McKinney requires a grading and drainage permit for earthwork exceeding 50 cubic yards or any grading within a floodplain. Site grading must direct runoff to approved drainage systems without increasing discharge to adjacent properties.
Engineering Services reviews grading plans per the McKinney Engineering Design Manual. Lot-to-lot drainage changes are prohibited without engineered solution. Detention may be required for developments over certain thresholds to maintain pre-development peak flows. Lot drainage in new subdivisions must follow the approved final plat drainage plan.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Collin County.
See how other cities in Collin County handle grading & drainage.
See how McKinney's grading & drainage rules stack up against other locations.
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