How it works
How PreOfferCheck builds a public-data property risk brief
1. Address geocoding
Your address is matched to coordinates and census geography (state, county, tract, block) using the U.S. Census Bureau Geocoder. This ensures we pull data for the correct location.
2. Data sources (queried in parallel)
- FEMA NFHL — Flood zone classification, whether flood insurance may be required
- U.S. Census ACS — Median home value, household income, population
- EPA Envirofacts — Superfund and Toxic Release Inventory facility records
- USGS — Elevation data
- Google Places / OSM — Nearby hospitals, schools, grocery stores, fire & police
- OpenFEMA — Disaster declarations, NFIP flood claims by ZIP
3. Public-data signals
We summarize flood zone, FEMA disaster history, EPA facility records, nearby access, census context, and a directional insurance estimate. The insurance estimate is derived from state averages and public risk factors — it is not a quote. Always get real quotes from carriers.
4. Report summary
The public beta creates a concise report summary by default so the key findings are easy to review and compare across properties.
All data is publicly available. We do not guarantee accuracy or completeness. Use this report as a starting point; verify with licensed professionals.