Standard coverage · Denver
Denver, CO permit history & home risk data
Denver is covered by a live query against the city's public commercial construction permits dataset, matched by address as you search.
Year built is optional, but it's what unlocks the code-era risk exam for Denver addresses.
What Tarn covers in Denver
Source: City and County of Denver Commercial Construction Permits (ArcGIS open data), queried live
| System | Records since |
|---|---|
| Commercial construction permits | confirmed live, ongoing |
- Pulled live from Denver's own ArcGIS open data feed on every search, not a static extract — coverage reflects whatever the city has published as of your search.
- Matched by house number plus the first word of the street name; results may occasionally include unrelated records that happen to share both, and a street with a directional prefix (N/S/E/W) generally needs to be entered with the directional included to match.
- Only commercial construction permits are searched; a residential-only property may show zero results even if it has permit history in the city's separate residential dataset.
- Permit type and description are not published in a consistently labeled way in this dataset and typically appear blank; permit date and permit number are reliably populated.
Denver frequently asked questions
How deep is Denver, CO permit data on Tarn?
Denver is covered by a live query against the city's public commercial construction permits dataset, matched by address as you search.
Where does Tarn's Denver permit data come from?
Tarn's Denver permit data comes from City and County of Denver Commercial Construction Permits (ArcGIS open data), queried live.
How far back does Tarn's Denver coverage go?
Coverage varies by system in Denver: Commercial construction permits (confirmed live, ongoing).
Does Tarn check code-era risks like lead paint or old wiring in Denver?
Yes. When you search a Denver address and enter the year it was built, Tarn checks it against national code-era risk factors — lead paint, electrical panel age and wiring type, plumbing material, and more.
Is Tarn free to use in Denver?
Yes — Tarn is free while we're building it. In exchange, we ask what wasn't useful.
Look up a specific Denver address
Free while we're building. Tell us what's missing and you keep full access.