What is an HPD Class C violation?

A Class C violation is the most serious category of housing violation that HPD — the NYC Department of Housing Preservation and Development — can place on a residential building. The label means an inspector found a condition the Housing Maintenance Code treats as immediately hazardous: something that threatens the health or safety of the people living there right now, not eventually.

What counts as Class C

HPD sorts Housing Maintenance Code violations into three classes. Class A is non-hazardous — think minor paperwork or cosmetic conditions. Class B is hazardous. Class C is immediately hazardous, and the classic examples are the ones tenants feel first: no heat during heat season, no hot water at any time of year, lead-based paint hazards in an apartment where a young child lives, rodent infestations, and broken or missing window guards where children under eleven reside.

The class is printed on the violation record itself, along with the condition the inspector observed and the apartment or location where it was found. On this site, open Class C violations are counted separately on every building page because they are the strongest single signal in the public record.

The correction clock

Each violation comes with a correction period, and for Class C it is short — generally 24 hours from when the notice is issued, with longer windows for a small number of conditions, such as lead paint hazards, that take real construction work to abate. Heat and hot water must be restored immediately.

If an owner does not correct a Class C condition, HPD can step in through its emergency repair programs, hire a contractor to fix the condition, and bill the owner for the work. Unpaid emergency repair charges can become liens against the property. HPD can also sue owners in Housing Court for civil penalties over uncorrected violations.

What certification means — and what it does not

An owner closes a violation by certifying correction: a sworn statement to HPD that the condition was fixed by the deadline. This matters for reading records honestly. Certification is a self-report. HPD re-inspects some certified corrections, but not all of them, so a violation can show as closed even if the underlying problem later returns. Filing a false certification is itself punishable.

That is why the pattern matters more than any single record. A building with one certified heat violation is unremarkable. A building that gets fresh heat violations every winter is telling you the certifications are not the whole story.

How to read Class C on a building page

When you look up a building here, check three things. First, the count of open Class C violations — open means not yet certified or dismissed. Second, their age: a Class C that has stayed open for months or years signals an owner who is not engaging with the process at all. Third, the mix: several open Class C violations across different apartments points to a building-wide problem rather than a one-off dispute.

Tenants living with an unaddressed immediately hazardous condition can call 311 to request an inspection, and repeated conditions can support an HP action — a Housing Court case asking a judge to order repairs. This guide explains public records; it is not legal advice.