Oliver County, North Dakota requires a building or zoning permit for houses and other structures, including farm-exempt structures1. The county administers zoning, and onsite wastewater work requires a local public health permit before it begins23. RV living, tiny-home occupancy and a general building-inspection schedule remain unconfirmed, so settle those questions with the Planning & Zoning Department before buying or building4.
At a glance
- Building permit
- Required for houses and other structures, including structures that are otherwise farm exempt1
- Zoning
- Yes; Oliver County administers a zoning ordinance and regulates county land uses24
- Septic permit
- Required from the local public health unit before onsite wastewater work begins3
- RV living
- No private-land occupancy rule confirmed; ask county Planning & Zoning before using an RV as housing4
- Tiny homes
- No specific occupancy or minimum-floor-area rule confirmed; county permit and zoning review still apply14
- Owner-builder
- No owner-builder exemption from the county permit requirement was confirmed5
- Private well
- State appropriation permit required above 12.5 acre-feet per year; qualifying lower-use wells must be reported6
Who to call
Building permits
Oliver County Planning & Zoning Department
Building and zoning permit applications, land-use questions and Planning & Zoning Board review
PO Box 188, Center, ND 58530
Septic permits
Western Plains Public Health Onsite Septic System Program
Onsite septic applications and environmental-health service for Oliver County
403 Burlington St SE, Mandan, ND 58554
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 Oliver County, North Dakota?
Yes. Oliver County says every house and other structure requires a permit, even when the structure is otherwise farm exempt1. North Dakota separately exempts an agricultural building from the state building-code chapter only when it is not used for human habitation or by the public, but that state exemption does not erase Oliver County's local permit requirement71. County permit fees published in the reviewed commission record run from $25 for the smallest residential category to $100 for larger residential work, commercial, industrial and agricultural projects8. North Dakota's state code framework took effect in its updated form in 2026, but state Community Services does not enforce it910. We could not confirm that Oliver County separately adopted and enforces that construction code, so ask Planning & Zoning which technical code and inspections apply to the proposed building4.
Who handles Oliver County building permits, and how do you reach them?
Oliver County's Planning & Zoning Department is the first stop for building and zoning permits14. Contact the department at 701-794-8721 or [email protected], or write to PO Box 188, Center, ND 585304. The county says a building without a variance does not require a public hearing, but the Planning & Zoning Board issues it only after approval by the Board of County Commissioners4. A building-permit application may be submitted at least one week before the next Planning & Zoning meeting11. Conditional-use, zoning-change and ordinance-amendment applications have a longer deadline because public notice is required11. The county has not published a general construction-inspection schedule that we could confirm, so ask the department about plan documents, inspections and closeout requirements before scheduling contractors4. An occupancy permit is required before electrical power is supplied to a building or structure in the zoned area12.
Does Oliver County have zoning?
Yes. Oliver County has an adopted zoning ordinance, and its Planning & Zoning Division regulates county land uses24. The practical limits depend on the parcel's district and soil classification: Soil Division II lots require at least 100 feet of width and 20,000 square feet of area, while Soil Division III lots require at least 150 feet of width and 40,000 square feet of area13. A single-family principal building and its accessory buildings may cover no more than 40% of the lot in the applicable residential district14. A single-family dwelling is also limited to 2.5 stories and 35 feet in height15. Those figures are district-specific, not universal permission to build, so have Planning & Zoning identify the parcel's district and applicable uses before relying on them134. A lot abutting a state or federal highway has separate access limits and requires written approval from the appropriate highway authority16.
How do septic permits work in Oliver County?
A local public health permit is required before onsite wastewater work begins in North Dakota, and the installer also needs a state license3. Western Plains Public Health's Onsite Septic System Program serves Oliver County and publishes the application for that work1718. Contact the program at 701.667.3370 or [email protected], 403 Burlington St SE, Mandan, ND 5855418. Western Plains requires an inspection while the system is still open, and the permit holder must call 24–48 hours before completion to arrange it19. Site feasibility deserves attention before choosing a house location because only about 18% of Oliver County soils are rated without severe limitations for a conventional septic drain field20. That soil rating does not prohibit a system, but it makes professional site evaluation and a design matched to the parcel especially important2018.
Can you live in an RV or tiny home on your land in Oliver County?
