Grading & Drainage: Grand Prairie vs Irving
How do grading & drainage rules compare between Grand Prairie, TX and Irving, TX?
Irving has fewer restrictions than Grand Prairie.
Grand Prairie, TX
Dallas County
Grand Prairie requires Floodplain Development permits for work within 200 feet of the floodplain. All development must comply with the City Drainage Design Manual. Engineering staff review drainage plans for every building permit.
View full Grand Prairie rules →Irving, TX
Dallas County
Irving requires grading permits for land disturbance activities under the Land Development Code. All development must manage drainage to prevent adverse impacts on adjacent properties. Post-development stormwater runoff must be detained to match or reduce pre-development flow rates. Irving's relatively flat North Texas terrain requires engineered drainage solutions for larger developments.
View full Irving rules →Key Facts Comparison
| Fact | Grand Prairie | Irving |
|---|---|---|
| Floodplain Permit | Within 200 ft of floodplain | - |
| FEMA | Approval may be required | - |
| Drainage Review | Every building permit | - |
| Master Plans | City-wide drainage plans | - |
| Permit Required | - | Grading permit for land disturbance |
| Drainage Standard | - | Detain post-development runoff to pre-development rates |
| Design Storm | - | 100-year storm event for major drainage |
| Review Authority | - | Irving Engineering Division |
| Adjacent Impact | - | Must not increase drainage onto neighbors |
Highlighted rows indicate differences between cities.
Grand Prairie FAQ
Do I need a permit for work near the floodplain?
Yes. A Floodplain Development permit is required for any work within 200 feet of the floodplain. FEMA approval may also be needed.
How does drainage review work?
Engineering staff review drainage plans for every building permit to ensure compliance with the City Drainage Design Manual.
Irving FAQ
When do I need a grading permit in Irving?
A grading permit is generally required for any significant land disturbance, including site preparation for new construction, lot regrading, and drainage modifications. Contact Irving Development Services for specific thresholds.
What are Irving's drainage detention requirements?
Development must detain stormwater so that post-development runoff does not exceed pre-development rates. Detention facilities are designed based on the 100-year storm event. Engineering plans must be submitted with development applications.
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