How we built it

HVAC permit filings are up 34% since 2020. Four manufacturers control 28% of commercial volume. Heat pump permits have grown 8× in three years. A data-driven look at how the mechanical market is restructuring ahead of LL97 compliance deadlines.

The 30% trigger means the negotiated rate becomes the public rate even when it's paid to fewer than a third of the trade's workers. Here's what a measurement reform would look like — and why the map it requires already exists.

I spent twenty years as a union contractor measuring something almost no one else could — how much of this city the unions still actually build. The answer is smaller than nearly anyone believes.

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.

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.

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.

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.