NYC Building Score
See violations, complaints, and lawsuits brokers won't tell you about. Free.
Free — no credit card · 445,000+ buildings graded A–F · Free dashboard & watchlist · Refreshed daily
Don't get stuck in a bad building.
That ‘perfect’ apartment might come with, e.g., 47 heat complaints, 12 open violations, and a landlord in active litigation. The listing won't say a word. The record will. Shouldn't you know before you sign?
See what the listing hides.
Violations, complaints, litigation, liens, fire-safety — from 26 city sources, graded A through F.
Compare buildings fairly.
Every building scored against its true peers — a pre-war walk-up against other pre-war walk-ups.
Watch it after you move in.
Add any building to your free watchlist and get emailed when its grade drops or a new violation hits, checked weekly.
The NYC distress score, backtested to predict what happens next.
Validated out-of-sample: in a held-out backtest, an F-graded building was ~45× more likely than an A to develop a serious hazardous violation over the following ~10 weeks (AUC 0.83). As far as we know, the only NYC building score that publishes an out-of-sample validation like this.
These figures come from a backtest of an earlier version of the score. We're revalidating the current production model and will publish updated numbers.
Put the NYC building score in your app — or your agent.
Query grades, distress signals, and owner info for 445,000+ buildings through one clean API. Building an apartment-search tool or an AI agent? Plug in the data that tells a good building from a bad one.
Get API access320 buildings with confirmed harassment findings
HPD investigates landlords who illegally force tenants out — through threats, service shutoffs, or making apartments unlivable. When they confirm harassment after trial or inquest, it goes on the public record with dates and penalty amounts. We index those public HPD records — inclusion reflects a government finding, not a separate OpenStoop judgment.
Explore by Neighborhood
Browse building grades across NYC
East Village
Manhattan · 10003
Upper East Side
Manhattan · 10021
Upper West Side
Manhattan · 10024
Chelsea
Manhattan · 10001
West Village
Manhattan · 10014
Harlem
Manhattan · 10027
Lower East Side
Manhattan · 10002
SoHo
Manhattan · 10012
Williamsburg
Brooklyn · 11211
Park Slope
Brooklyn · 11215
Brooklyn Heights
Brooklyn · 11201
Bed-Stuy
Brooklyn · 11216
Astoria
Queens · 11103
Long Island City
Queens · 11101
South Bronx
Bronx · 10451
Riverdale
Bronx · 10471
Frequently asked questions
- Is OpenStoop free?
- Yes. OpenStoop is free to use. Search any NYC address and get an instant building grade.
- How are building grades calculated?
- We analyze 26 public data sources including DOB violations, HPD complaints, tax liens, litigation, facade inspections, and more. Each building is scored against similar buildings by size and age, and assigned a grade from A (best) to F (worst).
- What buildings does OpenStoop cover?
- We track 858,000+ buildings across all five NYC boroughs and grade every multifamily building we have the data for — about 445,000 of them.
- How often is the data updated?
- Our data is refreshed daily from 26 official city sources including the Department of Buildings, HPD, ECB, FDNY, and more.
- What are tenant harassment findings?
- HPD investigates tenant harassment cases through the Office of the Tenant Advocate. When they find confirmed harassment — after trial or inquest — the finding is recorded with the respondent name, date, and penalty amount. OpenStoop tracks all 320 NYC buildings with confirmed findings.
Stay in the loop
We're adding new data sources and features regularly. Be the first to know.