What a NYC heat violation is
A NYC heat violation is a Housing Maintenance Code violation the city records against a building when it fails to provide required heat or hot water. HPD, the Department of Housing Preservation and Development, inspects on a tenant complaint, confirms the apartment is below the legal minimum, and enters a dated violation against the property. HVAC companies watch these records because each one is direct evidence that a building’s heating plant is failing during the season it is legally required to perform, and that the vendor responsible for it is not keeping up.
That is the whole reason the signal matters. A heat violation is not a marketing guess about who might need service. It is the city documenting, with a date and a class, that a specific building has a heating problem serious enough to be reported and inspected. The owner or managing agent now has a legal obligation to fix it. Someone is getting that call. The question is only whether it goes to the incumbent again or to you.
NYC heat season rules
New York City runs a defined heat season from October 1 through May 31. During those eight months, building owners must maintain minimum indoor temperatures under a two-part rule.
- Day rule (6 a.m. to 10 p.m.): if the outdoor temperature falls below 55 degrees, the indoor temperature in every apartment must be at least 68 degrees.
- Night rule (10 p.m. to 6 a.m.): the indoor temperature must be at least 62 degrees, regardless of the outdoor temperature.
Hot water is separate from heat and applies year-round, not just in heat season. Owners must supply hot water at a minimum of 120 degrees at the tap at all times.
When an apartment falls below these minimums, the tenant can file a complaint with 311. HPD attempts to contact the owner, and if the condition is not resolved, an inspector visits, measures the temperature, and records a violation if the building is under the line. The complaint and the resulting violation are both logged with dates, which is what makes the sequence readable from the outside.
Class A, B, and C violations
HPD sorts every Housing Maintenance Code violation into one of three classes by severity. The class tells you how urgent the condition is and how fast the owner must act.
| Class | Severity | Correction window | Heat/hot water? |
|---|---|---|---|
| A | Non-hazardous | Longer window to correct | No |
| B | Hazardous | Shorter window to correct | No |
| C | Immediately hazardous | Short window; per-day penalties | Yes — no heat and no hot water are Class C |
The detail that matters for HVAC work: no heat and no hot water are both Class C, the most serious category. The city does not treat a cold apartment in winter as a minor maintenance item. It treats it as an immediately hazardous condition.
An open Class C violation is not a suggestion. The owner has a short window to correct the condition and certify the correction back to HPD. Unresolved Class C violations carry civil penalties that accrue per day, and the building stays exposed until the fix is made and certified. Operationally, that means the owner or managing agent is under active legal and financial pressure to get the heat working now. They cannot table it to next quarter.
Why an open heat violation is the strongest HVAC signal
Most lead sources tell you a building exists. A heat violation tells you a building’s heating plant is failing, on a date, during the season it is regulated, with the city on record about it. That is a different class of information.
Line up what an open Class C heat or hot-water violation actually confirms:
- The equipment is failing right now. The violation was recorded because an inspector measured a real shortfall, not because a list is old.
- The incumbent vendor is failing right now. Someone already services this building’s heating plant. The violation is documented proof they are not keeping it compliant. Their relationship with the owner is at its weakest point.
- The owner must act, fast. Class C carries a short correction window and per-day penalties. There is no option to defer.
- The signer is knowable. The building’s registration lists the owner and managing agent, so the record maps to a named account and a decision-maker.
That combination is why we treat heat and hot-water violations as the top HVAC buying signal in the city. We sell B2B accounts, not one-off service calls, and a heat violation is the moment an account’s incumbent looks weakest to the person who signs the checks. The full mechanics of converting that opening into recurring work are in HVAC maintenance contracts.
How to look violations up and find the agent
The records are public. You can pull them two ways.
- HPD Online. Search a building address and you get its violation history, each entry marked with class (A, B, or C), the date recorded, and current status (open or closed). HPD Online also surfaces the building’s registration, which names the owner and the managing agent.
- NYC Open Data. The Housing Maintenance Code Violations dataset carries the same violation records in bulk, filterable by class, date, and status, which is how you watch many buildings at once instead of checking addresses one at a time.
Finding the violation is half the job. The other half is knowing who to call, and on a managed building that is never the tenant. It is the owner or the managing agent named on the registration. Use the HPD registration lookup to map a building to the owner and managing agent behind it, so an open Class C violation becomes a named account with a contact. On every lead we route, that comes with a verified email, and a direct phone where available.
Worked example. Say HPD Online shows a building with a Class C “no heat” violation recorded January 14, still open in February. That single record tells you the heating plant failed mid-season, the incumbent has not fixed it in weeks, and the owner is accruing penalties. Pull the registration, get the managing agent, and open the call with the fact: the building logged an open Class C heat violation on January 14. That is a documented reason to call, not a pitch.
The takeaway
A heat violation is the city putting in writing that a building’s heating plant is failing and its current vendor is not keeping up. Class C means the owner has to move now. Read the record, find the managing agent, and you are talking to a decision-maker at the exact moment the incumbent is exposed. That is the job B2B HVAC leads does for you: heat-violation signals, mapped to the signer, routed to one member per market.