Illinois

CODE ADOPTION MAP

Illinois

Capital Development Board
William G. Stratton Building

401 S. Spring St.
Third Floor
Springfield, IL 62706
Building Codes and Regulations – Illinois Codes

Current Codes and Edition Adopted:

2018 International Energy Conservation Code (IECC)

*Building and Residential Codes by Municipality can be found below in the Notes section.

Applicability (statewide, local, limited): LIMITED

There is no State level plan review, enforcement, or inspection. Local municipalities and counties are free to adopt or not adopt codes. In jurisdictions that are not covered by codes, Illinois Public Act 96-0704 mandates the use of the 2006 or newer version of the IBC for commercial construction. In those municipalities that have adopted building codes, those adopted range from the 1990 BOCA Building Code to the 2021 IBC and IRC.

Tall Mass Timber Adoption

The tall mass timber provisions went into effect in 2023 for the following jurisdictions: Calumet City, Edwardsville, Hanover Park, Justice, Kane County, Lake in the Hills, Libertyville, Montgomery, Mt. Morris, Oak Brook, Plainfield, Rock Falls, St. Charles, Sleepy Hollow and Wilmington.

Amendments Disadvantaging Wood Construction:

N/A

Expected date most recent code will be adopted:

Unknown. Some jurisdictions adopt updated codes regularly and some do not.

Next Update Cycle:

There is no update cycle.

Notes:

Code Directory.xlsx (illinois.gov)

Page last updated: December 2022