St. Louis County, Minnesota requires land-use permits for building, moving or adding to structures in county-administered areas, but the county does not administer the Minnesota State Building Code1. The county also administers zoning there, while cities and some townships may have their own rules2. The county Onsite Wastewater Division handles septic systems throughout St. Louis County3.
At a glance
- Building permit
- County land-use permit required for building, moving or adding to structures in county-administered areas1
- Building code
- The county does not administer the Minnesota State Building Code; local administration remains unconfirmed1
- Zoning
- County zoning applies in county-administered areas; cities and townships may administer their own ordinances2
- Septic permit
- Handled countywide by the St. Louis County Onsite Wastewater Division3
- Owner-builder
- State contractor-license exemption may apply if the owner will occupy the home or retain it as a rental4
- RV or tiny home
- Private-land occupancy rules were not confirmed; ask the authority that zones the parcel2
- Private well
- The permitting authority and general permit requirement were not confirmed5
Who to call
Planning & zoning
St. Louis County Planning & Zoning – Duluth Office
Planning and zoning questions for county-administered areas
320 West 2nd Street, Suite 301, Duluth, Minnesota 55802
Zoning
St. Louis County Land Use Division
County-administered zoning, subdivision and floodplain ordinances
Septic permits
St. Louis County Onsite Wastewater Division
Onsite wastewater treatment systems throughout St. Louis County
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 St. Louis County, Minnesota?
For a parcel in a county-administered area, St. Louis County requires a land-use permit to build, move or add to a structure or install a new or replacement foundation1. This is not the same as a building-code permit: St. Louis County expressly says it does not administer the Minnesota State Building Code1. The state code is the statewide standard for structures it governs, but whether another authority administers that code on a particular county-administered parcel remains unconfirmed6. Ask the Land Use Division which approvals apply to the parcel and whether a city or township building official has jurisdiction7. Minnesota's owner-builder provision is only a contractor-licensing exemption; it can cover an owner who will occupy the home or retain it as a rental, but it does not waive permits, inspections or occupancy requirements4.
Who handles St. Louis County building and land-use permits?
St. Louis County's Land Use Division handles the county land-use permit process, and the official online portal accepts applications and calculates project fees from the submitted information8. The division can be reached at 218-471-7103 or [email protected]7. The Planning & Zoning office is at 320 West 2nd Street, Suite 301, Duluth, Minnesota 558029. Because the county does not administer the Minnesota State Building Code, do not treat a county land-use permit as confirmation that all building-code approvals are complete1. General building inspection and certificate-of-occupancy requirements for county-administered parcels were not confirmed in the reviewed county material; ask the Land Use Division who, if anyone, serves as building official for the parcel7.
Does St. Louis County have zoning?
Yes. St. Louis County's Land Use Division enforces Zoning Ordinance 62 and Subdivision Ordinance 60 in county-administered areas10. Incorporated municipalities and townships may administer their own zoning ordinances, so the first parcel-level question is which government has jurisdiction2. The county division also administers Floodplain Ordinance 69 and the Minnesota Wetland Conservation Act in select areas11. Minnesota generally requires a floodplain permit for a house, fill, culvert or bridge in applicable portions of a floodplain, subject to the community's ordinance12. The reviewed sources did not establish one countywide minimum dwelling size, minimum lot size, setback, lot-coverage limit or building-height limit; obtain the zoning district and applicable ordinance from the authority that zones the parcel2.
How do septic permits work in St. Louis County?
The St. Louis County Onsite Wastewater Division administers and coordinates onsite wastewater systems throughout the county under SSTS Ordinance 61 and Minnesota's minimum standards3. Submit the septic application through the county permit portal, or contact the division at 218-471-7103 or [email protected]13. New and replacement systems require a compliance inspection by an authorized, independent qualified employee or licensed inspection business14. Only about 1.2% of county soils are rated without severe limitations for a conventional drain field, so make septic suitability a due-diligence item rather than assuming a standard field will work15. Minnesota's special rules for primitive dwellings do not erase local sanitation requirements, and the county's treatment of privies, holding tanks and other off-grid options remains unconfirmed16.
