed reports are finding:
- Wrong emissions factors applied to fuel types, especially buildings using steam, oil blends, or mixed heating systems
- Data mismatches between LL84 benchmarking filings and LL97 emissions reports
- Incorrect compliance pathway selection, which can dramatically change the penalty calculation
A building that filed on time but with errors could receive a NOD for an inaccurate report. If the error results in understated emissions, the penalty calculation may be adjusted upward. Filing on time is necessary. Filing accurately is what closes the exposure.
What to Do If Your Building Is in the Non-Filing Group
- Confirm your actual filing status. Check directly in the BEAM portal on the DOB website. A draft in the portal is not a submitted report. Prior-year extensions do not carry over to the next compliance year.
- Understand the two compliance years. CY2024 reports were due May 1, 2025, and DOB is in active enforcement against non-filers for that year. CY2025 reports were due May 1, 2026, with a grace period through June 30, 2026. Buildings that missed both deadlines have compounding exposure across two separate enforcement tracks.
- Contact a qualified professional before the hearing notice arrives. OATH proceedings are formal legal proceedings. A licensed LL97 compliance consultant or an attorney familiar with DOB administrative proceedings can advise on your specific situation and options. Arriving at a hearing unprepared, or waiting until the notice arrives, is not the optimal approach. Confirm qualifications with any professional you engage.
- File the outstanding report if at all possible. Addressing the deficiency before the hearing generally puts the building in a better position than waiting for a penalty order. Contact DOB directly about your current options.
- Separate the filing problem from the cap problem. Resolving the non-filing penalty does not close the emissions penalty if your building is over its carbon cap. Know both numbers. CompliantLens shows your estimated cap and penalty for both the 2024-2029 and 2030 periods (free).
What Comes Next for the Broader Enforcement Picture
The audit of the 28,000 filed CY2024 reports is ongoing. For CY2025 reports, the first compliance year with real penalty obligations tied to measured emissions, enforcement will continue under the same escalation model. Non-filers and inaccurate filers for CY2025 will move through the same NOD to OATH pathway.
Meanwhile, the programs that reduce compliance costs are still available but time-limited. The LL97 Beneficial Electrification Credit earns double credits for heat pumps, VRF systems, and heat pump water heaters installed through December 31, 2026. Con Edison multifamily heat pump incentives run up to $10,000 per unit through November 1, 2026. NYSERDA's multifamily rebate track offers up to $7,000 per unit for heat pump installations (check current eligibility with NYSERDA directly).
Buildings with open OATH cases or pending liens will find it significantly harder to access the refinancing and capital needed to fund those upgrades. Addressing enforcement exposure is often the prerequisite for getting the retrofit done at all.
The Bottom Line
Local Law 97 enforcement is no longer advisory. DOB's attorneys are building formal cases, OATH is processing them, and penalties are running in the background. The buildings that act now, to resolve filing deficiencies and understand their cap exposure, are the ones that preserve their options for financing, refinancing, sale, and 2030 compliance.
CompliantLens shows your building's LL97 penalty estimates for both compliance periods and the incentive programs that can offset the cost of getting into compliance. It takes about a minute.
Sources: NYC Department of Buildings, Local Law 97 enforcement press release (nyc.gov/site/buildings/dob/pr-ll97-improve-sustainability.page); NYC HPD press release 023-26, "New Compliance Data Shows Impact of Local Law 97 to Improve Sustainability in New York City" (2026); NYC Administrative Code §28-321.2 (LL97 non-filing penalty rate of up to $0.50/sqft/month; $268/tCO2e emissions penalty rate); NYC DOB LL97 guidance and BEAM portal (nyc.gov/site/buildings/codes/ll97-greenhouse-gas-emissions-reductions.page); NYC Office of Administrative Trials and Hearings (nyc.gov/oath); Urban Green Council LL97 compliance analysis. Dollar amounts reflect the maximum statutory rates and do not represent a guarantee of any specific penalty outcome. This content is for informational purposes only and does not constitute legal, tax, or financial advice. LL97 enforcement proceedings are legal matters; consult a qualified attorney and LL97 compliance professional for guidance specific to your building's situation.