Off-Grid Living in Richland County, South Carolina

If you're eyeing a piece of land in unincorporated Richland County, South Carolina for an off-grid setup, here's what I found digging through the county code and state pages, and where the trail runs cold.

Zoning first. Richland County runs its own countywide zoning for unincorporated areas through the Planning and Development Services Department, under a consolidated land development chapter that folded together the old zoning, stormwater, and landscape rules. The county uses several district types (general use, planned development, overlay, neighborhood master plan overlay), and what you can actually do on a parcel, including whether bare-land off-grid occupancy is allowed at all, depends entirely on which district it falls in. I can't give you a blanket answer here; you need to pull up the parcel with the Zoning Office. Also worth repeating: if your land is inside Columbia or another municipality, that city's code takes over, not the county's.

Dwellings, tiny homes, RVs. I couldn't confirm official county text on tiny home siting, minimum square footage, or RV-as-permanent-dwelling rules. There are commercial sites floating claims about an "RM-2" district restriction or specific size caps for accessory dwellings, but I have no official county source backing that up, so I'm treating it as unconfirmed. Call the Zoning Office before you commit to a plan.

Building permits are mandatory countywide, administered under the statewide code adopted by the SC Building Codes Council. One important choke point: if your property isn't on public sewer, the county won't issue a building permit until you've got septic approval from SCDES (formerly DHEC) in hand.

Septic is a state matter, run by SCDES, not something Richland County writes its own rules for, though the county enforces the permit-linkage. Part of Richland sits in the Sandhills soil region, where sandy, fast-draining soil can push SCDES toward requiring enhanced treatment systems. I found nothing suggesting a county-specific composting toilet allowance, so the state's restrictive baseline (SCDES Reg. 61-56) applies.

Greywater and rainwater have no Richland-specific ordinances that I could find. Greywater reuse follows the state's engineered-system baseline, and rainwater harvesting is genuinely unclear at both levels, nothing confirming caps, permits, or outright allowance.

Wells fall under statewide SCDES standards; no county-level well ordinance turned up in my search.

Utility disconnection itself doesn't appear to be banned by the county, but living in a structure without going through zoning, building permit, and septic approval isn't really an option if you want to be legal about it.

Bottom line: the zoning district and the septic permit are your two real gatekeepers here, and both require direct, parcel-specific conversations with the county and SCDES.