Base Flood Elevation (BFE) Lookup by Address

Last updated 2026-10-21 · MapElevation

Find available BFE information by address

Base flood elevation by address is a different task from finding the height of a house address on a terrain map. Search a US address, inspect the pin, and examine what FEMA actually supplies at that location. If the point is wrong, correct it before interpreting a water elevation. You can enter coordinates directly when you have a known study location or a professionally identified point.

The lookup reads the static BFE field in the NFHL flood hazard zone feature when that field contains a usable value. It preserves the source unit and vertical datum instead of relabelling the result as a generic height above sea level. The FEMA layer documentation describes these attributes. The flood zone by address page explains the broader point-query workflow.

How to use this page

1. Search a supported address or enter a known coordinate.
2. Read the static BFE only when a usable value is returned.
3. Keep its units, datum, and map identifier with the number.
4. Consult the effective FIRM/FIS when the field is missing or a precise study interpretation is needed.

How to read a Base Flood Elevation

FEMA defines Base Flood Elevation as the water-surface elevation associated with the base flood. The base flood has a 1-percent annual chance of being equalled or exceeded. This is a study concept, not a prediction that flooding happens on a fixed calendar schedule. Read the effective map and study for the spatial context of a particular value.

A BFE is not a depth above the local ground. It needs a vertical reference, and the terrain or building measurement used for comparison must refer to an appropriate compatible system. The Flood Zone AE meaning guide explains why BFEs commonly appear with detailed-study areas, while the flood zone codes guide distinguishes other zone types.

Why BFE may be missing

A missing static field does not mean the flood elevation is zero or that a place is outside a mapped hazard. The relevant information may need to be read from the effective FIRM, study profiles, or other supporting material. Some studies and zone categories have different forms of elevation information. Placeholder values in an API are not physical elevations and are excluded from the displayed result.

Use the FEMA Map Service Center to locate the official documents and ask the community floodplain manager which study information applies. If FEMA is temporarily unavailable, retry later or use the official portal. A service failure remains an unavailable result, even if the separate terrain card loaded successfully.

NAVD88, NGVD29, and other vertical references

Vertical datum names identify how heights are referenced. A number in NGVD29 and a number in NAVD88 should not be treated as interchangeable simply because both are written in feet. GLO-30 introduces another source reference. The height above sea level guide explains why an ordinary sea-level label leaves out information needed for a valid comparison.

NOAA VDatum documents supported transformations and their geographic context. This application currently preserves reference labels and does not apply an unverified offset. A professional comparison needs to establish the correct measurement, reference, units, location, and transformation method before calculating any difference.

When ground elevation and BFE can be compared

Start by identifying the question: a floor elevation, lowest adjacent grade, or lot elevation is not necessarily the same physical quantity. The elevation certificate guide describes building-specific records, while the LOMA flood guide discusses the inputs relevant to map amendment requests. An address elevation finder provides useful context but does not supply certified measurements.

A worked comparison is awaiting a verified source pair and documented datum treatment. No numerical clearance or transformation has been invented for an example. Read the elevation data accuracy guide before comparing the surface estimate with a FEMA value, and retain the original study references when asking a professional to interpret the result.