Buying Land in South Carolina: What Actually Governs a Parcel

County zoning in South Carolina is optional -- and a real number of counties have none

Unlike states where every county must zone, South Carolina counties are only authorized, not required, to adopt zoning under the South Carolina Local Government Comprehensive Planning Enabling Act of 1994 (S.C. Code Title 6, Chapter 29). A county may adopt a zoning ordinance once its governing body has adopted at least the land-use element of a comprehensive plan -- but it doesn't have to, and a meaningful number of rural South Carolina counties have chosen not to adopt countywide zoning, or have zoned only specific areas rather than the entire unincorporated county.

Practically, that means the very first question for a South Carolina land parcel outside a municipality isn't just "what is it zoned," it's "is there any county zoning here at all." A parcel in an unzoned county can be far less restricted in some ways (no zoning district to check) and far less predictable in others (no guarantee your neighbor can't put something incompatible next door, and no zoning-based protection to rely on). Confirm directly with the specific county planning or building department whether countywide zoning exists, and if so, for which parts of the county -- never assume either way from a listing or from how a neighboring county operates.

Municipalities (cities and towns) are covered by the same enabling act and commonly do zone, so a parcel inside city limits is more likely to have an applicable zoning ordinance than one in the unincorporated county -- but that also has to be confirmed parcel by parcel.

The Coastal Zone Management Act: direct state authority in 8 named coastal counties

South Carolina's real statewide land-use overlay is the South Carolina Coastal Zone Management Act of 1977 (S.C. Code Title 48, Chapter 39). It applies only within a defined coastal zone covering eight named coastal counties: Beaufort, Berkeley, Charleston, Colleton, Dorchester, Georgetown, Horry, and Jasper. Within that mapped coastal zone -- and specifically within its "critical areas" (coastal waters, tidelands, beaches, and the beach/dune system) -- the administering state agency holds direct permitting authority over construction and alteration, independent of and in addition to whatever county zoning otherwise applies.

That agency has changed names recently: coastal management authority was long housed in DHEC's Office of Ocean and Coastal Resource Management (OCRM). Following a 2023 state government restructuring act, DHEC split on July 1, 2024 into two separate agencies -- the South Carolina Department of Environmental Services (SCDES), which took over environmental permitting including coastal management, and the South Carolina Department of Public Health (DPH), which retained public-health functions. OCRM is now organized as SCDES's Bureau of Coastal Management. Older documents, county staff, and even some current listings may still refer to "DHEC" or "OCRM" out of habit -- the authority and the critical-area permit requirement are the same, just under a new agency name.

Outside the eight-county coastal zone -- which is most of South Carolina by land area, including virtually the entire Upstate and Midlands -- this overlay does not apply at all, and a parcel's land use is governed by county (if any) and municipal zoning alone, with no coastal critical-area permit in the picture. Even within the eight coastal counties, most parcels are not literally inside a mapped critical area -- the direct permitting requirement is tied to the specific critical-area boundary (tidelands, beach/dune system, coastal waters), not the county line -- so confirm a specific parcel's critical-area status with SCDES rather than assuming a coastal-county address alone triggers it.

Septic: a state regulation, permitted through SCDES's own regional offices

Onsite wastewater systems (septic systems) in South Carolina are governed by a single statewide technical standard, Regulation 61-56, most recently amended effective July 1, 2022. As with coastal management, permitting authority for Reg. 61-56 moved from DHEC to SCDES in the July 2024 restructuring.

The permit itself is issued by SCDES through its own network of regional offices (South Carolina is divided into a handful of environmental-services regions, each serving a group of counties) -- not by a separate county health department. That's a meaningfully different arrangement from states like Florida or New Jersey, where a county or municipal health department administers a state septic standard: in South Carolina, the office reviewing your site evaluation and issuing the septic permit is itself a state agency office, even though it's organized regionally and often referred to informally as "the local DHEC (or DES) office." County government still has a separate role -- county building and zoning departments generally require their own permits and often coordinate with SCDES on timing -- so both a state septic permit and, where applicable, a county building/zoning permit are typically needed.

What this means for due diligence

Start by confirming whether the county has adopted any zoning at all, and if so, whether it covers the specific parcel -- don't assume either way in South Carolina, since county zoning is optional and coverage varies widely. Then check independently whether the parcel sits within one of the eight coastal-zone counties and, if so, whether it falls inside a mapped critical area; if it does, a SCDES (formerly DHEC OCRM) critical-area permit applies on top of whatever county zoning exists, and that check matters for a real, though geographically bounded, share of the state's land. Finally, confirm septic feasibility with the SCDES regional office covering that county under Regulation 61-56 -- that's a state permit process everywhere in South Carolina, separate from, and in addition to, any county zoning or building permit requirement.