Wisconsin, Crawford County HVAC Permit Regulations and County Ordinances for Unincorporated Areas

Crawford County Building and Safety Jurisdiction

Crawford County does not have a centralized county-wide building and safety division that issues HVAC permits for all properties. Instead, building permit authority, including for HVAC systems, is decentralized and managed at the local municipal level (towns, villages, and cities). The county government itself primarily handles specific land-use regulations, such as sanitary permits for private onsite wastewater treatment systems (POWTS) and zoning ordinances related to floodplains and shoreland-wetland areas.

Rules for Properties in Unincorporated Areas

For properties located in unincorporated areas of Crawford County, building permits—including those for HVAC work—must be obtained from the specific town's designated Uniform Dwelling Code (UDC) building inspector. Because the county does not issue these permits, property owners must contact their local town clerk to identify the correct building inspector for their jurisdiction and to understand the specific permit application process, fees, and inspection requirements for their project.

Resources to Learn More

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

Wisconsin Hvac Legislation, Codes, and Guidelines

State Statutes and Codes Adopted

Wisconsin utilizes a hybrid approach to building codes, maintaining its own administrative code chapters that incorporate and amend national model codes. As of October 1, 2025, Wisconsin transitioned to the 2021 editions of the International Code Council (ICC) suite for commercial and multi-family residential buildings, with specific state-level amendments known as "Wisconsinisms."

Commercial and Multi-Family Buildings: These are governed by the Wisconsin Commercial Building Code, found in Chapters SPS 361–366 of the Wisconsin Administrative Code. Chapter SPS 364 specifically addresses heating, ventilating, and air conditioning (HVAC) systems by adopting the International Mechanical Code (IMC) with Wisconsin-specific modifications.
One- and Two-Family Dwellings: These are regulated under the Wisconsin Uniform Dwelling Code (UDC), found in Chapters SPS 320–325. HVAC requirements for these dwellings are specifically detailed in Chapter SPS 323.

Primary State Agencies

The primary agency responsible for the development, adoption, and oversight of building, fire safety, and energy efficiency codes in Wisconsin is the Department of Safety and Professional Services (DSPS). Within the DSPS, the Division of Industry Services (DIS) manages the programs for commercial buildings and one- and two-family dwellings, coordinating with local certified municipalities that handle plan reviews and inspections.

Resources to Learn More

Select a City in Crawford 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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