The Roofing Book

Home / Roofing by City / Decatur, Illinois

Roofing in Decatur, Illinois

Yes, a permit is required to replace a roof in Decatur, IL, issued by City of Decatur Building Inspections Division. This hub aggregates roofing permit and contractor-registration requirements for Decatur, Illinois, along with sourced roofing material references — every fact linked to its directory record.

Roofing permits & building code in Decatur

Roofing permit and contractor-licensing rules in Decatur are set locally by City of Decatur Building Inspections Division. Illinois licenses roofing contractors at the state level: under the Roofing Industry Licensing Act (225 ILCS 335) no roofing work may be done except by a state-licensed roofing contractor or qualifying party, with a limited license for residential properties of 8 units or less and an unlimited license for everything else, and a city or county that requires a building permit may not issue one to a roofing contractor without proof of current state licensure, while some cities add their own contractor registration on top — always confirm the current requirements with the authority before starting work.

Roofing permit
Required
Contractor registration
Required
Adopted building code
The City's own codified Chapter 67.2, Residential Building Code (read in full, all 18 numbered sections), adopts the 2021 International Residential Code by reference, "the same being found and declared by the Council to be regulations as defined by applicable statute," as amended by Ordinance 2023-94 (December 18, 2023, effective January 1, 2024) and Ordinance 2018-65 (November 5, 2018, effective January 1, 2019). The Chapter deletes R103.2, R105.2 Building item #2, R112, and R302.1 Exceptions 2, 3 and 4; amends R105.2 Building item #1 (accessory-structure exemption reduced from 200 to 120 square feet), R105.5, Table R301.2, and R313.2 (residential sprinkler requirement changed from "shall" to "may"); and adopts a named list of IRC appendices. None of the deletions or amendments touches Chapter 8 (roof-ceiling construction) or Chapter 9 (roof assemblies), so those chapters apply as published in the base 2021 IRC.
Registration details
  • state_level: Illinois licenses roofing contractors statewide with no dollar threshold. 225 ILCS 335/9(2): "No work involving the construction, reconstruction, alteration, maintenance, or repair of any kind of roofing or waterproofing may be done except by a roofing contractor or a qualifying party licensed or credentialed under this Act." 225 ILCS 335/5(a-3): a municipality or county that requires a building permit may not issue one to a roofing contractor without proof of current state licensure. The licence is held by the business entity, requires a continuous surety bond ($10,000 limited / $25,000 unlimited), liability and workers' compensation insurance, and a passed exam (225 ILCS 335/3(2)). The Act's exemptions (own-property work, no-consideration work, an owner's employee, greenhouses, farm buildings) are facts about the work and the relationship, not a trade-category carve out for roofing, so they do not affect an ordinary paid residential reroof. The Act is scheduled to sunset January 1, 2031, a recurring legislative renewal date, not an expiry of current effect.
  • city_level: NOT ESTABLISHED THIS SESSION. Decatur's Chapter 67.2 (read in full) requires a building permit and conditions permit issuance on compliance with the Code, but does not itself state a separate City roofing-contractor registration or licence beyond the State credential; no City-specific contractor registration page was located this session.

View the full Decatur permitting authority record →

Roofing suppliers in Decatur

2 roofing distributor branches serving Decatur are cataloged in the directory:

Roofing suppliers in Decatur

ABC Supply Co., Inc.ABC Supply - Decatur, IL Richards Building Supply Co.Richards Building Supply - Decatur, IL

All roofing suppliers in Decatur →

Roofing materials for Decatur

Compare roofing material families — service life, weight, cost band, and durability — for a Decatur reroof. Every material entry in the directory carries a cited, dated source.

Start with all roofing materials or the asphalt vs. metal vs. tile comparison.

Local permitting authority

City of Decatur Building Inspections Divisioncity

Roofing guides

Class 4 Impact-Resistant ShinglesGuide Asphalt vs. Metal vs. TileGuide Wind & Fire RatingsGuide

Sources