What to Check Before Signing an NYC Lease

In NYC's rental market, tenants are frequently pressured to sign immediately or lose the apartment. That urgency is manufactured. The reality is that every residential building in New York City has years of public data available within minutes — violation history, complaint records, landlord court filings, ownership changes, and financial health indicators. A landlord who discourages you from doing this research is a landlord with something to hide. This checklist tells you every public database you should check, what red flags look like, and what you can legitimately use as leverage before signing.

1. Start With the BHX Score

Search the building's address on BuildingHealthX first. The BHX Score is a 0–100 composite rating that aggregates HPD violations, 311 complaint history, landlord litigation records, pest inspection results, eviction filings, and neighbourhood safety data into a single number. A score above 80 is generally healthy. A score below 60 warrants serious scrutiny. A score below 40 — especially combined with active red flag designations like AEP or Speculation Watch — should give you significant pause before signing.

Pay particular attention to the Category BHX Scores — especially Heat Reliability, Pest Control, and Stability. A building can have a moderate overall score while having a critically low Pest Control score of 7, which is far more relevant to your daily living experience than the composite average.

2. HPD Online — Violations and Complaint History

Go to hpdonline.nyc.gov and search the building address. Look at both the violations tab and the complaints tab separately — they tell different stories.

• Open violations: Any unresolved HPD violation is a building the landlord is legally obligated to fix. More than 2 open Class C violations is a serious concern — these are immediately hazardous conditions the landlord is ignoring.
• Violation history pattern: A building with 50 resolved violations is not necessarily worse than one with 5 open ones — the pattern matters. Look for the same category of violation repeating (e.g., heat complaints every winter, pest violations every summer). Recurring violations signal systemic problems, not isolated incidents.
• AEP designation: If the building appears on HPD's Alternative Enforcement Program list, that is a public declaration that the building has chronically high violation rates. AEP buildings are required to post this designation at the entrance.
• Complaint-to-violation ratio: A building with 200 complaints and 3 violations does not have a good landlord — it has an unresponsive landlord who didn't fix things until the inspector showed up. High complaint volumes with low violation counts are a red flag, not a green one.

3. 311 Complaint Data — What Tenants Actually Reported

HPD violations only appear in the record after an inspector confirms a condition. The 311 complaint data shows what tenants reported, often months before any inspector visited. On BuildingHealthX, the complaint history is aggregated and visualised — look at the trend charts, not just the totals.

• Heat complaints between October and March: More than 5 heat complaints in a single winter indicates a building that cannot maintain legal temperatures reliably. This is significant — heat failures are dangerous and legally the landlord's problem to solve.
• Pest complaints: Even one bed bug complaint is worth taking seriously. Bed bug complaints that recur in the same building over multiple years indicate a building-wide problem that treatment alone cannot solve.
• Noise complaints: High noise complaint volumes from bars, nightlife, or construction nearby will affect your daily life. This data is specific to the immediate block, not the broader neighbourhood.
• Water damage complaints: Recurring water damage complaints indicate a building envelope problem — roof, windows, or facade — that the landlord is not resolving.

4. Research the Landlord — Not Just the Building

The building's physical condition matters, but the landlord's track record across their entire portfolio matters more. A professionally managed building deteriorates when a negligent owner takes it over. Conversely, a historically problematic building can improve dramatically under responsible ownership. Check all of the following:

• Who Owns What (whoownswhat.justfix.org): See the owner's entire NYC portfolio. If they own 20 buildings and all of them have high complaint rates, the problem is management philosophy, not individual building age.
• NYC Housing Court records (iapps.courts.state.ny.us): Search the landlord's name and the building address. Multiple eviction filings in a single building often indicates a landlord using eviction as a pressure tactic. Frequent HPD litigation indicates a pattern of non-compliance.
• ACRIS ownership history: Search at a836-acris.nyc.gov. If the building was sold recently — particularly in the last 2 years — check whether violations spiked after the sale. Opportunistic buyers frequently purchase with renovation intent, and tenant disruption and deferred maintenance follow.
• Google reviews and community boards: Not legally definitive, but useful supplementary context. Search the landlord's name and management company name along with 'NYC reviews.'

5. What the Landlord Must Legally Disclose to You

NYC law requires landlords to disclose specific information before or at lease signing. A landlord who refuses to provide any of these is in violation of the law — and the refusal itself is a red flag:

• Bed bug history: Under Local Law 69 of 2017, landlords must disclose the bed bug infestation history of the specific unit and the entire building for the prior year.
• Lead paint disclosure: For buildings built before 1978, landlords must provide the EPA's 'Protect Your Family from Lead in Your Home' pamphlet and a signed disclosure acknowledging whether lead paint is present.
• Rent history: For rent-stabilized apartments, tenants have the right to request the complete rent history from the DHCR. If the landlord claims an apartment is not rent-stabilized, verify this independently at apps.hcr.ny.gov.
• Operating permits: The building must have a current Certificate of Occupancy (CO) filed with DOB. Ask for the CO number and verify it at a810-bisweb.nyc.gov.

6. The Physical Walkthrough Checklist

Never sign a lease without viewing the specific unit you will occupy — not a comparable unit, not a model unit. Bring this checklist:

• Run every tap for 60 seconds — check water pressure, drainage speed, and hot water temperature at the tap
• Test all radiators or HVAC units — feel for heat output and listen for knocking or banging in steam radiators
• Look up at every ceiling and along every wall for water stains — yellow or brown rings indicate past or ongoing leaks
• Open every cabinet under sinks and check the base for softness, staining, or mold odor
• Check window frames and sills with your finger — any give in the caulk or softness in the wood indicates water infiltration
• Crouch down and look along baseboards in the kitchen and bathrooms for droppings, grease trails, or entry holes — these indicate mice
• Check the inside of every closet corner — bed bugs prefer fabric contact points and dark enclosures
• Test every outlet with your phone charger — dead outlets indicate electrical issues
• Ask to see the boiler room or mechanical room — a well-maintained boiler room indicates a landlord who invests in the building