Off-Grid Living in Day County, South Dakota

I've been digging into what off-grid living actually looks like in Day County, South Dakota, and the short version is: this county isn't a blank slate. Unlike some rural South Dakota counties that skip zoning entirely, Day County has adopted its own countywide zoning ordinance, administered out of a Planning & Zoning Office in Webster. That matters a lot if you're eyeing raw land here, because whether you can just live on it, park an RV, or build a tiny home depends entirely on which zoning district your parcel sits in.

Zoning. Day County's zoning authority comes from state law (SDCL 11-2), which lets counties set up districts and conditional-use processes. The county maintains current zoning ordinances (with an Article 8 update on record) plus Conditional Use Permit and Variance applications for anything not allowed outright. I don't have the district map or the specific list of permitted uses in front of me, so the honest answer is: call the office and ask what your parcel is zoned and what's allowed there.

Dwellings, tiny homes, RVs. I couldn't find published Day County ordinance text online addressing minimum dwelling size, tiny homes, or RVs-as-residences. That doesn't mean there's no rule, it likely means it's buried in the zoning ordinance the county holds in-house, district by district. Ask Planning & Zoning directly before you buy a used RV to live in year-round.

Building permits. I found a third-party listing referencing "Day County Building Inspections" routed through Planning & Zoning, but no official county page laying out an adopted building code or permit process. South Dakota doesn't have a mandatory statewide building code unless a county or town adopts one, and if Day County has, state law would require it to track the 2021 IBC. Verify this directly, don't assume.

Septic, wells, water rights. These are the areas where the state, via DANR, clearly controls the baseline: septic systems fall under state administrative rules with certified installers, and wells must meet state well construction standards, with a water right generally required except for domestic use. Day County's Planning & Zoning Office handles the local administration (site visits, approvals) on the septic side.

Greywater and rainwater. Both are genuinely unclear. I found no state statute or county page directly addressing residential greywater reuse or rainwater catchment. Small-scale domestic rainwater use may sidestep water-rights permitting since domestic use is generally exempt, but that's not spelled out explicitly anywhere I found.

Utilities. Nothing bars off-grid, utility-disconnected living outright at the state or county level. Electrical work is licensed statewide with an owner's exemption for your own residence, but zoning approval could still come into play for unconventional dwelling types.

One more thing: Day County has eight incorporated towns (Andover, Bristol, Butler, Grenville, Pierpont, Roslyn, Waubay, Webster), each with potentially its own code. This brief is unincorporated county land only.