Orangeburg County, SC Building Setbacks & Zoning: Lot Coverage Limits (2026)

4 sets a 'Maximum Impervious Surface Ratio (% of lot)' for each of the county's eight zoning districts: 25 percent in RS, 45 percent in RG, 35 percent in RO, 45 percent in CN, 75 percent in CG, 75 percent in BI, 15 percent in FA and 25 percent in RC. The ratio caps the share of a lot that can be covered by roofs, driveways, parking areas and other surfaces that shed rather than absorb rainwater, and it sits in the same table as the district's minimum lot area, yard setbacks, height limit and density cap, so a site plan has to satisfy all of them together.

The FA district's 15 percent ceiling, the lowest in the table, reflects its larger minimum lot sizes and one-acre subdivision restriction under footnote (D); the CG and BI districts' shared 75 percent ceiling reflects their commercial and industrial intensity. A proposed development that would exceed the applicable ratio has to reduce paved or built area, add pervious surface, or seek relief through the variance process; the table itself provides no administrative exception.