We could not confirm an Oliver County rule that allows or prohibits full-time RV occupancy on private land, and North Dakota's state-park camping rule does not decide private-land occupancy21. Ask Oliver County Planning & Zoning whether an RV may be occupied on the particular parcel, including while a house is under construction, before arranging utilities or moving in4. We also could not confirm a county rule specific to tiny-home occupancy or a countywide minimum dwelling floor area4. A tiny home should not be assumed exempt because Oliver County says houses and other structures require permits1. A factory-built modular home can also trigger state factory-inspection requirements, while a new manufactured home installed for residential use must use a state-licensed installer and inspector2223. No owner-builder exemption from Oliver County's permit requirement was confirmed5.
Building a home in Oliver County: the steps, in order
- Ask Oliver County Planning & Zoning to identify the parcel's zoning district, allowed residential use and lot standards24.
- Confirm highway or road access early; lots abutting a state or federal highway face an access limit of one per quarter mile and require written highway-authority approval16.
- Contact Western Plains Public Health for the onsite septic application and site-specific requirements before wastewater work begins318.
- Submit the building-permit application at least one week before the applicable Planning & Zoning meeting; allow at least three weeks for a conditional use, zoning change or ordinance amendment11.
- Arrange the open-system septic inspection 24–48 hours before completion19.
What should you check before buying land in Oliver County?
Start with the zoning district, permitted use, lot dimensions and buildable area because Oliver County's lot size, coverage and height standards vary by district131415. Verify legal access before closing, especially on a lot abutting a state or federal highway, where county zoning limits access and requires written highway-authority approval16. Test septic feasibility early because about 18% of county soils avoid severe conventional-drain-field limitations20. For a private well, a state water-appropriation permit is required above 12.5 acre-feet per year, while qualifying lower-use domestic and livestock wells must still be reported to the Department of Water Resources6. Oliver County averages about 17.9 inches of precipitation per year, so verify the parcel's dependable water source rather than assuming a shallow well will meet household and livestock needs246. Budget for an effective property-tax rate near 0.6% and a median annual property-tax bill near $1,3632526.
Watch-outs
- Farm-exempt status does not remove Oliver County's permit requirement for a structure1.
- An occupancy permit is required before electrical power is supplied to a building or structure in the zoned area12.
- Septic inspection happens before the open system is covered, with 24–48 hours of advance notice required19.
- RV occupancy, tiny-home occupancy and a general building-inspection schedule remain unconfirmed; ask Planning & Zoning for a parcel-specific answer4.
- Highway frontage does not guarantee a new driveway because access is limited and written highway-authority approval is required16.
Sources
- Oliver County ND Planning & Zoning (2026 county census)
- Oliver County ND Revised Zoning Ordinance (2026 county census)
- On-Site Wastewater Treatment Systems (North Dakota statewide rule), quoted and re-checked
- Oliver County Planning & Zoning Department (olivercountynd.org)
- (2026 county census)
- Water Appropriation Permits (North Dakota statewide rule), quoted and re-checked
- North Dakota Century Code Chapter 54-21.3, State Building Code (North Dakota statewide rule), quoted and re-checked
- May 2, 2024 County Commission Minutes, quoted and re-checked
- Building Codes | Commerce | North Dakota (North Dakota statewide rule), quoted and re-checked
- Building Codes (North Dakota statewide rule), quoted and re-checked
- Building & Zoning Permit Applications, quoted and re-checked
- Oliver County Revised Zoning Ordinances, quoted and re-checked
- Oliver County Revised Zoning Ordinances, quoted and re-checked
- Oliver County Revised Zoning Ordinances, quoted and re-checked
- Oliver County Revised Zoning Ordinances, quoted and re-checked
- Oliver County Revised Zoning Ordinances, quoted and re-checked
- Western Plains Public Health - Onsite Septic System Program (2026 county census)
- Western Plains Public Health Onsite Septic System Program (westernplainsph.org)
- Onsite Sewage Treatment System Permit for Construction/Use, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Parks and Recreation FAQ (North Dakota statewide rule), quoted and re-checked
- 2026 North Dakota State Building Code Book (North Dakota statewide rule), quoted and re-checked
- Manufactured Home Installation Program (North Dakota statewide rule), quoted and re-checked
- Annual precipitation: Bolthole Index county data
- 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.