Off-Grid Living in Fall River County, South Dakota

Fall River County, South Dakota is one of the more unusual counties I've researched for off-grid purposes, mainly because it has no countywide planning and zoning department. That's not the state baseline for South Dakota (zoning varies county by county), it's a deliberate local choice this county has made. The upshot: if your land is outside the city limits of Hot Springs or Edgemont, a lot of what would normally be handled by a zoning office or building department instead falls on you to figure out. The county even publishes an informal guide called "Code of the West" that flags common rural landowner issues (plats, floodplain, septic, water access) precisely because there's no formal review process to catch them.

Zoning and dwellings: With no zoning ordinance, I found no county rule distinguishing tiny homes, RVs, or unconventional dwellings on raw land. That said, this is genuinely unclear rather than a green light, because there's no office to confirm it with at the county level. If your structure counts as a manufactured or mobile home, South Dakota state law still requires it be registered and titled in the new owner's name. Inside Hot Springs or Edgemont, city hall runs its own building and zoning system entirely separate from the county.

Building permits: The Fall River County Planning & Zoning page states a building permit is only required if the structure sits in a flood plain. Separately, South Dakota Codified Law requires property changes be reported to the county Director of Equalization, and commercial or agricultural structures above certain valuations trigger a call to that office too, but that's for tax assessment, not construction review.

Septic: The county defers entirely to the State of South Dakota's Department of Agriculture and Natural Resources (DANR) for septic regulation, including the state minimum lot size for a wastewater system under SDCL 74:53:01:16. I did not find a county-specific septic lot-size rule layered on top, unlike some neighboring counties.

Greywater and rainwater: Neither is addressed on the county's site. Given how often the county's own materials mention that water access is a real practical challenge here (dry wells, no rural water in many areas, some homes relying solely on trucked-in cistern water), I'd guess rainwater catchment is common in practice, but there's no formal county permitting rule I could confirm either way.

Wells: Regulated by the state's DANR Water Rights Program, as is standard statewide. The county's own guidance is really a warning: confirm water access before you buy, because it isn't guaranteed everywhere.

Utilities: No county ordinance bars off-grid or utility-disconnected living, which tracks with there being no zoning/building code covering most unincorporated land in the first place. Any electrical or plumbing work you do is still subject to South Dakota's state licensing boards.

Bottom line: this is a county where the absence of rules can feel like freedom, but it also means you're the one who has to catch problems (floodplain, septic lot size, water access) before they catch you.