Collin County, TX Environmental Rules: Erosion Control (2026)
Key Facts
- Fall Required
- 6 in / 10 ft
- Permit Threshold
- 50 CY or 5,000 sq ft
- Roof Drain
- 5 ft from foundation
- Soil
- Blackland clay, expansive
- Slab
- Post-tension standard
Summary
Grading and drainage work over 1 acre requires a Collin County or city engineering permit plus TCEQ CGP. Sites must drain positively away from foundations with 6-inch fall in first 10 feet.
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 or more than 35 feet;(4) adopt, based on the amoun
Full Breakdown
Collin County Engineering reviews grading plans for unincorporated subdivisions, requiring positive drainage away from structures, detention for increased runoff, and no net redirection onto adjacent properties. Cities require grading permits for any fill or cut over 50 cubic yards or disturbance over 5,000 sq ft. IRC R401.3 requires 6-inch fall in first 10 feet from foundation. Blackland clay expansion causes foundation issues; post-tension slab construction is standard. Roof drains must discharge at least 5 feet from foundation per IRC.
Violations & Fines
Unpermitted grading: $500-2,000 city fine plus restoration. Drainage onto neighbor: civil nuisance claim under TX common law (Gehr doctrine). Foundation drainage failure: homeowner structural repair.
Frequently Asked Questions
Can I regrade my yard to push water toward my neighbor?
Sources & Official References
- [1]IRC R401
Other rules in Collin County
Texas rules heatmap·Compare Collin County to another location·View the Texas environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.