Unincorporated Billings County, North Dakota requires building and zoning approval before new construction or a move-in structure, and completed work receives a final inspection or certificate of occupancy after compliance review.1 County zoning applies across unincorporated areas except where a city exercises extraterritorial zoning.2 Secure Southwestern District Health Unit approval for onsite water and sewage facilities before submitting the county application.3
At a glance
- Building permit
- Required for new construction and move-in structures1
- Zoning
- Yes in unincorporated areas, except where a city exercises extraterritorial zoning2
- Septic
- Health-unit approval is required before the county building or zoning application3
- RV living
- Private-land occupancy rule not confirmed; ask Planning & Zoning4
- Tiny home
- No distinct occupancy rule confirmed; county zoning and building approval still apply14
- Owner-builder
- No exemption confirmed; ask Planning & Zoning and Building Inspections5
- Minimum lot size
- Five acres in the Residential District, with a limited exception for older lots6
- Private well
- State appropriation rules depend on annual withdrawal7
Who to call
Building permits
Billings County Planning & Zoning
Building and zoning applications, zoning-board review, subdivision applications and county right-of-way applications
495 4th Street, Medora, ND 58645
Septic permits
Southwestern District Health Unit Environmental Health
Sewage and water facility applications, sewer-system inspections and private-water testing information
528 21st West, Dickinson, ND 58601
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in Billings County, North Dakota?
Yes. Billings County requires a Building & Zoning Certificate before new construction or a move-in structure in the county's jurisdiction.1 The county also requires buildings used for residential or commercial purposes, along with their accessory structures, to comply with the North Dakota State Building Code.8 Plans and construction are inspected for current-code compliance, and the county issues a certificate of occupancy or final inspection when completed work complies.1
The zoning application reaches beyond a new house: the county says a landowner must apply when building, moving in a structure or mobile home, rezoning, or changing an existing building's outside dimensions.9 Agricultural land and buildings receive a limited county-zoning exemption, but road setbacks and floodplain regulations still apply.10 North Dakota's separate agricultural building-code exemption does not cover a building used as a home or by the public.11
Who is the Billings County building department, and how do you reach it?
Start with Billings County Planning & Zoning at the contact shown above; the office receives building and zoning applications and routes matters through the Zoning Board and County Commission.9 For technical building questions and inspections, the county page directs applicants to Building Department and Inspections at 701-260-5373.9
Submit early. County review can take at least one and a half months when a public hearing is required, while an application without a Zoning Board hearing can take up to two weeks.12 The County Commission gives final approval after the Zoning Board process for applications that require that review.12 General county building and zoning fees were not confirmed; North Dakota's code framework leaves permit and plan-review charges to the applicable governing authority.13 Ask Planning & Zoning for the current application, meeting deadline, fee, required plans and inspection sequence before scheduling construction.9
Does Billings County have zoning?
Yes. Billings County zoning applies to unincorporated areas except where an incorporated city has elected to exercise extraterritorial zoning.2 Confirm the parcel's jurisdiction and zoning district before using county standards because a city may control an affected extraterritorial area.14
The Residential District generally requires at least five acres per lot.6 A lot platted before November 5, 2013 may qualify at 40,000 square feet if it meets onsite-sewage standards.6 Major-subdivision standards differ depending on whether public water or sewer is available.6 Hillside and ridgeline standards also limit a sloping-roof building to 33 feet and a flat-roof building to 30 feet where those standards apply.15 Billings County requires approval by both the Zoning Board and County Commission for a subdivision application.16
How do septic permits work in Billings County?
Billings County requires a Water and Sewage Facilities Application approved by Southwestern District Health Unit before county building or zoning approval when onsite facilities are proposed.3 North Dakota also requires the onsite-wastewater installer to obtain the local public-health permit before work begins and to hold a state installer license.17 Southwestern District Health Unit lists sewage and water facility applications and sewer-system inspections among its Environmental Health services.18
Arrange the wastewater review before finalizing a house location or submitting the county package. Only about 13.8% of mapped Billings County soils are rated without severe limitations for a conventional septic drain field.19 That countywide soil measure does not decide an individual parcel, but it makes early site-specific evaluation prudent. We could not confirm the local inspection sequence or whether an off-grid sanitation alternative is acceptable; ask Environmental Health before choosing a system.18
Can you live in an RV or tiny home in Billings County?
