Unincorporated Cook County, Minnesota requires a land-use permit for any habitable structure and for other structures larger than 160 square feet in county-administered areas1. Cook County Land Services handles zoning except in Grand Marais and the Grand Portage Reservation2. Grand Marais issues its own building permits; Land Services administers septic requirements outside the Grand Portage Reservation, including inside Grand Marais34.
At a glance
- Building / land-use permit
- Required for every habitable structure and structures over 160 square feet in county-administered areas1
- Zoning
- County-administered except in Grand Marais and the Grand Portage Reservation5
- Septic permit
- Land Services handles septic permits outside the Grand Portage Reservation, including Grand Marais46
- RV living
- Limited to a short-duration permit bridging purchase and construction of a permanent residence7
- Tiny home
- A land-use permit is required regardless of size; local occupancy approval remains parcel-specific1
- Owner-builder
- Available for qualifying owners who will occupy the home or retain it as a rental8
- Private well
- State well notification is required before construction; no separate county well permit was confirmed94
- Minimum lot size
- Varies by district; most county land is zoned 5, 10 or 20 acres, with some 1 to 2 acre lots10
Who to call
Planning & zoning
Land-use and zoning administration, septic-system administration, stormwater and wetland permitting inquiries
Cook County Courthouse 411 West 2nd Street Grand Marais, MN 55604
Contact details are copied from each office’s official page and were checked against it on October 11, 2026.
Off-grid gear
Going off-grid in Cook County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in Cook County, Minnesota?
Cook County Land Services requires a land-use permit for any habitable structure, regardless of size, and for other structures larger than 160 square feet in county-administered areas.1 Changes to an existing structure’s exterior dimensions generally require a land-use permit too.1 An accessory structure under 160 square feet or an unsided woodshed may be exempt if required setbacks are met; a small habitable cabin still needs a land-use permit.1
Inside Grand Marais, the city issues building permits for construction, alteration, wrecking or moving a structure, with an exception for residential interior work that changes neither exterior dimensions nor use and occupancy.3 Land Services still administers septic requirements in Grand Marais, but not within the Grand Portage Reservation.4
Minnesota’s State Building Code applies statewide to the construction it governs, but local administration and enforcement depend on jurisdiction.11 We could not confirm the code-inspection authority or schedule for each Cook County location; ask Land Services which building-code approvals apply to the parcel.4
Who issues building permits in Cook County, and how do you reach them?
Cook County Land Services handles rural land-use permits, zoning approval, septic administration, stormwater permitting and subdivision questions in its jurisdiction.4 Contact Land Services at 218.387.3630 or at the Cook County Courthouse, 411 West 2nd Street, Grand Marais, MN 55604.4
For building permits inside Grand Marais, apply to the city’s Zoning Administrator on city forms with a scaled plan showing lot dimensions and building locations.3 Septic administration stays with Land Services outside the Grand Portage Reservation.4
For county applications, create an account in the Cook County e-permitting portal, submit applications and supporting drawings or photographs, pay applicable fees and track communications, completed permits and renewals.12 A county fee schedule is published; ask Land Services for the current land-use permit charge.13 We could not confirm a countywide certificate-of-occupancy requirement; ask Land Services which building official governs the proposed work.4
Does Cook County have zoning?
Cook County Land Services administers zoning on unincorporated land outside the Grand Portage Reservation; the City of Grand Marais and the reservation are outside county zoning authority.14 Grand Marais has its own zoning ordinance covering city land and buildings, while septic administration remains with Land Services outside the reservation.154
Cook County publishes a zoning-and-land-use map and Zoning Ordinance Number 37; ask Land Services to identify the parcel’s district before choosing a house site or use.16 Minimum lot size varies by district: most county land has minimums of 5, 10 or 20 acres, with some districts allowing lots as small as 1 or 2 acres.10 A residential lot must also have an accessible, buildable homesite meeting minimum setbacks, and a variance procedure may apply when those setbacks cannot be met.17 We could not confirm district-specific numeric setbacks, minimum dwelling size, lot coverage or height limits; ask Land Services for the standards applicable to the parcel.4 Rezoning is a non-administrative change of district rather than a routine land-use permit.18
How do septic permits work in Cook County?
Cook County Land Services administers septic requirements throughout Cook County except within the Grand Portage Reservation, including inside Grand Marais.4 Cook County requires a septic permit for all types of septic solutions serving inhabited property; we could not confirm ordinance exemptions, so ask Land Services before relying on one.6 Installing, replacing, altering, repairing or extending a subsurface sewage system requires a permit.4 Property owners may complete applications for portable, composting or incineration toilets, but those sanitation systems still require approval; the listed privy/compost permit fee is $200.19
Only about 0.4% of mapped Cook County soils are rated without severe limits for a conventional drain field, so evaluate septic feasibility before fixing the house site.20 New or replacement systems require an inspection, and bedroom-addition approvals can depend on inspection and compliance documentation for the existing system.21 We could not confirm a universal Cook County septic-inspection rule for property sales; ask Land Services what the transaction triggers.4
Can you live in an RV or tiny home on your land in Cook County?
