HPD Class A and B violations, for tenants
Class C violations get the attention, and our guide to them explains why. But most of what makes an apartment unpleasant to live in is written up as Class B, and the paperwork problems that quietly compound against a building are Class A. Knowing how the two lower classes work makes the record much easier to read.
Class A: non-hazardous
Class A covers conditions HPD treats as non-hazardous. Typical examples are administrative and minor physical conditions: a missing sign or notice the law requires an owner to post, small surface defects, or paperwork failures like not filing a required report. The owner gets 90 days to correct and certify.
One Class A violation says almost nothing about living conditions. A pattern of them can still be informative, because several of the paperwork requirements exist to protect tenants: an owner who does not post required notices or file required reports is telling you how they run the building.
Class B: hazardous
Class B is the hazardous middle class, and it is where everyday habitability problems usually land: pest infestations, leaks and the damage they cause, defective plaster and peeling paint (where no young child is involved; with a child in the home, lead paint conditions become Class C), broken apartment doors and surfaces, and similar conditions. The owner gets 30 days to correct and certify.
The 30-day window is the practical difference. A Class C condition triggers fast deadlines and, if ignored, HPD's own emergency repair machinery. A Class B condition mostly relies on the owner responding to the violation, which is why open Class B violations age so badly in the data: nothing forces the repair on a fixed clock beyond penalties HPD has to go to court to collect.
How the classes work together on a record
Reading a building page, the classes answer different questions. Class C answers: is anything dangerous happening right now. Class B answers: how does the owner handle ordinary repairs. Class A answers: does the owner do the paperwork. A building with few C violations but a deep bench of old, open B violations has an owner who avoids emergencies and ignores everything else.
Age matters as much as count. Every open violation displays how long it has been open, and a Class B that has sat uncorrected for a year had twelve times the legal window. Volume of open B and C violations is also what HPD's Alternative Enforcement Program selects for annually, so a heavy record can move a building into the city's most aggressive enforcement track.
If you live with an uncorrected condition, the sequence is the same for any class: 311 complaint, inspection, and if it persists, an HP action in Housing Court. This guide is general information about public records, not legal advice.
Most of what this guide describes is visible on any building’s public record, free to read.