Sherman Buildings serves customers on both sides of the Minnesota-Wisconsin border, and one of the most common questions we hear from landowners building near the St. Croix River corridor is: how different is the permit process in Wisconsin compared to Minnesota? The short answer is that both states have comprehensive building code frameworks, both have agricultural exemptions with real conditions attached, and both require you to navigate layered authority between state and local jurisdictions. The details, however, differ enough that understanding both systems separately—and knowing where they converge—is worth your time before you build.
Minnesota's Framework: DLI and the State Building Code
In Minnesota, the Department of Labor and Industry (DLI) administers the Minnesota State Building Code (MSBC), which under Minn. Stat. § 326B.121 is the statewide minimum construction standard and supersedes any municipal building code. The MSBC incorporates and amends editions of the International Building Code (IBC) and International Residential Code (IRC). The current adopted edition is based on the 2020 Minnesota State Building Codes. Local municipalities may enforce the code but cannot adopt stricter structural code provisions on their own.
The authority having jurisdiction (AHJ) in Minnesota can be the county, the township, or the city. Some areas have the county issue permits; in other townships, the township board is the AHJ. State code applies statewide, but it is not uniformly enforced in every jurisdiction—some rural townships have no local inspector and rely on state or contracted officials. The practical effect is that permit requirements, application processes, and inspection procedures vary by location.
Minnesota Agricultural Exemption
Under Minnesota Rules 1300.0030, subpart 2A, the State Building Code does not apply to buildings that meet Minnesota's definition of an agricultural building under Minn. Stat. § 326B.103: a structure on agricultural land (as classified by the assessor), designed and used to house farm implements, livestock, or agricultural products, and used only by the owner, lessee, their families, employees, and persons picking up or delivering agricultural products. Exceptions for floodplain, electrical inspection, and skylight requirements still apply. Local zoning ordinances remain in force even when the building code exemption applies.
Wisconsin's Framework: DSPS, the UDC, and the Commercial Building Code
Wisconsin's building code authority rests with the Department of Safety and Professional Services (DSPS). Wisconsin operates two distinct building code frameworks depending on the structure type. The Uniform Dwelling Code (UDC) (Wisconsin Administrative Code SPS 320–325) is the statewide building code for one- and two-family dwellings built since June 1, 1980, and is enforced in all Wisconsin municipalities. The Commercial Building Code (SPS 361–366) governs non-residential and multi-unit construction. Most pole barns that are not primary dwellings fall under local authority and the commercial or UDC framework depending on their use, not under a single unified code as in Minnesota.
Wisconsin updated its Commercial Building Code to adopt the 2021 ICC effective September 1, 2025, with plan compliance required for plans submitted on or after November 1, 2025. This is a notable distinction from Minnesota, which adopted the 2020 code editions. Both states follow model codes based on the IBC/IRC family, but their local amendments, snow load standards, and enforcement structures differ.
Local Permitting Authority in Wisconsin
Wisconsin uses a layered local authority structure that is in some ways more complex than Minnesota's. For most structures in Wisconsin, you typically need both a county or town land use permit (zoning approval) and a building permit issued by the municipality or its contracted building inspector. In St. Croix County, for example, each town contracts its own building inspector who issues building permits, while the county handles zoning and land use. In Washburn County, the UDC inspector is a state-contracted inspector, and the county zoning department issues land use permits separately.
In shoreland areas of Wisconsin, county shoreland permits layer on top of local zoning and building permits—similar to Minnesota's DNR shoreland framework but administered at the county level. Properties within the Polk County shoreland district, for example, require a separate Polk County land use permit in addition to any town-level permits.
Wisconsin Agricultural Building Exemption
Wisconsin's agricultural exemption is found in Wisconsin Administrative Code SPS 361.02(3)(e): buildings and structures that are on a farm premises and used exclusively for farming purposes are exempt from the Wisconsin Commercial Building Code. DSPS guidance uses a "90 percent" test—the building must be used for storage, processing, or handling of farm products substantially (at least 90 percent) raised by the building owner on their own property. Public horse boarding stables and riding arenas explicitly do not qualify. As in Minnesota, zoning ordinances still apply to exempt agricultural buildings.
One practical difference: Wisconsin's exemption is framed around the Commercial Building Code. A pole barn on a Wisconsin farm that qualifies under SPS 361.02(3)(e) escapes the commercial code review process, but the property owner may still need a county land use (zoning) permit and must comply with local zoning setbacks. Electrical work requires a separate permit and inspection in both states.
Key Practical Differences: Minnesota vs. Wisconsin
Code Authority and Structure
Minnesota has one statewide building code (the MSBC administered by DLI) that supersedes local codes and applies to virtually all structures except qualified agricultural buildings and certain exempt small structures. Wisconsin maintains parallel frameworks: the UDC for one- and two-family dwellings and the Commercial Building Code for larger and non-residential structures, both administered by DSPS but enforced locally. The split creates slightly different pathways depending on what you are building and where.
