Property intelligence from the ground up^SM

Building permit records are written in trade shorthand no standard decodes: T/O, E/C/O, SFD. What the codes mean, why records from 20,000 jurisdictions don’t line up, and what it takes to make them readable.

The US has roughly 20,000 building permit jurisdictions, each writing its own rules and keeping its own records. Here's who they are, where they are, and how to find the one that governs any address.

A building permit is more than paperwork: it's a structured record of what changed on a property, and when. Here's what's inside one and why it matters for risk.