Off-Grid Living in Grant County, South Dakota

I dug into what's actually on the books for Grant County, South Dakota, and I want to be upfront: this is a rural county with real zoning, which surprises some people who assume "off-grid" and "no rules" go together in the Dakotas. They don't, not here.

Zoning. Grant County has adopted a full Comprehensive Land Use Plan, Zoning Ordinance, Subdivision Ordinance, and Drainage Ordinance, all administered by the county Planning & Zoning Office under the authority granted by South Dakota state law (SDCL Chapter 11-2). So if you're eyeing a piece of unincorporated land here for an off-grid setup, you're working inside county zoning districts, not a blank slate. Towns like Milbank or Big Stone City layer their own municipal zoning on top if you're inside town limits.

Dwellings, tiny homes, RVs. The zoning ordinance defines a "dwelling unit" in general terms (sleeping quarters occupied by a single family) but doesn't call out tiny houses on wheels or long-term RV living specifically in what I could find. That's a real gap. I'd call the Planning & Zoning Office before assuming an RV or THOW qualifies as a permanent residence.

Building permits. The county requires a building permit through the Planning & Zoning Officer, and you'll need to submit a sketch or scaled site plan showing what you're building and where. Permits also apply to site-prep work like grading or filling. I did not find confirmation of which building code edition (IBC/IRC) the county has adopted, so ask directly.

Septic and composting toilets. South Dakota's Department of Agriculture and Natural Resources (DANR) sets the statewide baseline for on-site wastewater systems under its administrative rules, and installer certification is a state program. I could not find a Grant County-specific septic ordinance or health department page, so the local permitting process (likely routed through the county) isn't confirmed. Call the county.

Greywater and rainwater. Neither is addressed at the state or Grant County level in anything I found. That's not a green light, just silence. Confirm directly with the county before building a system around either.

Wells. Wells fall under DANR's Water Rights Program and well construction standards statewide. The county's own building permit review process references water/utility access as part of site planning, but there's no distinct county well ordinance I could confirm.

Utility disconnection. Nothing in the zoning ordinance excerpts I reviewed bans living off-grid outright. You'll still go through the same zoning and building permit process regardless of hookups, and electrical work licensing stays a state matter through the SD Electrical Commission.

Bottom line: Grant County is more regulated than some assume, but plenty of the off-grid specifics (greywater, rainwater, tiny homes) simply aren't spelled out. When rules are silent, that's a "confirm before you build" situation, not permission.