FEMA designates two very different risk levels under the "Zone X" label. On a FEMA lookup, both show up as simply "X" unless you look at the zone subtype. This causes real confusion — a property in the 500-year floodplain and a property on a hilltop miles from any water both get labeled "Zone X."
X (Shaded) Moderate Risk
Properties here are close enough to high-risk areas that FEMA mapped them deliberately. The boundary between AE and X Shaded is often a matter of feet of elevation.
X (Unshaded) Low Risk
This doesn't mean zero risk — flash floods, drainage issues, and unprecedented rainfall can affect any property. But FEMA has determined this area is outside the major statistical flood boundaries.
Our flood zone lookup clearly labels results as "X (Shaded)" or "X (Unshaded)" based on the FEMA zone subtype data. If you see:
FEMA's own tools sometimes just show "X" without the distinction. The subtype field (ZONE_SUBTY) in the raw data contains the answer — if it says "0.2 PCT ANNUAL CHANCE FLOOD HAZARD" or "500," it's shaded.
Neither zone requires flood insurance for federal mortgages. But the calculus is different:
X (Shaded): Strongly consider a Preferred Risk Policy. At $300–500/year, it's inexpensive protection for a zone where FEMA has identified real (if moderate) flood risk. Over 25%% of all NFIP claims come from X zones.
X (Unshaded): Insurance is available but the cost-benefit is harder to justify unless you have specific local risk factors (poor drainage, proximity to development, etc.).
For more: What is a 500-year floodplain? and Flood insurance costs.
Free instant lookup using official FEMA data