Flood · Glossary
Base Flood Elevation
Updated 2026-07-18
Base Flood Elevation is the computed water-surface elevation of the flood with a 1% chance of being equaled or exceeded in any year. It is a key reference for California floodplain permitting, building elevation, and flood-insurance documentation where mapped.
What it means
The BFE is tied to a stated vertical datum and may appear on FEMA profiles, map panels, or floodway data tables.
Why it matters for land decisions
Comparing site and floor elevations with the BFE helps determine design and compliance needs.
- Match vertical datums.
- Add locally required freeboard.
People also ask
Is BFE the required finished-floor elevation?
Not always. Local codes may require the floor above BFE by a freeboard amount.
Who verifies elevation relative to BFE?
A licensed surveyor or engineer commonly provides elevation documentation, subject to local requirements.
Official sources
Related terms
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