New York City runs one of the largest municipal open data programs in the world. This guide maps what "NYC open data" is, the datasets that matter most, how to access them, who relies on them — and, honestly, where ALKARTIS does and doesn't operate today.
Open data is public information a government publishes proactively, in reusable formats, for anyone to access without a formal request. In New York, nearly all of it flows through NYC Open Data — the city's central portal, where agencies publish thousands of datasets on a single platform with downloads and APIs for each one.
What makes New York distinctive is that publishing isn't optional. The Open Data Law (Local Law 11 of 2012) requires city agencies to make their public data available through the portal, with a goal of getting all such data online by the end of 2018. That "open by default" mandate is why the catalog is so deep — from citywide payroll to every 311 call.
Thousands of datasets exist, but a handful carry most of the questions people actually ask:
One of the most-accessed open datasets anywhere — millions of resident-filed reports, a block-level signal of what's happening across the five boroughs.
The Department of City Planning's parcel-level land use and geographic data (PLUTO/MapPLUTO), plus DOF property assessments and ACRIS deeds and mortgages.
Department of Buildings job filings and permit issuance (including DOB NOW) — where construction and investment are moving, building by building.
Housing Preservation & Development maintenance-code violations and complaints, plus citywide eviction records — core datasets for tenant and housing research.
Salary and overtime for city employees by agency and title — the foundation for any question about how public money is spent.
Restaurant inspection results, NYPD complaint data, and hundreds of other agency datasets published under the same open-by-default policy.
The NYC Open Data portal offers three routes in. You can browse and download any dataset as a CSV, JSON, or GeoJSON file. You can query datasets programmatically — the portal exposes an API for each dataset, so developers and researchers can filter and pull specific records or geographies without downloading whole files. And for authoritative single-record lookups, agency systems like ACRIS (property records) or the DOB's building information system give you the official record for one address.
As anywhere, each route trades convenience for effort. Browsing is easy but returns a raw table with no context; the API is powerful but assumes you can write queries and reconcile fields across agencies that don't share a common key — a building's identity in a DOB dataset, an HPD dataset, and a DOF dataset is rarely the same field.
The hard part of open data isn't access — it's that a dataset is not an answer. A payroll file gives you a number, not whether it's unusual for the role. A permit gives you an address, not whether it's one of dozens on the same block this quarter. A violation record names a building, not whether the same owner has a pattern of them across a portfolio held under different LLCs.
Turning records into answers takes cross-referencing datasets that were never designed to be joined, establishing a baseline so a single number has context, and tracing every figure back to its source so it can be checked. That connective layer is what we call Information Intelligence — the engine behind every ALKARTIS product.
ALKARTIS is live in Philadelphia, not yet in New York. Our products are built specifically around Philadelphia's public records today; New York is on our aspirational roadmap rather than committed to a timeline. If your organization needs connected New York intelligence — landlord portfolios, payroll patterns, permit signals, block-level activity — our enterprise and custom analysis engagements are how a new city comes online. Tell us what you need and we'll scope it.
New York City's official open data portal, where city agencies publish thousands of public datasets — 311 requests, building permits, property records, payroll, housing violations, and more — free for anyone to access and reuse.
Yes — free to browse, download, and use, with an API for most datasets. The challenge isn't access; it's cleaning, cross-referencing, and interpreting raw exports across agencies that don't share common identifiers.
Local Law 11 of 2012 — the Open Data Law — required city agencies to publish their public data through a single portal, with a goal of publishing all such data by the end of 2018.
Not yet. ALKARTIS products are built around Philadelphia's public records today, and New York is on our aspirational roadmap rather than committed to a timeline. For organizations that need connected New York intelligence, our enterprise and custom analysis engagements are how a new city comes online — you can request New York directly.