Parcel Data
NYC Building Data, Ranked
We aggregate New York City's open data into plain-English leaderboards — who the worst landlords are, which buildings have the most hazardous violations, and where lead paint is worst. Every list is built live from the city's own records and refreshed daily.
Build your own ranking
Slice the data yourself — rank landlords, buildings, units, ZIPs or boroughs by open or closed violations of any class, filtered by verified topic (lead paint, mold, heat, vermin…) or keyword. Every view is a shareable link.
Open the Data Explorer →NYC Buildings with the Most Open Violations
The NYC buildings with the most open HPD housing-maintenance violations right now (all classes).
View the ranking →NYC Landlords by Open Hazardous Violations
NYC property owners ranked by their open immediately-hazardous (Class C) HPD violations — a factual, public-data count.
View the ranking →NYC Lead-Paint Hotspots
The NYC ZIP codes with the most open lead-paint HPD violations.
View the ranking →NYC Access-Denied Buildings
Buildings where HPD inspections are most often blocked because no one gave access.
View the ranking →Why we publish this.NYC's housing data is public but hard to use. Parcel turns it into answers. Want the full picture on a specific building — violations, permits, ownership, financing, compliance deadlines? Search any NYC address → New to NYC compliance? Read the plain-English law guides →
Source: NYC Open Data (HPD Housing Maintenance Code Violations). Rankings reflect currently-open violations and are updated daily; they are not legal advice.