Platform · Glossary
FEMA flood zone.
A geographic classification published by FEMA indicating the level of flood risk for a specific area. The zones are codified on Flood Insurance Rate Maps (FIRMs) and used by lenders, insurers, and the federal flood-insurance program.
The zones that matter most for investors
- A zones (A, AE, AH, AO, AR, A99) — Special Flood Hazard Areas with a 1% annual chance of flooding. Federally backed mortgages require flood insurance for properties here.
- V zones (V, VE, VO) — Coastal high-hazard areas subject to wave action and storm surge. Same insurance requirements as A zones, but premiums are typically higher.
- X zones (X, B, C) — Areas of minimal or moderate flood risk. Flood insurance is not required but is often still available.
- D zones — Areas where flood hazard has not yet been studied.
For official zone definitions, see FEMA’s Flood Zones glossary and FloodSmart’s What is my flood zone? guide.
How 3Y surfaces flood risk in a report
When a property’s tract intersects an SFHA, 3Y renders a Flood risk callout at the top of the report. The exact copy depends on the combination of flood zone and whether the county is also in hurricane wind-pool territory:
- V Zone (high severity): “High-risk flood area (V Zone). Flood insurance is typically required for financed properties, and wind coverage is strongly recommended due to potential wave and storm-surge exposure.”
- A Zone with wind exposure: “Flood-prone area (A Zone) with hurricane wind exposure. Flood insurance is typically required for financed properties, and a separate wind policy is strongly recommended.”
- A Zone alone: “Flood-prone area (A Zone). Flood insurance is typically required for most financed properties.”
- Wind-pool county, no SFHA: “Property is in a hurricane wind territory. Standard homeowners insurance often excludes wind and hail coverage in this area; a separate wind policy is typically required by lenders.”
Each callout links out to FEMA’s flood-map portal so the user can verify against the official source.
What this means for the underwriting math
A property in an A or V zone often needs flood insurance for financed purchases. 3Y provides a default flood-insurance rate when the property’s tract sits in an SFHA. This is not a quote; it is a planning input that helps bring a major cost center into the analysis instead of leaving it out.