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Flood zones & flood insurance

What is a Base Flood Elevation and how do I find it for my property?

Short answer

The Base Flood Elevation (BFE) is the height that floodwater is expected to reach in a flood with a 1% chance of being equaled or exceeded in any given year, and FEMA's Flood Insurance Rate Maps show it for zones such as AE and VE. Find it on the FEMA flood map for the address, on the property's elevation certificate if one exists, or by asking the local floodplain office.

What the BFE means

FEMA defines the Base Flood Elevation as the elevation of surface water resulting from a flood that has a 1% chance of equaling or exceeding that level in any given year. Flood Insurance Rate Maps (FIRMs) show BFEs in high-risk zones including AE, AH, V and VE; Zone X and many plain A zones do not show one.

What matters for a home is how its lowest floor compares with the BFE. Under the 8th Edition (2023) Florida Building Code, Residential, section R322.2.1, buildings in A zones must have the lowest floor at or above the BFE plus 1 foot, or the design flood elevation, whichever is higher. Older homes built before current maps may sit below today's BFE.[1][3]

How to find the BFE for an address

Three places usually answer it within minutes.

  • FEMA Flood Map Service Center: search the address, open the effective FIRM panel and read the BFE (the number in the wavy line or in parentheses after the zone, such as AE (EL 7)).
  • The elevation certificate: if one exists, it lists the flood zone, the BFE and the building's measured floor elevations. Ask the seller, or check the county or city flood portal.
  • Palm Beach County: the county's Flood Information page links a lookup for flood zones and available elevation certificates and lists a Flood Zone Hotline (561-233-5374); it notes that map information should be confirmed with an official determination by a Florida-licensed engineer, architect or surveyor.[2][4]

Why buyers should check it before closing

A home whose lowest floor is above the BFE is generally in a stronger position for flood insurance and for future renovations than one below it, and an elevation certificate is the document that shows the difference. Before the inspection period ends, compare the floor elevation on the certificate with the BFE on the current map and get a flood insurance quote.[1][4]

Key takeaways

  • The BFE is the expected floodwater height in a 1%-annual-chance flood.
  • FEMA flood maps show BFEs in zones such as AE, AH, V and VE, not in Zone X.
  • Florida's code requires new A-zone homes to have the lowest floor at least 1 foot above the BFE (as of 2026).
  • An elevation certificate compares the home's floor height with the BFE.
  • Check the BFE and get a flood quote during the inspection period.

Sources

  1. [1]FEMA — Glossary: Base Flood Elevation
  2. [2]FEMA Flood Map Service Center
  3. [3]Florida Division of Emergency Management — Floodplain guidance: slabs, floors and openings (FBC 8th Edition)
  4. [4]Palm Beach County Planning, Zoning & Building — Flood Information

Reviewed October 12, 2026. General real-estate information for Florida, not legal, tax, lending or insurance advice. Laws, rates and deadlines change — confirm property-specific facts with the agency cited, a Florida real-estate attorney, CPA or licensed insurance agent.

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Rules like these play out differently address by address. Tell us the property and what you are deciding. The Basaran Group · Anthony Basaran, P.A. · LoKation Real Estate.

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