— TL;DR

Before you buy or rent a NYC apartment, check its HPD violation history. The best free and paid ways to do it in 2026 — and the red flags that actually matter.

01 · THE SHORT ANSWERCheck the building before you sign

Before you buy or rent a NYC apartment, pull the building's HPD violation history — it's public, free, and the single best predictor of how the building is run. The fastest path: check HPD Online (the official source) or a consolidated free lookup, and watch for the red flags that actually matter — open Class C violations, Alternative Enforcement Program status, and repeat heat/hot-water complaints. Here's how to do it and what to look for.

02 · HOW WE PICKEDThe criteria

Written by the ViolationWatch team — verify the specifics. We scored each on: coverage, ease, what it reveals, and cost.

03 · THE OPTIONSFive ways to check

1. HPD Online

  • What it is: Housing Preservation & Development's official portal.
  • Best for: The authoritative HPD violation and complaint record, by address.
  • Cost: Free.
  • Limitation: HPD only; you'll read raw violation codes and classes yourself.

2. A consolidated free lookup

  • What it is: A free address tool (like ViolationWatch's) that pulls HPD alongside DOB, ECB, FDNY and 311 in one view.
  • Best for: A complete picture without visiting four government sites.
  • Cost: Free for the one-time lookup.
  • Limitation: A snapshot; ongoing monitoring is the paid product.

3. NYC Open Data

  • What it is: The city's public HPD datasets, downloadable.
  • Best for: Researching history or comparing several buildings.
  • Cost: Free.
  • Limitation: Not built for a quick single-address answer.

4. A real-estate attorney or title company

  • What it is: Professional due diligence as part of a purchase.
  • Best for: Buyers — they'll surface open violations, liens, and litigation that affect title.
  • Cost: Part of closing costs.
  • Limitation: Overkill for a rental; tied to a transaction.

5. Ongoing monitoring (if you're buying)

  • What it is: Watching the building from contract through closing so nothing new lands unnoticed.
  • Best for: Buyers — new violations can appear during the deal.
  • Cost: $9/month per building.
  • Limitation: More than a renter needs for a one-time check.

04 · RED FLAGS THAT MATTERWhat to actually look for

  • Open Class C violations — immediately hazardous (no heat/hot water, lead paint, mold, bedbugs). Open Class C is the clearest "how is this building run" signal.
  • Alternative Enforcement Program (AEP) — the building is flagged for targeted enforcement; a serious red flag.
  • Repeat heat & hot-water complaints — especially clustered in heat season (Oct 1–May 31).
  • A high open-violation count per unit, and any open HPD litigation or liens.

05 · QUICK PICKERWhich to use

  • Renting, quick check: → HPD Online or a free consolidated lookup.
  • Buying: → attorney/title diligence + monitoring through closing.
  • Comparing buildings: → NYC Open Data.

Last updated: June 2026.

Check any NYC building's HPD history in one click with a free violation lookup, learn the classes in our HPD violations guide, or monitor a building through closing.

— Data & sources

The figures in this article come from ViolationWatch's analysis of New York City building-violation records — more than 15 million violations across DOB, HPD, ECB/OATH, 311 and DOT. Explore the full data, borough breakdowns, fine trends, and downloadable dataset in our NYC Building Violations Statistics report.

— Stop looking things up manually

Every violation, complaint, and fine at your building — the moment it appears in any source. $9/month per building. Try the free lookup or start a 7-day trial.

— Monitor this continuously

Real-time HPD coverage for your buildings

HPD monitoring

— Never miss a violation again

Catch NYC violations
the moment they exist.

ViolationWatch monitors DOB, HPD, ECB, OATH, FDNY, 311 and four more agencies in real time — for every building you add.

Start 7-day free trial Run a free address check