Wisconsin, St. Croix County Remodeler Permit Regulations and County Ordinances for Unincorporated Areas

St. Croix County Building and Safety Division

The St. Croix County Community Development Department, specifically its Land Use and Zoning division, acts as the Authority Having Jurisdiction (AHJ) for land use and zoning matters within the county. For building permits and inspections, the county often contracts with third-party inspection agencies, such as All Croix Inspections or Brian Wert Inspection Agency, depending on the specific municipality or township. It is crucial to identify the correct municipality for your property to determine the exact AHJ for building permits.

Rules for Properties in Unincorporated Areas

St. Croix County's general zoning ordinances apply to all towns and unincorporated areas, with exceptions for the towns of Forest, Hudson, St. Joseph, and Troy. Overlay districts, such as Shoreland, Floodplain, and the Lower St. Croix Riverway, apply to all townships. For specific regulations within unincorporated areas, it is essential to consult the St. Croix County Code of Ordinances, particularly Chapter 15 (Zoning) and related overlay district chapters.

Permit Triggers for Demolition Work During a Remodel

Demolition work during a remodel generally requires a demolition permit. This permit ensures compliance with local building codes and zoning laws. Key requirements often include obtaining utility clearances, conducting asbestos inspections if the building predates the 1980s, and potentially environmental inspections. Prior to issuing a demolition permit, proof of utility disconnections (water, electric, gas, sewer) is typically required, and sewer and water connections must be sealed. Erosion and sediment control permits may also be necessary if the demolition results in significant soil disturbance or fill placement.

Permit Requirements for Altering Non-Living Spaces

Converting non-living spaces such as garages, attics, or unfinished basements into habitable living areas typically requires a building permit. This is because such conversions often change the occupancy, area, structural strength, fire protection, exits, light, or ventilation of the dwelling. Specific requirements may include:

Garages: Walls and ceilings separating an attached garage from the dwelling must meet specific fire-resistive construction standards.
Attics: If an attic is converted into living space, it must meet building codes related to access, fire separation, and draft stopping. Attics with a certain square footage and clear height require specific access openings.
Unfinished Basements: Transforming an unfinished basement into living space changes the square footage use and necessitates compliance with building codes, ventilation rules, and safety equipment standards.

In general, any project that alters the structure, safety, utilities, or square footage use of a property will likely require a permit. It is always recommended to contact the local building department or inspection agency to confirm specific requirements for your project.

Resources to Learn More

Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Wisconsin, including St. Croix County.

Wisconsin Remodeler Legislation, Codes, and Guidelines

Wisconsin State Building Codes and Legislation for Remodelers and Residential Renovations

Wisconsin's building codes for remodelers and residential renovations are primarily governed by the Department of Safety and Professional Services (DSPS). The state adopts and modifies model codes from the International Code Council (ICC) to create its own administrative codes.

1. Specific State Statutes and Codes Adopted

For one- and two-family dwellings, the Uniform Dwelling Code (UDC), found in Wisconsin Administrative Code chapters SPS 320-325, applies. This code sets minimum standards for fire safety, structural strength, energy conservation, and general health and safety. The UDC is based on model codes but includes Wisconsin-specific adjustments.
For commercial and multi-family residential buildings, Wisconsin is transitioning to the 2021 International Building Code (IBC) standards, with additional state-specific adjustments. This updated code will take effect on September 1, 2025, and will be found in Wisconsin Administrative Code chapters SPS 361-366. Previously, the state used the 2015 editions of the model codes.
The International Existing Building Code (IEBC) is adopted and modified within Chapter SPS 366 of the Wisconsin Administrative Code, which covers the repair, alteration, change of occupancy, addition, or relocation of existing buildings.

2. Primary State Board or Agencies

The Department of Safety and Professional Services (DSPS) is the primary state agency responsible for setting and enforcing building codes and standards in Wisconsin.
Local municipalities also play a role in enforcing the UDC and may have their own specific permit requirements.

3. Classification of Remodels and Demolition Guidelines

Cosmetic vs. Structural Alterations: The UDC covers alterations to one- and two-family dwellings. While inspectors focus on code compliance, "cosmetic or non-code workmanship items will not normally be ordered corrected." However, deviations from approved plans may require revised submittals. The Wisconsin Home Improvement Practices Act (HIPA), found in Chapter ATCP 110 of the Administrative Code, defines "home improvement" broadly to include remodeling, altering, repairing, painting, or modernizing residential property, including additions. The definition of "remodel" in Wis. Stat. § 101.148 specifically means to alter or reconstruct a dwelling, and does not include maintenance or repair work.
When Demolition Guidelines Apply: Demolition activities require a demolition permit, which ensures compliance with local building codes and zoning laws. Specific requirements may include asbestos inspections for buildings constructed before the 1980s, utility clearances, and environmental inspections. In some municipalities, like Milwaukee, there are specific deconstruction ordinances for older structures to maximize salvageable materials. For demolition permits, all utility connections must be sealed and plugged, and a permit for boarding is not required if a demolition permit is obtained.

Resources to Learn More

Select a City in St. Croix County

If your project is located within incorporated city limits, you will likely need to follow municipal ordinances rather than county rules. Select your city below to view local regulations.

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