Adopted Building Codes

This page is a listing of the codes that are enforced by DeKalb County, effective July 1, 2019.

RESIDENTIAL

• 2021 International Residential Code*
  • Code: https://codes.iccsafe.org/content/IRC2021V3.0
  • Adoption Ordinance*: https://dekalbcounty.org/wp-content/uploads/2024/11/ord-2024-011.pdf
    – 2021 International Mechanical Code
    – 2021 International Fuel Gas Code
    – 2020 National Electrical Code
    – 2021 International Swimming Pool & Spa Code
• 2014 Illinois State Plumbing Code (by IL State Plumbing Inspector)
  Code: https://www.ilga.gov/agencies/JCAR/Sections?PartID=07700890&TitleDescription=TITLE%2077:%20%20PUBLIC%20HEALTH
• 2021 IECC – Illinois State Energy Conservation Code*
  Code: https://www.ilga.gov/agencies/JCAR/Sections?PartID=07100600&TitleDescription=TITLE%2071:%20%20PUBLIC%20BUILDINGS,%20FACILITIES%20AND%20REAL%20PROPERTY
• DeKalb County Code

*NOTE: Amended

COMMERCIAL OR INDUSTRIAL

• 2021 International Building Code*
  • Code: https://codes.iccsafe.org/content/IBC2021V2.0
  • Adoption Ordinance:https://dekalbcounty.org/wp-content/uploads/2024/11/ord-2024-011.pdf
    – 2021 International Fire Code
    – 2020 National Electrical Code
    – 2021 International Mechanical Code
    – 2021 International Fuel Gas Code
    – 2021 International Existing Building Code
• 2014 Illinois State Plumbing Code (by IL State Plumbing Inspector)
  Code: https://www.ilga.gov/agencies/JCAR/Sections?PartID=07700890&TitleDescription=TITLE%2077:%20%20PUBLIC%20HEALTH
• 2021 IECC – Illinois State Energy Conservation Code*
  Code: https://www.ilga.gov/agencies/JCAR/Sections?PartID=07100600&TitleDescription=TITLE%2071:%20%20PUBLIC%20BUILDINGS,%20FACILITIES%20AND%20REAL%20PROPERTY
• 2018 Illinois Accessibility Code
  Code:https://www.ilga.gov/agencies/JCAR/Sections?PartID=07100400&TitleDescription=TITLE%2071:%20%20PUBLIC%20BUILDINGS,%20FACILITIES%20AND%20REAL%20PROPERTY
• DeKalb County Code

*NOTE: Amended