Off-Grid Living in Berkeley County, South Carolina

I've been digging into what it actually takes to live off-grid in Berkeley County, South Carolina, and the short version is: this is a zoned county, which changes the picture compared to some of the more wide-open unzoned counties in the state. Here's what I found, all from official Berkeley County and state sources.

Zoning. Unlike counties with no zoning at all, Berkeley County has adopted a countywide Zoning and Development Standards Ordinance, administered by the Planning and Zoning Department. That means what you can do with a parcel (including off-grid setups) depends on its zoning district. If you're eyeing land, I'd request a zoning verification letter from the county before you buy or move onto it. Note this only covers unincorporated areas; if the parcel sits inside Moncks Corner, Goose Creek, Hanahan, or another town, that municipality's own code applies instead.

Dwellings, tiny homes, RVs. RVs are not allowed as permanent dwellings in the county, only in approved RV parks, mirroring the state/county shared framework. Tiny homes built to code on a permanent foundation are treated differently than wheeled units (which fall under RV/DMV rules). ADUs get case-by-case review by Planning and Zoning, but I couldn't confirm specific size caps from an official county page, so ask the department directly.

Building permits. Berkeley County Building Codes Enforcement requires a permit before you build, consistent with state-adopted codes. The county itself says some buildings are exempt, but doesn't spell that out publicly, so call the permit office to find out if your structure qualifies.

Septic. Septic is state-controlled through SCDES, but the county requires SCDES authorization (or acceptable assurance) before a new lot's plat can be approved. Berkeley County goes a step further than the state baseline: it explicitly bans shared or community septic facilities in unincorporated areas. Composting toilets aren't addressed on the county's page, so treat that as unconfirmed and default to SCDES rules.

Greywater. No Berkeley County-specific greywater ordinance turned up in my research. This falls back to the state SCDES framework, and I couldn't confirm any added local restriction.

Rainwater harvesting. I found no county page addressing rainwater collection at all, permits, caps, nothing. That's genuinely unclear, so ask Planning and Zoning or Codes/Permitting before you install a system.

Wells. Same plat-approval trigger as septic: SCDES authorization for a well has to be on file before the county approves a new lot's plat. Substantively, wells are governed by state SCDES regulations, not a distinct county well ordinance.

Utility disconnection. Nothing in county code bars going off-grid on power or water outright, but occupying any structure still requires the septic/well authorization and building permit described above. So the disconnection itself isn't restricted, but the structure and its water/wastewater systems are.

My overall take: Berkeley County is workable for off-grid living but it's not a free-for-all, the zoning layer plus the septic/well plat-approval requirement mean you need to talk to the county before committing to land.