Real Estate Agents & Buyers
Check flood risk for any ZIP before making an offer. Flag properties likely to require expensive flood insurance and alert buyers to properties in FEMA high-risk zones.
Official FEMA flood zone classifications and high-risk flags for every US ZIP code. Part of the EnrichZip dataset — all 33,000+ US ZIP codes, instant download.
How to use this data
Real Estate Agents & Buyers
Check flood risk for any ZIP before making an offer. Flag properties likely to require expensive flood insurance and alert buyers to properties in FEMA high-risk zones.
Property Investors
Screen investment portfolios and target markets for flood exposure. High-risk ZIPs face rising insurance costs, lender restrictions, and long-term climate risk to values.
Insurance Professionals
Underwrite flood risk at the ZIP code level. Identify markets where flood insurance penetration is low relative to flood risk exposure.
Mortgage Lenders
Identify ZIPs requiring mandatory flood insurance on federally-backed loans. A high-risk flag triggers NFIP or private flood insurance requirements.
Columns Included
Source: Federal Emergency Management Agency (FEMA). All columns are pre-joined and ready to use — no API key or GIS software required.
| Column Name | Description |
|---|---|
fema_total_features |
Number of flood zone features intersecting the ZIP area |
fema_pct_high_risk |
% of area in high-risk flood zones (A, AE, V, VE, AO, AH, AR) |
fema_high_risk_flag |
1 if ZIP has significant high-risk flood exposure, 0 otherwise |
About This Data
Flood risk is one of the most financially consequential data points for real estate. Properties in FEMA Special Flood Hazard Areas face mandatory flood insurance requirements on federally-backed mortgages, often costing $1,000-$5,000+ per year. Climate change is expanding flood risk into areas previously considered safe, making FEMA flood zone awareness increasingly important for real estate, insurance, and lending decisions.
The FEMA National Flood Hazard Layer (NFHL) is the official source of flood zone data in the United States. It covers over 22,000 communities with detailed flood zone maps. But the NFHL is a GIS dataset — using it requires specialized software and data skills. EnrichZip translates it into a simple CSV flag at the ZIP code level.
For real estate market analysis, ZIP-level flood risk data is more useful than property-level data when you're screening dozens of markets rather than evaluating a single address. A ZIP where 40% of mapped features are in Zone AE presents very different investment risk than a ZIP where flood zones cover only 5% of the area.
Coastal and riverine ZIPs with high FEMA flood risk often face compounding headwinds: rising insurance costs, lender restrictions on loan origination, and long-term property value risk as climate risk is increasingly priced into real estate. Florida, Louisiana, Texas, and the Carolinas have particularly high concentrations of high-risk flood zone ZIPs.
FAQ
FEMA designates certain areas as Special Flood Hazard Areas (SFHAs) — zones with a 1% or greater annual chance of flooding (the '100-year flood'). Zone designations include A, AE, AO, AH, AR, and the coastal V and VE zones. Properties in SFHAs with federally-backed mortgages are required to carry flood insurance.
We flag a ZIP code as high-risk when more than 25% of its mapped flood features fall within FEMA's Special Flood Hazard Area designations. This is a summary indicator — for individual property decisions, always check the official FEMA Flood Map Service Center at msc.fema.gov.
FEMA continuously updates flood maps as new studies are completed and community maps are revised. Our dataset reflects the FEMA National Flood Hazard Layer as of our most recent data build. We rebuild annually.
No. EnrichZip's flood data is a ZIP-level summary for market analysis and screening. For a specific property transaction, you need a standard flood zone determination from a certified provider. Our data is for portfolio screening, market analysis, and research — not individual property determinations.