NYC Building Complaints by Address

Each portal covers a different layer of the building. HPD Online has habitability violations (heat, pests, lead paint). DOB NOW has construction complaints, permits, Certificate of Occupancy, illegal occupancy. 311 has resident-filed service requests — often the earliest signal of a problem, weeks or months before HPD or DOB issue a formal violation. ACRIS has ownership and mortgage history. A building can be HPD-clean but have DOB violations, or vice versa. Checking all four gives the full picture.

311. Residents file 311 complaints within hours of noticing a problem. HPD takes 7-30 days to inspect and, if they find a code violation, then 7-30 more days to issue a formal record. DOB timelines are similar. So a building with 20 recent 311 complaints but only 3 HPD violations may actually be in worse shape than the HPD record suggests — the violations are still in the pipeline.

BBL stands for Borough-Block-Lot. Every NYC tax lot has a unique 10-digit BBL: borough code (1-5) + 5-digit block + 4-digit lot. Example: 1001230042 = Manhattan, Block 123, Lot 42. BBL is persistent — it survives renumbering, mergers, and rebranding. When an address search fails on a city portal, switching to BBL almost always works. Find a BBL on ACRIS, NYC DigitalTax Map, or the PLUTO dataset.

BIN is the Building Identification Number — a 7-digit DOB-assigned ID that identifies a physical structure, not a tax lot. One BBL can contain multiple BINs (multiple buildings on one lot) or one BIN can span multiple BBLs (a building straddling a lot line). DOB portals usually accept address or BIN. HPD uses BBL. ACRIS uses BBL. If you need to search across systems, have both BBL and BIN ready.

Go to ACRIS (a836-acris.nyc.gov) and search by address — the result shows the BBL. Alternatively, use NYC's PLUTO dataset, the DigitalTax Map, or Property Shark (free tier). Once you have the BBL, you can search any city portal that requires it — PLUTO, DOB BIS, ACRIS, DHCR rent history requests, and city tax records all accept BBL as input.

Five categories, roughly in severity order: (1) active Stop Work Orders on DOB — construction problems the owner has not resolved, (2) open Class C HPD violations — immediately hazardous habitability issues, (3) illegal occupancy complaints on DOB — the apartment may not have a valid Certificate of Occupancy, (4) 10+ unresolved 311 complaints in the past 12 months — tenant distress signals, (5) AEP (Alternative Enforcement Program) listing — HPD's 250-building watchlist of worst maintenance.

Yes, all of it. Every portal listed here is free, public, and maintained by NYC government. The canonical sources are hpdonline.nyc.gov, a810-dobnow.nyc.gov, portal.311.nyc.gov, and a836-acris.nyc.gov. Third-party aggregators sometimes charge for this data — you do not need to pay them for what the city publishes for free. The main reason to use an aggregator like DwellCheck is speed: instead of four portals in 5-10 minutes, you get one search in 30 seconds.

Yes — all HPD, DOB, ECB, and 311 records are public under NYC Open Data policy (Local Law 28 of 2018). ACRIS deed records are public under NY State Real Property Law. You do not need to be a tenant, attorney, or owner to search any of these. Third parties — renters, journalists, researchers, activists — regularly use this data for due diligence, reporting, and housing advocacy. Anonymity is also supported when filing new complaints.

HPD violations update daily. DOB records update daily. 311 service requests update every 24-48 hours, sometimes slower for non-emergencies. ACRIS updates within ~1 week of document recording. NYC Open Data datasets refresh on varying schedules — the specific refresh interval is documented on each dataset page at data.cityofnewyork.us. For time-critical due diligence (new listing, signing tomorrow), check all four portals on the same day rather than relying on cached aggregators.

Three possibilities: (1) new construction that has not yet been registered — check DOB for recent permits, (2) renumbering — the address recently changed; try the prior address or search by BBL, (3) the address is informal or commercial-only. If none of the portals return a result, use ACRIS property search with the cross streets to locate the BBL, then retry each portal with BBL. For new buildings, the Certificate of Occupancy may be pending — this itself is a signal worth understanding before renting.

Partially. ACRIS will show the LLC name on the deed, but not the individual owner behind the LLC. To find the human owner, search the NY State Department of State corporate database (dos.ny.gov) for the LLC name — if registered in NY, you will find the registered agent and sometimes member addresses. For shell-within-shell LLCs (common in NYC), this can require multiple lookups. See our Landlord Record Search guide for the full workflow.

Yes and no. HPD violations stay attached to the building (BBL) regardless of ownership change — a new owner inherits all open violations and must certify correction. DOB violations similarly persist. ECB fines transfer as liens against the property. 311 complaints are timestamped — they stay in the historical record but new owners are not penalized for prior owners' conduct. When researching a building, factor in ownership transition dates: a building sold 6 months ago may have recent records from a different owner.