Off-Grid Living in Marshall County, South Dakota

Marshall County, South Dakota surprised me a bit when I dug into it, because a lot of rural South Dakota counties have little or no zoning, and Marshall County actually does. It has an active, recently amended countywide zoning ordinance, administered by the county's Planning & Zoning office, and that changes some of the "wide open, no rules" assumptions people sometimes bring to off-grid land shopping in the state.

Zoning and building permits. Marshall County's zoning ordinance, which the county has kept updating (there was a campground-related amendment that took effect in September 2025), requires a permit from the Zoning Administrator before you erect, move, add to, or structurally alter a building, structure, or even a driveway. On top of that, the county's building permit rule kicks in once the value of improvements crosses a threshold set in the ordinance, so smaller projects may be exempt but you'd want to confirm the current number with the Zoning Administrator rather than trust anything you read elsewhere, including here. Whether you can put up an off-grid cabin, yurt, or similar structure without a lot of hassle really depends on how the Zoning Administrator applies the ordinance to your specific parcel and structure type.

Tiny homes and RVs. I could not find explicit Marshall County language spelling out whether a tiny home or RV can be a year-round residence. The ordinance's definition of "structure" is broad, and the county has added campground-specific rules recently, which hints there is coverage somewhere in the code for RVs and similar dwellings, but I'd call the Planning & Zoning office directly before assuming anything.

Septic and composting toilets. Septic systems are governed at the state level by South Dakota's Department of Agriculture and Natural Resources (DANR) under the state's onsite wastewater rules, but actual permitting and site approval happens county by county. In Marshall County, that appears to run through the Planning & Zoning office. I didn't find anything specific to composting toilets in county text, so ask locally.

Greywater and rainwater. I found no Marshall County ordinance and no DANR rule specifically addressing residential greywater reuse or rainwater harvesting. That leaves both in genuinely unclear territory here, not because they're banned, but because nobody's written a rule down that I could locate. Ask the county zoning office directly.

Wells. Wells follow South Dakota's statewide well construction standards, administered by DANR's Water Rights Program, with licensed well drillers required and standard exemptions for smaller domestic use. I found nothing suggesting Marshall County adds its own layer on top.

Living off-grid utilities. I didn't find any rule, state or county, that bars disconnecting from the grid or forces a utility hookup. Your building permit obligations under the county ordinance still apply regardless of whether you're grid-tied.

Bottom line: Marshall County is more regulated than the "rural South Dakota, do what you want" stereotype, so budget time for a real conversation with the Zoning Administrator before you buy or build.