Flood · Glossary
Special Flood Hazard Area
Updated 2026-07-18
Special Flood Hazard Area is FEMA's mapped area with at least a 1% annual chance of flooding, commonly shown as A- or V-series zones. The SFHA designation drives minimum National Flood Insurance Program floodplain rules and can affect federally related mortgage insurance requirements.
What it means
The SFHA is the land covered by the base flood on an effective Flood Insurance Rate Map. It may include floodways and coastal high-hazard areas.
Why it matters for land decisions
SFHA status can materially affect feasibility, cost, design, insurance, and financing.
- Identify the exact zone.
- Check map amendments and local standards.
People also ask
Is the SFHA the same as the floodplain?
It is the federally mapped base-flood area; broader floodplains may include other probabilities, local studies, or unmapped areas.
Can an SFHA boundary change?
Yes. FEMA map revisions, Letters of Map Change, and new studies can alter effective mapping.
Official sources
Related terms
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