Agencies: HPD
What an HPD violation actually is.
The agencies: the flow · HPD · DOB · OATH/ECB · 311
Of the 867,572 Class C violations HPD has issued citywide, the immediately hazardous class, 275,527 are still open right now, 31.8%, pulled August 27, 2026 from our own copy of HPD's record.
What HPD enforces
HPD, the Department of Housing Preservation and Development, enforces the Housing Maintenance Code inside residential buildings: heat and hot water, pests, mold, lead paint, leaks, and the general condition of occupied units. It does not review permits or inspect ongoing construction; that scope belongs to DOB, a different agency working from a different code.
How a violation reaches the record
Most HPD violations start with a tenant's call to 311. HPD schedules an inspection, and only if an inspector confirms the condition does HPD issue a violation and mail the owner a Notice of Violation. From that point the case is searchable on HPD Online and part of the record this site reads. Some HPD inspections are proactive rather than complaint-driven, so not every violation traces back to a 311 call at all.
By class
HPD sorts every violation into one of four classes, and the class sets the correction window. Class A is not hazardous and gives 90 days. Class B is hazardous and gives 30 days. Class C is immediately hazardous and gives 24 hours. Class I covers registration and Alternative Enforcement Program orders, which clear by filing rather than by certification.
| Class | Violations |
|---|---|
| Class A (not hazardous, correct within 90 days) | 671,821 |
| Class B (hazardous, correct within 30 days) | 1,156,568 |
| Class C (immediately hazardous, correct within 24 hours) | 867,572 |
| Class I (registration / AEP orders) | 211,402 |
Class C is 29.8% of every HPD violation on the record.
The certification record
Of the 867,572 Class C violations HPD has ever issued, 397,044 have been certified corrected at some point, 45.8%. An owner corrects the condition and certifies with HPD directly; if the certify-by date passes with nothing filed, the status moves to Not Complied With, and HPD's own civil penalty process, including a CIV-14 notice, can follow. Every status a violation can carry is decoded in the status glossary.
Where HPD and DOB meet
HPD's violations and DOB's matters are two different codes tracked in two different tables, but they land on the same buildings often enough to matter. Right now, 99,216 properties carry an open HPD violation, and 12,355 of those, 12.5%, also carry an active OATH/ECB matter, DOB's own enforcement channel. The full flow between all four sources is on the agencies hub.
Who is on the record
138,168 distinct owners appear on HPD's violation record in our working copy, matched by exact normalized name, never fuzzy-matched. 120,978 of them, 87.6%, carry more than one violation; the median owner on the record carries 5. A single violation on a single building is the exception, not the rule.
What a tenant does, and what an owner does
A tenant without a working condition can call 311 to start the process, and a photograph with the date of the call helps if a second inspection is needed. If HPD confirms nothing changed, calling again to request a reinspection is the next step, not a new complaint filed from scratch.
An owner who receives a Notice of Violation corrects the condition and files the certification directly with HPD, not with this site and not with 311. Missing the certify-by date does not erase the violation; it changes its status and can trigger HPD's own penalty process, covered above.
Also on record with HPD
Most 311 calls that end up on this site's HPD side eventually show up on both records. Of the 158,057 properties that have ever carried an HPD violation, 75.2% also carry a 311 request in just our trailing 311 window. The full 311-to-HPD comparison, in both directions, is on its own page.
What this page is not
This page counts violations. It does not identify a building, an owner, or a unit, and it is not a substitute for HPD Online, the authoritative source for any specific address. If you manage a building and want to check its own record, start here.
Aggregates only; no building or owner is named on this page. Sources: NYC Open Data, cited not linked. Status codes decoded, the record by borough, citywide, ViolationScout.