Cook County's recreational-vehicle permit is short-duration and intended to bridge the time between buying property and constructing a permanent residence; it does not establish a right to live indefinitely in an RV.7 Ask Land Services about the parcel's zoning, permit duration and sanitation requirements because a broader private-property camping rule could not be confirmed.4
A tiny home does not avoid county permitting because it is small: every habitable structure in county-administered areas requires a land-use permit regardless of size.1 Minnesota treats a tiny house of 400 square feet or less, excluding lofts, as subject to the statewide construction code and local zoning.22 We could not confirm a countywide minimum dwelling size or a Cook County rule specifically approving tiny-home occupancy; ask Land Services for a parcel-specific determination.4
Building a home in Cook County: what are the steps?
- Confirm the parcel’s zoning authority: Cook County Land Services, Grand Marais or the Grand Portage Reservation.2
- Ask the zoning authority for the district, permitted use, lot-size minimum and setbacks before choosing a building site.161017
- Evaluate septic feasibility and ask Land Services what design and application documents the proposed system needs outside the reservation.204
- Submit county land-use and septic applications through the county portal; inside Grand Marais, submit the city building-permit application to the city’s Zoning Administrator.123
- Ask Land Services which building official handles code inspections and occupancy approval for the parcel.4
- For a county-road driveway, apply for the county entrance permit: $50 plus a $250 deposit; a grade-and-fill permit may also be required.23 The entrance application does not cover Forest Service, DNR or private roads.23
- Before constructing or modifying a direct state-highway driveway, obtain a MnDOT Access Driveway Permit.24
What should you check before buying land in Cook County?
Begin with jurisdiction and buildability. Confirm the zoning authority, district, allowed use, lot dimensions, setbacks, legal access and whether the project needs land-use, septic, stormwater, wetland or floodplain approval.5164 Building a house in a mapped floodplain requires a floodplain permit, and in unincorporated areas the county zoning authority generally administers it25. Splitting or adjusting the boundaries of land is regulated, and the county provides processes for administrative subdivisions and boundary-line adjustments.26 Cook County’s vacation-rental license application lists a $600 fee, and rentals of less than 30 consecutive days are subject to Cook County lodging tax.27 We could not confirm every rental occupancy or operating limit; ask Land Services before budgeting rental income.4
Budget for site work after a septic evaluation: about 0.4% of mapped soils avoid a severe conventional-drain-field limitation, while about 82.8% of the county has slopes of 15% or less.2028 Minnesota generally requires a well notification filed with the state before a water-supply well is built9. We could not confirm a countywide water or sewer connection rule; ask Land Services which office governs the parcel.4 Cook County's effective property-tax rate is about 0.8%, with a median annual bill of about $2,322.2930
Watch-outs
- Grand Marais issues city building permits and sets city zoning, but Land Services still administers septic requirements there; the Grand Portage Reservation is outside county zoning and septic administration.3154
- A small habitable cabin still requires a land-use permit even when it is under 160 square feet.1
- Cook County's RV permit is short-duration and does not authorize indefinite RV residence.31
- The owner-builder exemption applies to contractor licensing, not Cook County land-use or building-code approvals.8
Sources
- Permits, quoted and re-checked
- Planning & Zoning, quoted and re-checked
- Grand Marais: Grand Marais Zoning Ordinance (Cook County), quoted and re-checked
- Cook County Land Services (cookcountymn.gov)
- Planning and Zoning, quoted and re-checked
- Permits, quoted and re-checked
- Permits, quoted and re-checked
- revisor.mn.gov, quoted and re-checked
- 2025 Minnesota Statutes, section 103I.205: Well Construction (Minnesota statewide rule), quoted and re-checked
- Cook County Property Owners Resource Guide, quoted and re-checked
- 2025 Minnesota Statutes, section 326B.121 (Minnesota statewide rule), quoted and re-checked
- Permits, quoted and re-checked
- Permits, quoted and re-checked
- Planning and Zoning, quoted and re-checked
- Grand Marais: Grand Marais Zoning Ordinance (Cook County), quoted and re-checked
- Planning and Zoning, quoted and re-checked
- Cook County Property Owners Resource Guide, quoted and re-checked
- Planning & Zoning, quoted and re-checked
- e-Permitting - Cook County, Minnesota, quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- revisor.mn.gov, quoted and re-checked
- Tiny Houses and the 2020 Minnesota Residential Code (Minnesota statewide rule), quoted and re-checked
- e-Permitting - Cook County, Minnesota, quoted and re-checked
- MnDOT Access Management Manual, Chapter 4 (Minnesota statewide rule), quoted and re-checked
- Floodplain Regulations (Minnesota statewide rule), quoted and re-checked
- cookcountymn.gov, quoted and re-checked
- e-Permitting - Cook County, Minnesota, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Permits, quoted and re-checked
Written October 11, 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.