Illinois, Grundy County Roofing Permit Regulations and County Ordinances for Unincorporated Areas
Grundy County Building & Safety Jurisdiction
In Grundy County, Illinois, the Land Use Department is responsible for overseeing building, planning, and zoning regulations. The Building Office specifically manages the permitting process to promote public health, safety, and general welfare. This department enforces the 2021 International Code Council (I.C.C.) building series of codes and the 2020 National Electric Code (NEC) for construction projects within its jurisdiction.
Roofing Permit Requirements for Unincorporated Areas
Properties located in unincorporated areas of Grundy County (areas not within a city or village) are subject to the regulations of the Grundy County Land Use Department. A specific "Roof Permit" is listed among the building permits and applications managed by the county. According to the county's fee schedule, there is a specific fee associated with the replacement of roof shingles. It is essential for property owners to contact the Building Office to confirm the exact scope of work that requires a permit, as requirements can vary based on the extent of the project.
Furthermore, all contractors performing work in the county, including roofing contractors, must be properly licensed with the Grundy County Land Use Department. Before a permit is issued, the department verifies that the contractor is appropriately licensed. Homeowners should ensure their chosen contractor complies with these licensing requirements and that all necessary permits are obtained before construction begins.
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Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Illinois, including Grundy County.
Illinois Roofing Legislation, Codes, and Guidelines
State-Level Building Codes and Legislation for Roofing in Illinois
As of January 1, 2025, Illinois has implemented a statewide baseline building code requirement pursuant to Public Act 103-0510, which amended the Capital Development Board Act. This legislation mandates that all municipalities and counties in Illinois must adopt and enforce building codes that meet or exceed the minimum structural requirements of the International Code Council (ICC) standards, specifically the International Building Code (IBC) and the International Residential Code (IRC). Prior to this, Illinois did not have a unified statewide building code, and regulations were determined entirely at the local municipal or county level.
While the state now requires a baseline, local jurisdictions retain the authority to adopt their own specific editions (such as the 2018, 2021, or 2024 editions) and implement local amendments, provided those amendments do not reduce the structural requirements below the state-mandated baseline. Consequently, specific roofing requirements—such as those for ice and water shields, ventilation, and shingle layering—can still vary significantly between different cities, villages, and counties. Property owners and contractors must consult their local Authority Having Jurisdiction (AHJ) to confirm the specific code edition and local amendments applicable to their project.
Primary State Agency
The Illinois Capital Development Board (CDB) is the primary state agency responsible for the administration of the state's building code framework. Under the Capital Development Board Act (20 ILCS 3105), the CDB is tasked with identifying and publishing local building codes and ensuring that municipalities and counties comply with the requirement to report their adopted codes and amendments to the state.
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