Can you live in an RV or tiny home in St. Louis County?
The reviewed official sources do not confirm a general rule allowing or prohibiting full-time RV living or tiny-home occupancy on private land in St. Louis County2. Ask the government that administers zoning for the parcel before buying or moving a unit onto the land2. Minnesota's recreational-camping-area law applies to an area accommodating five or more tents or recreational camping vehicles and does not answer the zoning question for one household's RV17. A new manufactured home installed for occupancy must receive the required federal-installation inspection, with local code enforcement depending on the jurisdiction18. A small dwelling still may need the county land-use permit when it involves building, moving or adding a structure in a county-administered area1.
Building a home in St. Louis County: steps in order
- Ask Planning & Zoning whether the parcel is county-administered and identify the zoning authority and district29.
- Confirm who administers the Minnesota State Building Code for the parcel, because St. Louis County itself does not1.
- Apply online for the county land-use permit before building, moving or adding to a structure in a county-administered area81.
- Arrange the septic design, county permit and required inspection with the Onsite Wastewater Division314.
- Check floodplain, wetland and shoreland constraints before grading or placing fill1112.
- Obtain a permit from the road authority for a new or additional access to a public highway19.
What should you check before buying land in St. Louis County?
Start with jurisdiction: confirm whether St. Louis County, a township or a city administers zoning for the parcel2. Then verify legal access, because an additional driveway onto a public highway is subject to a permit from the road authority19. Test septic feasibility early: only about 1.2% of mapped soils lack severe conventional-drain-field limitations15. The landscape is about 77.6% wooded, while about 93.4% is at a slope of 15% or less, making clearing, access and site-specific wet areas important budget questions2021. Check mapped floodplain status before building, filling or installing a culvert12. For carrying costs, the county's median property-tax bill is about $2,142 per year and the effective property-tax rate is about 1%2223. Private-well permitting and general utility-connection rules remain unconfirmed in the reviewed sources5.
Watch-outs
- A St. Louis County land-use permit is not a Minnesota State Building Code permit; the county says it does not administer that code1.
- Cities and townships may administer their own zoning, so county-administered rules should not be assumed to govern every parcel2.
- RV living, tiny-home occupancy, general setbacks, minimum home size and private-well permitting remain unconfirmed; ask the parcel's zoning authority and the Land Use Division before relying on a planned use27.
Sources
- Apply for a Land Use Permit, quoted and re-checked
- Comprehensive Land Use Plan & Ordinances (2026 county census)
- Onsite Wastewater (Septic Systems), quoted and re-checked
- Sec. 326B.805 MN Statutes (Minnesota statewide rule), quoted and re-checked
- Onsite Wastewater (Septic Systems) (2026 county census)
- 2025 Minnesota Statutes, section 326B.121 (Minnesota statewide rule), quoted and re-checked
- St. Louis County Land Use Division (stlouiscountymn.gov)
- Apply for a Land Use Permit, quoted and re-checked
- St. Louis County Planning & Zoning – Duluth Office (stlouiscountymn.gov)
- Comprehensive Land Use Plan & Ordinances, quoted and re-checked
- St. Louis County Land Use Division (stlouiscountymn.gov)
- Floodplain Regulations (Minnesota statewide rule), quoted and re-checked
- St. Louis County Onsite Wastewater Division (stlouiscountymn.gov)
- 67 | St. Louis County Local Standards, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Minnesota Administrative Rules, part 7080.2450 Maintenance (Minnesota statewide rule), quoted and re-checked
- 2025 Minnesota Statutes, Chapter 327 (Minnesota statewide rule), quoted and re-checked
- Manufactured home information (Minnesota statewide rule), quoted and re-checked
- Minnesota Statutes, section 160.18: Access to roads; approaches (Minnesota statewide rule), quoted and re-checked
- Wooded share of land: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Effective property tax rate: 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.