Updated : 09/16/2024

Overview

St. Clair County, Illinois, adopted the 2012 International Residential Code (IRC), including appendix G, H, with amendments. St. Clair County, IL, Muni. Code § 7-2-1 (adoption) and § 7-2-72 (amendments). St. Clair County, Illinois, adopted the 2012 International Building Code (IBC), including appendices F, G, J, with amendments. St. Clair County, IL, Muni. Code § 7-1-1 (adoption) and § 7-1-91 (amendments). For St. Clair County, no local adoption and no local amendments of an existing building code were located. 

Helpful resources for St. Clair County, Illinois include the following.

• Jurisdiction's Information Page(s):
  • St. Clair County, IL Website
  • St. Clair County, IL Building Regulations
• PLRB, Ordinance and Law Coverage Discussion for Illinois

Residential Building Code

Illinois has yet to adopt a statewide residential code. Local laws will control.See PLRB, Illinois Building Codes for more information on state level codes.

St. Clair County adopted the 2012 IRC, locally. Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the model code here.

You can find information about amendments to the model code here.

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Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for St. Clair County ? See R905.2.7.2
Citation: St. Clair County, IL, Muni. Code § 7-2-70 (amendments).
Municipal Code https://www.co.st-clair.il.us/webdocuments/departments/zoning/Chapter%207%20-%20Building%20Regulations.pdf?11:57%20AM#page=60
Comments:

R905.2.7.1 Ice Barrier

In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in Table R301.2(1), an ice barrier that consists of a least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet, shall be used in lieu of normal underlayment and extend from the lowest edges of all roof surfaces to a point at least 24 inches (610 mm) inside the exterior wall line of the building. 

Exception: Detached accessory structures that contain no conditioned floor area.

Government Officials

Comments

St. Clair County, Illinois, adopted the 2012 International Residential Code (IRC), including appendix G, H, with amendments. St. Clair County, IL, Muni. Code § 7-2-1 (adoption) and § 7-2-72 (amendments).

Existing Buildings

Existing buildings, meaning buildings that were built in accordance to code at the time of construction, typically merit extra consideration in a current updated code.

Please refer to appendix J of the adopted 2012 IRC. 

For St. Clair County, no local adoption and no local amendments of an existing building code were located. 

Commercial Building Code

St. Clair County adopted the 2012 IBC, locally . Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the code here.You can find information about amendments to the model code here.

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Comments

St. Clair County, Illinois, adopted the 2012 International Building Code (IBC), including appendices F, G, J, with amendments. St. Clair County, IL, Muni. Code § 7-1-1 (adoption) and § 7-1-91 (amendments).

Existing Buildings

For St. Clair County, no local adoption and no local amendments of an existing building code were located. 

Other Building Codes