South Carolina has no statewide grading permit. In Dorchester County, earthwork disturbing one acre or more needs state stormwater coverage, while smaller grading is governed by county drainage review and the rule against pushing runoff onto neighbors.
Grading and drainage in Dorchester County run through two channels rather than a single grading permit. Any earthwork disturbing one acre or more, or part of a larger common plan, must obtain state stormwater permit coverage and control runoff under the Sediment Reduction Act. Smaller sites need no state permit, but the county's stormwater and land-development review still requires new lots to drain without concentrating runoff onto adjoining property. South Carolina follows the reasonable-use rule for surface water, so an owner who regrades and channels stormwater onto a neighbor's land is liable for the resulting damage.
Grading a one-acre site without state permit coverage draws SCDES penalties and stop-work orders. Diverting concentrated stormwater onto a neighbor creates civil liability for drainage damage regardless of acreage.
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Dorchester County, SC
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See how Dorchester County's grading & drainage rules stack up against other locations.
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