Rock Hill, SC Building Setbacks & Zoning: Lot Coverage Limits (2026)

Chapter 31 (Zoning) of the Rock Hill Code, as comprehensively amended through Ordinance No. 2025-07 and prior amendments, sets maximum building coverage and, in some districts, impervious coverage as part of the bulk standards. Lower-density single-family districts have stricter limits (typically 30 to 40 percent building coverage) while higher-density multifamily, mixed-use, commercial and industrial districts allow more (often 50 to 80 percent). Specific percentages for each district are listed in the Chapter 31 bulk tables and should be confirmed with the Planning Department. Stormwater controls for earth-disturbance projects are reviewed under the City's stormwater management ordinance and the South Carolina DHEC NPDES Phase II MS4 requirements at SC Regulation 61-9.450. Projects disturbing one acre or more require a separate SC DHEC NPDES Construction General Permit (SCR100000) and an associated SWPPP. Lot-coverage compliance is verified at building-permit application via site plan and again at field inspection by the Rock Hill Building Department. Properties in Old Town Rock Hill historic areas may have additional design standards.