Research & Methodology

How we built it

Deep dives into the data, models, and engineering behind NYC's most comprehensive construction intelligence platform.

All Articles

Due Diligence
What's Actually on a Building's Record — Before You Close
A complete NYC property due diligence pull covers 12 city agencies: DOB permits, ECB violations, HPD complaints, FDNY records, ACRIS ownership, Loft Board status, and LL11/LL97 exposure. What a full building record reveals — and what a title search misses.
ECB. DOB. HPD. FDNY. Four Agencies. One Building. Completely Separate Records.
NYC building violations come from multiple agencies and are enforced independently through OATH hearings. What each type means, how defaults work, what they cost a property owner — and why "resolved" and "dismissed" are not the same thing.
Methods
NYC's Subsurface Modeled at City Scale
Kriging-interpolated bedrock depth, groundwater elevation, and fill extent predictions at any NYC coordinate — with P10/P90 confidence bounds — built from 112,000+ boring observations. What you can know before you commission your own investigation.
Data
How to Search NYC Contractor Permit History, Violations, and Licenses
Search NYC building violations, open permits, contractor licenses, and renovation history from live NYC Department of Buildings data. How permit abandonment rates, stop-work order history, and co-occurrence networks reveal contractor risk before you hire.

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