New York City has 70,000 residential buildings. We've indexed every one of them.
Every complaint filed. Every violation recorded. Every building that's been flagged, inspected, or ignored. The Flag Check brings it all into one place — searchable, transparent, and free for any tenant who needs it.
Holding your landlord accountable shouldn't require a law degree. This isn't a rating site. It's a record and a place to resolve it.
Why we built this
When something goes wrong in your apartment — heat in January, an elevator that hasn't worked in months, a security deposit that was never returned — you deserve a response. The city can help with some of it. But government data only captures what gets formally reported. It doesn't cover the landlord who advertised a renovated kitchen that doesn't exist, ignored three months of emails, or quietly pocketed your deposit and moved on.
And if you're searching for an apartment, you deserve to know what you're walking into. Whether your next landlord has done this before. Whether the building you're about to sign a lease on has been flagged dozens of times — by the city, by tenants, or both.
The Flag Check was built by a New Yorker who moved into an apartment with inconsistent heat, a super who took months to "find" a microwave, and a landlord who'd been doing this since the 1980s. New Yorkers shouldn't have to figure this out alone. They need a way to share what they know, warn each other about bad actors, and hold landlords accountable in plain sight.
How it works
A tenant files a complaint. Their landlord is notified. The response — or the silence — becomes part of the public record. The next person searching that building sees all of it before they sign.
Complaints go on the books permanently. We track whether landlords respond, how quickly, and how well. The more tenants file complaints, the more pressure landlords have to join and respond. That accountability is visible to everyone — including the landlord who actually wants to do better.
Our commitment
Landlord subscriptions fund this site. They don't buy influence over what tenants see — and they never will. The record is the record. A paying account doesn't change it.
Good landlords get credit here too. If your building has a clean record and a landlord who responds, that shows up just as clearly as the bad ones.
Where we're going
Every city in this country has the same problem. Tenants making life-changing decisions without the information they need. Landlords with no easy way to know how their buildings are really doing. A gap where accountability should be.
We're closing that gap — starting with New York.
The more tenants share their experiences here, the more powerful this becomes for everyone. For the tenant who comes next. For the landlord who actually cares. For a city that deserves better.
Built for New York. Built for what comes next.