What is a VE flood zone?

What does the VE zone mean?

The “V” stands for velocity — moving water and breaking waves, not just standing flood. A VE zone is a Special Flood Hazard Area (the area inundated by the base flood, which has a 1-percent chance of being equaled or exceeded in any given year) with the added force of wave action that can structurally damage a building. The trailing E means an Base Flood Elevation has been determined and is printed on the Flood Insurance Rate Map. A plain V zone is the same hazard with no BFE shown.

How is a VE zone mapped?

FEMA maps VE where a detailed coastal engineering study finds that base-flood waves reach about 3 feet or more. Just landward, a transitional band of roughly 1.5–3-foot waves is the Coastal A Zone, shown by the Limit of Moderate Wave Action (LiMWA) line; calmer water beyond it is mapped as an AE or A zone. The 3-foot breaking-wave height is the dividing line because that is the point at which wave force begins to destroy ordinary wall-and-slab construction.

How are buildings constructed in a VE zone?

Because waves must pass under the structure, NFIP and local floodplain rules for VE are the strictest of any zone. Typical requirements include:

• Elevation on open pilings or columns — never on solid perimeter walls or fill used for support.
• The bottom of the lowest horizontal structural member elevated to or above the Base Flood Elevation (not just the floor surface, as in AE).
• Breakaway walls or open lattice below the elevated floor, so a wave can collapse them without taking the house.
• The space below used only for parking, access, or storage — not living area.

These standards also drive higher flood-insurance premiums in VE than in AE for an otherwise similar home.

VE vs AE — the short version

Full side-by-side: AE vs VE flood zone.

SFHA, BFE, and zone designations: FEMA, Flood Zones glossary (updated Jul 8, 2020) and Base Flood Elevation (updated Mar 5, 2020). Coastal High Hazard Area / wave-action and the ~3-ft and LiMWA thresholds reflect FEMA coastal flood-study methodology as reproduced by NFIP communities (Chenango County, NY; Town of Nags Head, NC) and NOAA/Sea Grant coastal-zone guidance.

Is my property in a VE zone?

Look up the effective FEMA map for your address — see how to read a FEMA flood map. Remember that a VE designation describes flood risk; it says nothing about how fast the beach or bluff in front of you is retreating. For the long-term erosion record, see the New York South Shore or the California coast, and live storm-surge watch for an active event.