Illinois, DuPage County Roofing Permit Regulations and County Ordinances for Unincorporated Areas
Roofing Permit Requirements in Unincorporated DuPage County
In unincorporated areas of DuPage County, building permits are managed by the DuPage County Building & Zoning Department. A building permit is specifically required for roofing projects that involve a tear-off of existing roofing materials. If the project consists only of an overlay of new roofing material over existing material (limited to a maximum of two overlays, totaling three roofs), a permit is typically not required.
Permit Process and Requirements
For projects requiring a permit, the application process is conducted through the County's online permit portal, Accela Citizen Access. Before beginning work, contractors must be registered with the DuPage County Building Division. Additionally, property owners or contractors must ensure all necessary documentation, such as trust disclosures (if applicable) and any required entrance permits or performance bonds, are addressed prior to permit issuance. Work must not commence until the permit has been officially issued by the County.
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Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Illinois, including Dupage 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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