Off-Grid Living in McCormick County, South Carolina

I've been digging into what off-grid living actually looks like in McCormick County, South Carolina, and the short version is: this is one of the SC counties where county-level zoning genuinely matters, so you can't just assume "rural = anything goes."

Zoning is countywide here. Unlike some SC counties that skip zoning entirely, McCormick County has a Zoning Ordinance administered by the county's Planning & Zoning Department, with a Planning Commission that recommends districts and rules to County Council. This matters a lot if your plan involves parking a camper or RV on raw land: the county specifically amended its ordinance to add campers as a prohibited use in the Forest Agricultural and Rural Development zoning designations. So the "just live in an RV while I build" strategy is blocked in those two districts, at minimum. Always confirm your parcel's actual zoning district with the Planning & Zoning Department before buying land with an off-grid plan in mind.

Dwellings and tiny homes get sorted by the same zoning ordinance's use matrix and lot/building standards. I didn't find any countywide provision that specifically blesses tiny homes as standard dwellings, so treat that as an open question to raise directly with zoning staff.

Building permits are mandatory and state-code-enforced locally, through the county Building Department. Any new construction, alteration, or manufactured home placement needs a permit and inspection, and contractors need state licensing.

Septic and wells are both state matters, not county matters. As of a 2024 restructuring, septic permitting moved from DHEC to the new SC Department of Environmental Services (SCDES), governed by the statewide onsite wastewater regulation. Wells work the same way: SCDES runs a Notice-of-Intent process under the state's well permitting regulation, and only certified SC well drillers can do the work. McCormick County's own water/sewer ordinance chapter covers the county's own utility systems, not private wells, so it doesn't override the state process.

Greywater and rainwater harvesting are genuinely murky here. I couldn't find a McCormick County ordinance addressing either one, which means greywater defaults to whatever SCDES's statewide engineered-reuse rules require, and rainwater harvesting isn't clearly addressed anywhere I could find, county or state. Don't assume that means unregulated, it likely just means it hasn't been written down clearly. Ask the county Building or Zoning Department before you install a cistern system.

Bottom line on going fully off-grid: there's no ordinance that outright bans disconnecting from utilities, but every inhabited structure still needs the standard zoning permit, building permit, and Certificate of Occupancy trail. Your realistic path is picking a district where camper/RV use isn't prohibited, then working through building, septic, and well permits with the right state and county offices before you settle in.