Standard coverage · Detroit
Detroit, MI permit history & home risk data
Detroit is covered by a live query against the city's public BSEED building permits dataset, matched by address as you search.
Year built is optional, but it's what unlocks the code-era risk exam for Detroit addresses.
What Tarn covers in Detroit
Source: City of Detroit BSEED (Buildings, Safety, Engineering & Environmental Dept) building permits (ArcGIS open data), queried live
| System | Records since |
|---|---|
| Building permits (BSEED) | confirmed live, ongoing |
- Pulled live from Detroit'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.
- Permit status is not tracked in this dataset and will not appear; permit date, permit number, permit type, and description are all reliably populated.
- Data may have limited coverage for older permits, per the city's own data notice.
Detroit frequently asked questions
How deep is Detroit, MI permit data on Tarn?
Detroit is covered by a live query against the city's public BSEED building permits dataset, matched by address as you search.
Where does Tarn's Detroit permit data come from?
Tarn's Detroit permit data comes from City of Detroit BSEED (Buildings, Safety, Engineering & Environmental Dept) building permits (ArcGIS open data), queried live.
How far back does Tarn's Detroit coverage go?
Coverage varies by system in Detroit: Building permits (BSEED) (confirmed live, ongoing).
Does Tarn check code-era risks like lead paint or old wiring in Detroit?
Yes. When you search a Detroit 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 Detroit?
Yes — Tarn is free while we're building it. In exchange, we ask what wasn't useful.
Look up a specific Detroit address
Free while we're building. Tell us what's missing and you keep full access.