Zone X is the flood zone everyone hopes to see on a lot report. It is the lowest-risk label on FEMA's maps, but it does not mean the lot is dry. Here is what X says, what it leaves out, and how often it shows up across the Florida lot markets we measure.
Check any lot's flood zone in secondsFlood zone, wetlands, soil and owner, in one search.See how it worksFlood zone X meaning, in short: Zone X is outside FEMA's special flood hazard area, the high-risk zone. Shaded X is moderate risk, the land between the 100-year and 500-year floodplains. Unshaded X is minimal risk, above the 500-year flood level. Neither carries the federal flood insurance requirement that comes with a mortgage in Zones A and V.
According to FEMA, moderate flood hazard areas are "the areas between the limits of the base flood and the 0.2-percent-annual-chance (or 500-year) flood", and minimal hazard areas are those "outside the SFHA and higher than the elevation of the 0.2-percent-annual-chance flood". The base flood is the 1% annual chance flood, the one people call the 100-year flood.
| Label | On older maps | What FEMA means |
|---|---|---|
| X (shaded) | Zone B | Moderate risk: between the 100-year and 500-year floodplains |
| X (unshaded) | Zone C | Minimal risk: above the 500-year flood level |
If an old survey or listing says Zone B or Zone C, that is the same idea in the old naming. Always check the current map: zones change when FEMA updates a county's maps.
Not by federal rule. The requirement applies in high-risk areas, the zones that start with A or V. As FloodSmart puts it, if you own property in a high-risk zone "and have a federally backed mortgage, you are required to purchase flood insurance as a condition of that loan." In Zone X a lender can still ask for it, and plenty of owners buy it anyway: FloodSmart says 1 in 3 flood insurance claims come from low- and moderate-risk zones.
The price is no longer set by the zone alone. Under FEMA's current pricing approach, known as Risk Rating 2.0, the flood zone and the building's elevation are "no longer the only factors" in setting a National Flood Insurance Program premium.
FEMA maps the risk of a flood event. It says nothing about how water behaves in the ground on an ordinary wet week. That is the job of the USDA soil survey, and the two can disagree.
Palm Bay is the clearest example we have measured: 63% of our sampled points were Zone X, yet 88% of our soil samples came back poorly drained. A Zone X lot on that soil can still sit under standing water after a storm, still need fill and still need a drainage plan before a builder will take it. See the Palm Bay breakdown.
So on a Zone X lot, check three more things before you buy:
It ranges from almost every point to under half. Share of our sampled points in Zone X:
| Market | Zone X |
|---|---|
| Marion Oaks | 100% |
| Rainbow Springs | 96% |
| Okeechobee | 93% |
| Indian Lake Estates | 92% |
| Spring Hill | 89% |
| Wedgefield | 89% |
| Palm Bay | 63% |
| Cape Coral | 51% |
| Daytona Park Estates | 50% |
| Poinciana | 48% |
| Port Charlotte | 46% |
Our numbers: for each market we sampled 121 evenly spaced points on 15 September 2026 against FEMA's National Flood Hazard Layer, the same layer the app reads. Where FEMA returned no zone for a point, the share is of the points it did answer for.
| Zone | Risk | Base flood elevation on the map | Flood insurance with a federally backed mortgage |
|---|---|---|---|
| X (unshaded) | Minimal | No | Not required, lender may still ask |
| X (shaded) | Moderate | No | Not required, lender may still ask |
| A | High (1% a year) | No | Required |
| AE | High (1% a year) | Yes | Required |
| VE | High, coastal, with waves | Yes | Required |
Read next: flood zone AE, the high-risk zone with a published flood elevation, and flood zone A, the high-risk zone without one.
FEMA's Flood Map Service Center shows the official map for any address, and it is the map lenders and insurers go by. Land in Seconds reads the same FEMA layer and puts the flood zone next to wetlands, soil drainage and the owner of record, so you see the whole lot in one search instead of four.
Sources: FEMA flood zones glossary, FEMA Zone AE, FEMA base flood elevation, FloodSmart: what is my flood zone, FloodSmart: what is my flood risk, FEMA Risk Rating 2.0, FloodSmart: elevation certificates, Florida Division of Emergency Management. Checked 26 October 2026. This is general information, not insurance or legal advice.
Zone X is FEMA's label for areas outside the high-risk flood zone. Shaded X is moderate risk, between the 100-year and 500-year floodplains. Unshaded X is minimal risk, above the 500-year flood level.
The federal requirement applies to high-risk zones that start with A or V, not to Zone X, though a lender can still ask for it. FloodSmart says 1 in 3 flood insurance claims come from low- and moderate-risk zones, so many owners carry it anyway.
Shaded X is moderate flood risk: the area between the 1% and 0.2% annual chance floodplains. Unshaded X is minimal risk: higher than the 0.2% annual chance flood.
On older FEMA maps, moderate-risk areas were labeled Zone B and minimal-risk areas Zone C. Newer maps label them shaded X and unshaded X.
Yes. The flood map describes the risk of a flood event, not how well the ground drains day to day. A Zone X lot on poorly drained soil can still hold water and need fill and a drainage plan.
Check a lot's flood zoneSee what it checks, then create an account. Seven days free, no card.