Off-Grid Living in Edgefield County, South Carolina

If you're looking at raw land in Edgefield County, South Carolina, for an off-grid setup, here's what I've been able to pin down from the county's own documents, and where the trail runs cold.

Zoning. Unlike some rural South Carolina counties, Edgefield County does have countywide zoning, run by the Building and Planning Department under the county's Land Development Ordinance and 2019 Comprehensive Plan. There's also word (from secondary reporting, not yet confirmed in the ordinance text I could pull) that the county was working on a new Residential Agriculture zoning district as of early 2025. If you're buying land specifically to homestead, I'd call Building and Planning before you close, to check the parcel's current district and whether that new district has landed.

Dwellings, tiny homes, RVs. The county code has dedicated sections on manufactured housing and a whole chapter on manufactured homes, which tells me the county does regulate mobile/manufactured dwellings specifically. But I couldn't get to the actual setback, minimum square footage, or RV-as-residence rules in what's publicly posted. This is a "call before you site anything" situation.

Building permits. These are mandatory and administered by the county. You start by bringing a recorded plat to Building and Planning, who check it against drainage, easements, and setbacks. Construction has to follow the International Residential Code, as adopted by the state. A Certificate of Occupancy is the final sign-off, and the county's own packet notes a plumbing leak test is part of that inspection process.

Septic and composting toilets. Once your plat is approved, you apply for a septic permit through the state's Department of Environmental Services (SCDES, the renamed DHEC), or get authorization through the Edgefield County Water and Sewer Authority. I found nothing in county materials suggesting composting toilets are accepted as your only wastewater system, this is the state's Reg. 61-56 territory, so ask SCDES directly.

Greywater and rainwater. No county-specific rules turned up for either. That means you're default back to the state baseline: SCDES treats greywater reuse as an engineered subsurface system requiring a licensed SC engineer's design, and rainwater harvesting doesn't have a clear county ordinance one way or the other. Confirm with Building and Planning before you install anything.

Wells. The county's own housing packet treats a private well plus septic as a legitimate path, separate from hooking into the county water/sewer authority. Well drilling standards themselves are set at the state level.

Going off-grid on utilities. Edgefield County doesn't require you to hook up to the electric grid to live in a house here. But skipping the grid doesn't get you out of plat review, building permits, septic/water sign-off, or the final Certificate of Occupancy, that whole chain still applies whether or not you're pulling power from a utility pole.

Bottom line: Edgefield's zoning and building-permit rules are real and enforced, but several off-grid-specific questions just aren't spelled out in what's publicly posted, so a phone call to Building and Planning will save you guesswork.