Updated : 04/23/2024

Overview

No adoption of the International Residential Code (IRC) was found. DuPage County, Illinois, adopted the 2021 International Building Code (IBC), with amendments. DuPage County, IL, Muni. Code § 8-700 (adoption and amendments). DuPage County, Illinois, adopted the 2021 International Existing Building Code (IEBC), with amendments. DuPage County, IL, Muni. Code § 8-1200 (adoption and amendments). 

Helpful resources for DuPage County, Illinois include the following.

• 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.

DuPage County adopted no code locally that we know of after conducting researchYou can find a copy of the code here.

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See Muni. Code(DuPage County, IL 8-900: - ADOPTION BY REFERENCE.)

...Delete any references to the International Existing Building Code, International Plumbing Code, International Residential Code, International Zoning Code and insert in lieu thereof: DuPage County Building Code. 8....

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for DuPage County ? Yes
Comments:

While no formal online code regarding ice barriers was located, Mohammed Ansari, Plans Examiner of Dupage County, IL confirmed they are required. (Per email 12/27/19.)

In response to an inquiry as to whether adjacent elevations need residing due to WRB requirement for a 6″ joint overlap. When repairing more than 150 sq. ft. of siding, the entire exterior wall system must be resided and brought up to code.

We follow the Dupage County Building Code for 1 & 2 family residential.
Per section 8-103.3 of our code when 150 sq.ft. or more of the existing siding is damaged the
entire exterior shall be constructed as new construction. In the Dupage County Building Code:
House wrap is required and shall follow manufacturer specs for installation.  Per our code, fasteners
to be plastic cap nails.

Regards,

MOHAMMED ANSARI
Buildings Plans Examiner
DuPage County Building & Zoning
421 N County Farm Rd.
Wheaton, IL  60187
Office 630-407-6788
Mohammed.Ansari@Dupageco.org

(Email 3/22/24)

Government Officials

Comments

We were unable to locate any formal adoption of a residential code by DuPge County, IL. We reached out to the department and received no response regarding this matter. Some jurisdictions adopt the IRC by way of reference in the administrative chapters of the IBC. This could be the case for DuPage County.

101.2 Scope. The provisions of this code shall apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, maintenance, removal and demolition of every building or structure or any appurtenances connected or attached to such buildings or structures.

Exception:

Detached one- and two-family dwellings and multiple single-family dwellings (townhouses) not more than three stories above grade plane in height with a separate means of egress and their accessory structures shall comply with the International Residential Code.

2015 IBC § 101.2 (scope). Dupage County, IL County Code § 8-700 (IBC 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.

DuPage County, Illinois, adopted the 2021 International Existing Building Code (IEBC), with amendments. DuPage County, IL, Muni. Code § 8-1200 (adoption and amendments). 

Commercial Building Code

DuPage County adopted the 2021 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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Latest IBC(DuPage County, IL 8-500: - ADOPTION BY REFERENCE.)

...There is hereby adopted by reference, as if fully set out herein, that certain code known as the State of Illinois Energy Efficient Building Code. B. The Code shall mean the latest published edition of the International Code...

Comments

DuPage County, Illinois, adopted the 2021 International Building Code (IBC), with amendments. DuPage County, IL, Muni. Code § 8-700 (adoption and amendments).

Existing Buildings

DuPage County, Illinois, adopted the 2021 International Existing Building Code (IEBC), with amendments. DuPage County, IL, Muni. Code § 8-1200 (adoption and amendments). 

Other Building Codes