Is My House in a Flood Zone? Look Up Any US Address

Last updated 2026-10-21 · MapElevation

Check a US address on the flood map

A flood zone by address lookup begins by matching the address to a map position. Enter a complete street address, then inspect the pin before reading the result. A matching service may place the point along an address range rather than on the building itself. That distinction matters when a structure is close to a flood-zone boundary or when a large parcel spans several mapped areas.

This page queries the selected point against FEMA’s National Flood Hazard Layer. You can also enter known coordinates or choose the map directly, which avoids address matching. Use the address elevation finder when you want to understand the terrain estimate separately. A terrain reading and a flood-map designation answer different questions and should not be substituted for one another.

How to use this page

1. Identify the intended US building or land position.
2. Run the point lookup and read the zone code and subtype together.
3. Inspect any published static BFE, units, and datum without filling missing values.
4. Verify the effective map and relevant changes through FEMA and the community.

How the FEMA lookup works

The tool sends a point-intersection query to the public FEMA flood hazard zone layer and reads the fields returned for that point. It displays the code, subtype when supplied, Special Flood Hazard Area flag, and any usable static BFE with its units and datum. The FEMA NFHL service documentation identifies the fields available in that layer.

The result includes the retrieval date, which is not the same as the map’s effective date. A fresh query can still return a feature based on an older effective study. The authoritative context may include the effective FIRM, Flood Insurance Study, and subsequent map-change documents. Open the FEMA Map Service Center to review that material rather than treating a retrieval timestamp as proof of a new study.

Read the zone code and map information

Start with the code and subtype together. The flood zone codes guide provides the main comparison, while the Flood Zone X meaning and Flood Zone AE meaning pages explain common results in more depth. Subtypes can distinguish areas that would otherwise share a short label, particularly shaded and unshaded Zone X.

A base flood elevation by address result is useful only with its units, reference, and study context. Missing BFE data remains missing; it is not converted to zero. The current global surface elevation is displayed separately and is not used to calculate a building’s clearance above the flood elevation.

Understand missing data and boundary uncertainty

A service timeout, a failed address match, and a valid response with no intersecting feature have different meanings. The interface identifies these states and offers a retry for service failures. None is presented as a finding that a house is safe. If the pin appears outside the area you intended, correct the location before retrying the flood query.

A point can miss a narrow mapped area or describe land next to the building. For a boundary dispute, use official mapping and a qualified location assessment. The LOMA flood guide describes a separate process for requests involving a mapped designation; it does not turn a consumer map click into an amendment.

What to check next

If the question concerns building-specific elevations, read the elevation certificate guide and ask your local floodplain manager which records already exist. If you need a lender’s determination or an insurance decision, use the relevant professional process. FEMA’s flood map guidance explains how mapping fits into broader floodplain information.

A verified worked example needs both a saved service response and a check against the effective official map. Until that comparison is recorded, this page does not claim a particular example property’s zone. Review the elevation data accuracy guide for the limitations of the terrain context shown alongside the FEMA result.