Off-Grid Living in Dunn County, North Dakota

I've been digging into what it actually takes to live off-grid in Dunn County, North Dakota, and the honest headline is: there's more structure here than in a lot of rural ND counties, because Dunn County actually has a countywide zoning ordinance, administered by the Planning & Zoning office. That's not true everywhere in the state, so don't assume your experience in a neighboring county transfers here.

Zoning. Dunn County zones its unincorporated land, with different rules for agricultural, industrial, and oil-field uses (Dunn County sees a lot of oil activity, so setbacks matter). The most relevant district for someone wanting raw land to build a homestead is "Rural Preservation," and as of early 2025 that district required a five-acre minimum lot for a single-family home. County commissioners have talked about loosening that, but as far as I can confirm, no vote has happened, so treat five acres as the number to plan around until you hear otherwise from the county.

Dwellings, tiny homes, RVs. I could not find an official Dunn County document spelling out minimum dwelling sizes or how the county treats tiny homes and RVs as permanent residences. Some secondhand sources suggest RVs get treated as temporary structures, but I can't verify that from an official source, so call Planning & Zoning before you buy or place anything unconventional.

Building permits. The county lists permit forms and applications on its own site, run through offices like the Auditor and Road Department. North Dakota separately requires a septic/sewage permit tied to any new construction, and that's a state-level requirement layered on top of whatever the county requires.

Septic. This runs through Southwest District Health, which serves Dunn County residents. Statewide, the ND Department of Environmental Quality licenses septic installers, and you need a permit from your local public health unit before work starts. I'd call Southwest District Health directly since their specific onsite-wastewater webpage wasn't something I could pull up cleanly.

Greywater. Genuinely unclear, both at the state and county level. No rule explicitly allows or bans residential greywater reuse, so ask Southwest District Health before you install a separate system.

Rainwater. No Dunn County restriction found. This inherits the state's general permissiveness, though a large storage tank or underground cistern might trigger the county's normal building permit process.

Wells. Dunn County is a member county of the Southwest Water Authority, a regional political subdivision that serves a lot of the area, including through the OMND water treatment plant covering several nearby communities. If you're drilling a private well instead, standard state well-construction rules apply; I didn't find evidence the county adds its own layer on top.

Utilities. No county requirement forcing a grid hookup that I could locate. Off-grid power itself isn't state-regulated, but it's worth confirming with Planning & Zoning whether any occupancy permit in your specific zoning district assumes utility connection.

Bottom line: Dunn County is workable for off-grid living, but the Rural Preservation five-acre minimum and several unconfirmed details mean you should talk to the county and Southwest District Health before committing to a piece of land.