Building permits, zoning and land rules in Mountrail County, North Dakota

Yes. Unincorporated Mountrail County requires a building permit for residential construction, although the current form does not establish every permit trigger or exemption for every structure type¹. The application must include building plans and a site plan showing setbacks and a floor plan¹. Any needed conditional-use or variance approval must come before the building permit, final approval belongs to the Planning and Zoning Board, and the issued permit must be posted near the work site¹. The building permit fee for residential, rural-residential, agricultural and recreational buildings is $100 on the form revised October 10, 2025¹. North Dakota's current State Building Code took effect in 2026, but local jurisdictions elect whether to administer and enforce it; we could not confirm that Mountrail County administers the state code for ordinary residential construction, so ask Planning & Zoning which code and inspections apply⁸.

Mountrail County Planning & Zoning handles the county building-permit application and zoning questions at PO Box 248, Stanley ND 58784-0248; call 701-628-2909 or email melissav@co.mountrail.nd.us². The county page provides the building-permit application, the Land Development Code and a map identifying cities and townships with their own zoning authority². Septic permits are handled separately by Upper Missouri District Health Unit⁹. Start by giving the office your parcel number and proposed use so staff can identify the correct jurisdiction and zoning district. The current county form lists a $100 building permit fee for agricultural, residential, rural-residential or recreational buildings, $350 for commercial buildings, $500 for industrial buildings and $25 for a demolition permit¹. The form says certificates expire one year after issuance¹. We could not confirm an owner-builder exemption from county building-permit or inspection requirements, so an owner planning to act as general contractor should ask Planning & Zoning before relying on one.

Yes. Mountrail County publishes a Land Development Code adopted in 2022, zoning layers and a map of cities and townships with their own zoning authority². The answer can change with the parcel because cities and some townships administer their own rules². Setbacks differ by county zoning district, and the county measures them from the edge of the eaves to the property line¹. Confirm the governing authority and district before judging setbacks, lot area or an allowed use. We could not confirm a county minimum dwelling floor area or minimum lot size, so ask the authority responsible for the parcel. North Dakota exempts a building used for agricultural purposes from the state building-code chapter only when the building is not a place of human habitation and is not for public use; that state exemption does not by itself erase county zoning or permit review⁷.

Upper Missouri District Health Unit issues septic (onsite wastewater) permits in Mountrail County, while North Dakota licenses installers^3,4. Contact Environmental Health through the Williston office at 701-774-6400 or 1-877-572-3763; the office is at 110 W. Bdwy, Suite 101, Williston, ND 58801⁹. A permit is required before constructing, altering, repairing or extending a system, though regular maintenance does not require one¹⁰. Give the district at least two working days' advance notice and do not cover the installation before inspection unless the district gives prior approval¹¹. The permitting authority must conduct the requested installation inspection within one business day after receiving the request¹⁰. Where water under pressure is not available, human waste must go to an approved privy, chemical toilet or other installation the health unit accepts, and a privy needs health unit approval¹¹. Where public or non-community sewer is available within 200 feet of an occupied premises, the health unit requires connection to that system¹¹. About 64.8% of county soils rate free of severe limitations for a conventional drain field, but an individual parcel still needs site-specific review¹².

We could not confirm a general rule allowing or prohibiting full-time RV living on private land in Mountrail County. The North Dakota state-park camping limit applies only to state-park campsites and cabins, so it does not answer the private-land question¹³. Ask the zoning authority for the parcel whether an RV can be occupied during construction or used as a residence, and ask Upper Missouri District Health Unit what approved sanitation arrangement would be required^2,11. We also could not confirm a special tiny-home occupancy rule or minimum dwelling size. A tiny home proposed as a structure in unincorporated county jurisdiction still enters the county building-permit and zoning process^1,2. A new manufactured home has a separate statewide installation rule requiring a licensed installer and licensed inspector¹⁴.

1. Use the county map and Planning & Zoning office to confirm whether Mountrail County, a city or a township governs the parcel².
2. Confirm the zoning district and resolve any conditional-use or variance request before the building permit can issue¹.
3. Prepare building plans and a site plan showing the floor plan and property-line setbacks measured from the eaves¹.
4. Apply to Upper Missouri District Health Unit for a septic permit before septic work begins, then schedule inspection before covering the installation^4,11.
5. Ask Road & Bridge about a road approach permit; the published review and inspection fee is $100 per agricultural or residential approach and $200 per commercial or industrial approach⁵.
6. Submit the county building permit application and fee, then wait for Planning and Zoning Board approval¹.
7. Post the approved permit near the construction site¹.

Verify zoning jurisdiction first because county, city or township rules may govern the parcel². Check the proposed building envelope against district-specific setbacks, which Mountrail County measures from the eaves to the property line¹. Mountrail County regulates subdivisions through Planning & Zoning, but requirements may differ where a city or township has its own development rules¹⁵. A split creating two or more contiguous lots requires a public hearing and a recorded final plat¹⁵. Confirm access before closing because new county-road approaches require County Road and Bridge approval, while township-road approaches require township approval⁵. About 88.9% of county land has a slope of 15% or less, while 64.8% of soils rate free of severe conventional-drain-field limits; neither countywide figure replaces a parcel survey or septic evaluation¹². Mountrail County averages 17 inches of precipitation annually and severe drought in 12.3% of years, so resolve a dependable water source before purchase¹².