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Allen, TX Environmental Rules: Erosion Control (2026)

Light Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified April 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

Source: Allen Engineering Design ManualView official code

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?
Small landscaping changes under 50 cubic yards are generally fine, but you cannot change drainage patterns affecting neighbors.

Sources & Official References

Other rules in Allen

All Allen rules

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