Jersey County, Illinois Roofing Permit Regulations and County Ordinances for Unincorporated Areas
Jersey County Building & Safety Division
The Jersey County Code Administrator's Office is responsible for building and safety regulations in unincorporated areas of Jersey County. This office oversees the application and plan review process for new construction and structural alterations, issues building permits, and performs necessary inspections to ensure compliance with adopted building codes, including the 2018 International Residential Code and the 2018 International Building Code.
Roofing Permit Requirements in Unincorporated Areas
In unincorporated Jersey County, a building permit is required for reroofing projects. When applying for a permit, you must provide the license number of the roofing contractor performing the work. All roofing contractors must be properly licensed by the State of Illinois (IDFPR). While minor repairs using like-for-like materials or routine maintenance that does not affect structural integrity may be exempt, it is strongly recommended to contact the Code Administrator's Office to confirm whether your specific project requires a permit before beginning work.
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Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Illinois, including Jersey 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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