Standard coverage · San Francisco Bay Area
San Francisco, CA permit history & home risk data
San Francisco is covered by a live query against the city's public Building Permits dataset, matched by address as you search.
Year built is optional, but it's what unlocks the code-era risk exam for San Francisco addresses.
What Tarn covers in San Francisco
Source: SF Department of Building Inspection Building Permits (data.sfgov.org), queried live
| System | Records since |
|---|---|
| Building permits | varies by filing |
- Pulled live from San Francisco's public Socrata dataset on every search, not a static extract — coverage reflects whatever DBI has published as of your search.
- Matched by street name, then filtered to the requested house number, the same way the source data is structured.
San Francisco frequently asked questions
How deep is San Francisco, CA permit data on Tarn?
San Francisco is covered by a live query against the city's public Building Permits dataset, matched by address as you search.
Where does Tarn's San Francisco permit data come from?
Tarn's San Francisco permit data comes from SF Department of Building Inspection Building Permits (data.sfgov.org), queried live.
How far back does Tarn's San Francisco coverage go?
Coverage varies by system in San Francisco: Building permits (varies by filing).
Does Tarn check code-era risks like lead paint or old wiring in San Francisco?
Yes. When you search a San Francisco 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 San Francisco?
Yes — Tarn is free while we're building it. In exchange, we ask what wasn't useful.
Look up a specific San Francisco address
Free while we're building. Tell us what's missing and you keep full access.