How do I check flood risk for a specific address?
Start with the FEMA flood zone under the building, not just the address. Then check flood insurance claims nearby, how high the building sits compared to the base flood elevation where FEMA publishes one, and whether a levee protects the area. FEMA puts the odds for a building in a high-risk zone at about 1 in 4 of flooding at least once over a 30-year mortgage.
Four things to check
The zone: A and V zones are the 1% annual-chance area, shaded X the 0.2% area.
Claims history: FEMA publishes flood insurance claims by area. Claims outside the mapped zone tell you the map is missing something.
Height: where FEMA has a base flood elevation, compare it with the ground and the floor. A foot above or below changes the risk and the insurance price.
Levees: a building behind a levee can map as lower risk and still flood if the levee fails or is overtopped.
Why it matters to a buyer
A lender requires flood insurance on a building in a special flood hazard area under a federally backed loan. Premiums, lost rent and repairs all come off what the building is worth to you.
Check a property’s flood zone free
Type the address. See the FEMA flood zone and map, free. Add your email to see which buildings sit in the flood area.
Read next
- Free flood check by address
- What base flood elevation means
- Is my property in a flood zone?
- How much does a Phase I environmental site assessment cost?
- Do I need a Phase I environmental site assessment to buy a commercial property?
- What is a pre-Phase I environmental screen?
- How do I look up a property's FEMA flood zone?
Sources (checked 2026-11-10)