Flood Zones: Grand Prairie vs Irving
How do flood zones rules compare between Grand Prairie, TX and Irving, TX?
Grand Prairie and Irving have similar restriction levels.
Grand Prairie, TX
Dallas County
Grand Prairie has significant flood zones along the West Fork of the Trinity River, Johnson Creek, and other tributaries. The city participates in FEMA's NFIP and enforces strict floodplain development regulations. New construction must be elevated above the base flood elevation.
View full Grand Prairie rules →Irving, TX
Dallas County
Irving regulates floodplain development under the Land Development Code and participates in the National Flood Insurance Program (NFIP). The city enforces FEMA flood zone designations along the Elm Fork of the Trinity River, Cottonwood Creek, and other drainage corridors. Construction in Special Flood Hazard Areas requires a floodplain development permit, and residential structures must be elevated at least one foot above the base flood elevation.
View full Irving rules →Key Facts Comparison
| Fact | Grand Prairie | Irving |
|---|---|---|
| NFIP | Active participant | - |
| Major Flood Areas | West Fork Trinity River, Johnson Creek | Elm Fork Trinity River, Cottonwood Creek |
| Elevation | 1 foot above base flood elevation | - |
| Permit | Floodplain development permit required | - |
| CRS | Participates for reduced insurance rates | - |
| NFIP Status | - | Active participant |
| Elevation Req | - | 1 ft above base flood elevation for residential |
| Permit Required | - | Floodplain development permit for SFHA |
| CRS Rating | - | Community Rating System participant |
Highlighted rows indicate differences between cities.
Grand Prairie FAQ
Is my property in a Grand Prairie flood zone?
Check the FEMA Flood Map Service Center or contact Grand Prairie Engineering. Major flood zones follow the West Fork Trinity River and Johnson Creek corridors.
Can I build in a Grand Prairie flood zone?
Building is allowed with a floodplain development permit, but structures must be elevated at least one foot above the base flood elevation and meet strict construction standards.
Irving FAQ
Is my Irving property in a flood zone?
Check FEMA's Flood Map Service Center or contact Irving's Development Services. Properties near the Elm Fork of the Trinity River, Cottonwood Creek, and major drainage channels are most likely in Special Flood Hazard Areas.
Can I build in a flood zone in Irving?
Yes, with a floodplain development permit. Residential structures must be elevated at least one foot above the base flood elevation. Commercial structures may use floodproofing as an alternative to elevation.
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