Off-Grid Living in Beaufort County, South Carolina

I've spent a while digging through Beaufort County, South Carolina's official pages for this one, and the first thing I want to flag is a structural quirk: Beaufort County actually has countywide zoning, run through its Community Development Code. That's different from a lot of rural SC counties that have no zoning at all. But if your land sits inside the City of Beaufort, Port Royal, Bluffton, or Hilton Head Island, none of what follows applies directly, those towns run their own separate zoning and building departments. Everything below is about unincorporated Beaufort County.

Zoning: The county's Community Development Code sets up mapped zoning districts (nine "transect zones") that govern land use, setbacks, and accessory structures. This is enforced by Beaufort County Zoning, and raw land isn't exempt from it just because it's undeveloped.

Dwellings, tiny homes, RVs: Manufactured and mobile homes need a zoning permit before you can get a placement permit, per the county's Building Codes office, which also registers all manufactured homes. A septic final permit is generally part of that process too. I could not find anything specific about tiny-houses-on-wheels or long-term RV living as a primary residence, so I'm calling that not confirmed. My guess is the county would fold it into the same manufactured-home rules, but confirm with Zoning directly.

Building permits: Beaufort County enforces state-mandated building, fire, electrical, and floodplain codes locally, through its Building Codes Office. You need the zoning permit first, then the building permit follows.

Septic: This is a state matter, handled by SCDES (formerly DHEC), not the county directly, though the county's own health page routes people there. Beaufort County's coastal soils (high water table, tidal influence) often push septic systems toward more complex engineered designs. I found no county-specific carve-out for composting toilets, so that's a state SCDES Reg. 61-56 question, not confirmed at the county level.

Greywater: Handled by SCDES as a state matter, no county loosening found. Assume the state's engineered-system baseline applies.

Rainwater harvesting: I found nothing from the county on cisterns or catchment systems, permitted or not. That's genuinely unclear, call Zoning and Building Codes before you install one, especially if you'd use it as a primary water source.

Wells: Also an SCDES state matter (drilling, permitting, water quality). But unincorporated Beaufort County has an alternative: the Beaufort-Jasper Water & Sewer Authority (BJWSA) serves much of the unincorporated area with public water and sewer, if you'd rather hook up than drill and dig.

Off-grid utility living generally: No flat ban that I found, but the permitting chain effectively requires either septic or sewer connection, and either a well or BJWSA water. Full permit-free self-sufficiency isn't really a path here.