Local Enforcement
In Minnesota, the AHJ for building permits is typically the county or a township that has adopted the State Building Code. If a township has not adopted the code, the state can step in. In Wisconsin, towns typically contract their own building inspector, and it is common to need a building permit from the town as well as a separate land use permit from the county zoning office—and, in shoreland areas, a third permit from the county as well. This multi-permit process is more pronounced in many NW Wisconsin counties than in a typical Minnesota county.
Agricultural Exemption Scope
Both states have a bona fide agricultural building exemption, and both require that the building be on actively farmed land and used exclusively for agricultural purposes. Minnesota's exemption is codified in the State Building Code rules and defined by statute at § 326B.103. Wisconsin's is in the Commercial Building Code at SPS 361.02(3)(e) with the 90 percent farm-origin test. In practice, genuinely agricultural structures on working farms in either state may build without a full building permit, but a zoning or land use permit is almost always still required, and both states require electrical permits regardless.
Snow Loads
Minnesota specifies design ground snow loads explicitly by county in state code: 60 psf for a broad band of northern and central counties, 50 psf for the south. Wisconsin does not have a comparable statewide county-specific table in its building code the same way Minnesota does; engineers in Wisconsin reference ASCE 7 maps and the ASCE Hazard Tool for site-specific values. Northwestern Wisconsin counties that Sherman Buildings serves (Polk, Burnett, Washburn, Barron, Douglas, St. Croix, Rusk, Sawyer) generally fall in the range of 40–60 psf ground snow load depending on exact location, with northern counties trending higher. Always confirm with the local AHJ and your structural engineer.
Northwest Wisconsin: Where Sherman Buildings Works
Sherman Buildings' Wisconsin service area runs along the Minnesota border and the St. Croix River corridor. Our primary Wisconsin counties include Polk, Burnett, Barron, Washburn, Douglas, northern St. Croix, Rusk, and western Sawyer counties. Here is how permitting authority works in several of those counties:
Polk County
Polk County uses a layered system: the county issues land use permits and administers shoreland zoning, while individual towns contract their own building inspectors for building permits. If your property is in a town within Polk County's shoreland district, you may need a Polk County land use permit in addition to the town land use permit and building permit. The Town of St. Croix Falls, for example, requires both a town land use permit and a separate building permit from the town's contracted inspector.
Burnett County
Burnett County's zoning department handles land use permits and zoning approvals. As in other Wisconsin counties, permit applications and fee information are available through the county's zoning department, and building permits are handled at the town level. Confirm the specific requirements with both the county zoning office and your town before beginning a project.
Washburn County
Washburn County Zoning requires a land use permit before any structure is erected, placed, moved, or expanded—including farm structures and accessory buildings larger than 64 square feet. The county's zoning page notes that the UDC inspector (a state-contracted inspector) issues the building permit. The land use permit application requires a plot plan showing existing and proposed structures, distances to roads, property lines, and any navigable water bodies. UDC inspections must occur before digging or construction begins.
St. Croix County
St. Croix County has its own land use and zoning process, with the county handling land use permits and each town contracting its own building inspector. The county's zoning ordinance establishes setbacks that vary by zoning district and overlay (shoreland, floodplain, St. Croix Riverway). A pre-application meeting with the county's land use team is strongly recommended before submitting any permit application in St. Croix County.
Practical Guidance for Border-Area Landowners
If you are building near the Minnesota-Wisconsin border, the most important early step is the same in either state: identify the correct permitting authority for your specific parcel. Do not assume the county handles everything—in both states, towns and townships can have significant independent authority. Key questions to ask:
- What is my property's zoning district, and what uses and structure sizes are permitted by right?
- Who issues the building permit—the county, the town, or a contracted inspector?
- Is a separate land use or zoning permit required in addition to the building permit?
- Is my property within a shoreland, floodplain, or riverway overlay that adds another permitting layer?
- Does my project qualify for an agricultural building exemption, and what documentation does the county require to claim it?
Sherman Buildings works regularly in both Minnesota and northwestern Wisconsin and is familiar with the permit processes in our primary service counties on both sides of the border. We provide engineered building packages that meet both states' code requirements, and our team can help you identify what documentation your specific AHJ will need. Contact us to discuss your project—the earlier you start the permit conversation, the smoother the process goes.
Frequently Asked Questions
Is it harder to get a pole barn permit in Wisconsin than in Minnesota?
Not necessarily harder, but the process is often more layered. Wisconsin commonly requires a county land use permit, a town building permit, and sometimes a shoreland permit—three separate applications. Minnesota may consolidate more of that through a single county or township AHJ. Both processes are manageable with good preparation.
Do I need an engineer-stamped plan in Wisconsin for a pole barn?
It depends on the size, use, and jurisdiction. Many Wisconsin municipalities require engineered drawings for structures above certain square footage thresholds or for commercial-type occupancies. Sherman Buildings provides engineered plans as part of our standard project package for both states.
Can Sherman Buildings pull permits in Wisconsin?
We can guide you through the process and provide the required engineering documentation. Permits are typically applied for in the property owner's name, but we help coordinate the paperwork and know what each county's local process typically requires based on our experience in Polk, Burnett, Washburn, Barron, Douglas, and St. Croix counties.
