Flood Zones: Dallas vs Grand Prairie
How do flood zones rules compare between Dallas, TX and Grand Prairie, TX?
Dallas and Grand Prairie have similar restriction levels.
Dallas, TX
Dallas County
Dallas Development Code Chapter 51A, Article V (Floodplain and Escarpment Zone Regulations) regulates development in the 1% annual chance (100-year) floodplain. All residential and commercial development in the regulatory floodplain is reviewed by the city before permits are issued. Property owners may need fill permits and floodplain alteration permits before construction. The ordinance meets or exceeds FEMA NFIP minimum criteria under 44 CFR Part 60.3(d). Dallas participates in the Community Rating System for flood insurance discounts.
View full Dallas rules →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 →Key Facts Comparison
| Fact | Dallas | Grand Prairie |
|---|---|---|
| Code Section | Ch. 51A, Art. V (Floodplain Regulations) | - |
| Standard | 1% annual chance (100-year) floodplain | - |
| FEMA Compliance | Meets 44 CFR Part 60.3(d) | - |
| Permits | Fill permit and floodplain alteration permit may be required | - |
| NFIP | Participates in Community Rating System | Active participant |
| Major Flood Areas | - | West Fork Trinity River, Johnson Creek |
| Elevation | - | 1 foot above base flood elevation |
| Permit | - | Floodplain development permit required |
| CRS | - | Participates for reduced insurance rates |
Highlighted rows indicate differences between cities.
Dallas FAQ
Can I build in a Dallas floodplain?
Development in the regulatory floodplain requires city review and may need fill permits and floodplain alteration permits under Article V. All construction must meet or exceed FEMA NFIP criteria.
How do I check if my property is in a flood zone?
Contact Dallas Water Utilities Stormwater Operations or check FEMA flood maps. The city reviews all development in the 1% annual chance floodplain before issuing permits.
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.
Compare other topics
See how Dallas and Grand Prairie compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool