Allen, TX Environmental Rules: Erosion Control (2026)
Key Facts
- Permit Trigger
- 50 cubic yards
- Slope From House
- 5% for 10 feet
- Swale Min
- 2%
- Wall Permit
- Over 4 feet
Summary
Allen requires grading permits for any lot alteration moving over 50 cubic yards of soil. Positive drainage away from structures mandatory - minimum 5% slope for 10 feet. No redirecting water onto adjacent properties.
Sec. 232.003. SUBDIVISION REQUIREMENTS. By an order adopted and entered in the minutes of the commissioners court, and after a notice is published in a newspaper of general circulation in the county, the commissioners court may:(1) require a right-of-way on a street or road that functions as a main artery in a subdivision, of a width of not less than 50 feet or more than 100 feet;(2) require a right-of-way on any other street or road in a subdivision of not less than 40 feet or more than 70 feet;(3) require that the shoulder-to-shoulder width on collectors or main arteries within the right-of-way be not less than 32 feet or more than 56 feet, and that the shoulder-to-shoulder width on any other street or road be not less than 25 feet o
Full Breakdown
Allen Engineering Design Manual sets grading standards: 2% minimum swale slope, 5% away from foundations, 1% minimum paved drainage. Grading plans needed with building permits. Lot-to-lot drainage must match pre-development patterns. Retaining walls over 4 feet need engineered design and permit. Contact Allen at (214) 509-4100 for enforcement.
Violations & Fines
Unpermitted grading: 500-2,000 dollars, restoration required. Redirecting drainage: civil liability for downstream damages.
Frequently Asked Questions
Can I regrade my yard without a permit in Allen?
Sources & Official References
Other rules in Allen
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Erosion Control in Nearby Cities
How other cities in Collin County handle erosion control.