Off-Grid Living in Butte County, South Dakota

I'll level with you upfront: Butte County, South Dakota doesn't have a lot of its regulatory language sitting out in public-facing documents, so a good chunk of this guide is "here's what I could confirm, here's what you need to call and ask." That's honest research, not a cop-out, and I'd rather tell you that than pretend I found a rule that isn't there.

Zoning. Butte County runs its land-use decisions through its Equalization & Planning Department and an active Planning Commission, which handles rezoning, conditional use permits, and subdivisions under state enabling law (SDCL 11-2). The commission has been updating its subdivision ordinance and references an ordinance number in its procedures, but I could not pin down the actual zoning district map or minimum lot sizes for raw land from official sources. Call Planning before you buy bare acreage and assume you can just live on it.

Dwellings, tiny homes, RVs. No county-specific language on tiny homes or RVs-as-residences turned up in my research. This is a county-level call in South Dakota, so you need to ask Equalization & Planning directly rather than assume a statewide default applies.

Building permits. The county's Equalization and Planning office issues building permits for anything outside Belle Fourche city limits, and that office is the one to call, at 605-892-3950. Whether Butte County has formally adopted a specific building code (like the IRC) wasn't confirmed in what I found, so ask them that directly too.

Septic. This one's clearer: a septic permit is required before you install or modify any wastewater system, the system has to be designed/approved by a Professional Engineer, and installed by a state-licensed installer, tying into South Dakota's statewide septic rules (admin. rule chapter cited by the state, not the county). Composting toilets aren't separately addressed anywhere I found, so that's a direct question for the county office too.

Greywater. No county or state guidance found. Ask Equalization & Planning before building any greywater system.

Rainwater harvesting. No county ordinance found. At the state level, small-scale domestic water use, including catchment, generally doesn't need a water right permit unless you're using more than 25,920 gallons a day or pumping over 25 gallons per minute, per SD DANR.

Wells. Wells are regulated statewide by DANR's Water Rights Program, and all wells must meet South Dakota's well construction standards. If a water right permit is needed it has to be approved before drilling starts, but ordinary domestic use below those thresholds above typically doesn't need one. No added county well rule was found.

Off-grid utilities. I found nothing in county or state sources that bans disconnecting from the grid or requires hookup as a condition of occupancy. That said, your building and septic permits still apply no matter your utility status, so don't read "no ban" as "no paperwork."

Bottom line: Butte County is workable for off-grid living, but a fair amount of the fine print (zoning specifics, dwelling minimums, composting toilets, greywater) simply isn't published where I can verify it. Call the county planning office before you commit to land or a build plan.