We could not confirm a Billings County rule that generally allows or prohibits living in an RV on private land. Ask Planning & Zoning how the parcel's district treats residential RV occupancy, temporary occupancy during construction and utility connections before moving onto the land.9 County zoning still applies in unincorporated areas outside a city's extraterritorial jurisdiction.2
Billings County does not publish a confirmed tiny-home-specific occupancy rule in the reviewed material. A tiny home used as a dwelling should not be assumed exempt: new construction and move-in structures require county approval, and residential structures must comply with the state building code adopted by the county.18 New manufactured homes installed for residential use in North Dakota must be installed and inspected by state-licensed professionals.20 A general minimum dwelling size and an owner-builder exemption also remain unconfirmed, so obtain parcel- and project-specific answers from Planning & Zoning and Building Inspections.59
Building a home in Billings County: what are the steps?
- Ask Billings County Planning & Zoning to confirm the parcel's governing jurisdiction and zoning district.914
- Check the district's lot-size rules and any hillside, ridgeline, road-setback or floodplain constraints before fixing the building site.61510
- Submit the sewage and water application to Southwestern District Health Unit and obtain approval before the county application.3
- If access crosses county right-of-way, submit the county right-of-way application for the approach and obtain the required approvals.9
- Submit the complete building and zoning package well ahead of construction because review timing depends on whether a public hearing is needed.12
- Do not begin construction until the required county approvals are issued, then coordinate code inspections and the final inspection or certificate of occupancy.1
What should you check before buying land in Billings County?
Confirm jurisdiction, zoning district and legal access first. County zoning covers unincorporated land except areas under a city's elected extraterritorial zoning, and a county right-of-way approach requires approval.29 Check the applicable lot minimum before assuming a parcel is buildable; the Residential District generally requires five acres, with a narrow older-lot exception tied to onsite sewage standards.6
Investigate soils, water and flood exposure before choosing a homesite. Only about 13.8% of mapped soils avoid severe limitations for a conventional septic drain field, and floodplain requirements remain applicable even to otherwise exempt agricultural uses.1910 For a private well, a state water-appropriation permit is required when annual withdrawal exceeds 12.5 acre-feet, while qualifying lower-volume uses have reporting requirements.7 Finally, Billings County's effective property-tax rate is about 0.4%, with a median annual property-tax bill of about $1,189.2122
Watch-outs
- A Building & Zoning Certificate is required before new construction or moving in a structure; allow extra time when a public hearing is necessary.112
- County zoning may not control where an incorporated city exercises extraterritorial zoning, so verify jurisdiction for the exact parcel.2
- Most mapped soils have severe limitations for a conventional septic drain field because only about 13.8% are rated without severe limitations.19
- Private-land RV occupancy, tiny-home-specific occupancy, a general minimum dwelling size and an owner-builder exemption remain unconfirmed; ask Planning & Zoning before buying or building.59
Sources
- Billings County Zoning & Building Applications (2026 county census)
- Billings County Zoning Ordinance, quoted and re-checked
- Billings County Zoning & Building Applications (2026 county census)
- Billings County Zoning Ordinance (2026 county census)
- (2026 county census)
- Billings County Zoning Ordinance, quoted and re-checked
- Water Appropriation Permits (North Dakota statewide rule), quoted and re-checked
- Billings County Zoning Ordinance, quoted and re-checked
- Billings County Planning & Zoning (billingscountynd.gov)
- Billings County Zoning Ordinance, quoted and re-checked
- North Dakota Century Code Chapter 54-21.3, State Building Code (North Dakota statewide rule), quoted and re-checked
- Zoning & Building Applications, quoted and re-checked
- 2026 North Dakota State Building Code Book (North Dakota statewide rule), quoted and re-checked
- Billings County Zoning Ordinance, quoted and re-checked
- Billings County Zoning Ordinance, quoted and re-checked
- Planning & Zoning, quoted and re-checked
- On-Site Wastewater Treatment Systems (North Dakota statewide rule), quoted and re-checked
- Southwestern District Health Unit Environmental Health (swdhu.net)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Manufactured Home Installation Program (North Dakota statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written September 27, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.