Updated : 07/22/2024

Overview

Oak Brook, Illinois, adopted the 2021 International Residential Code (IRC), including appendices A, B, C, D, F, G, H, I, J, K, M, O, Q, R, S, T, and U, with amendments. Oak Brook, IL, Muni. Code § 10-1-1 (adoption) and § 10-1-2 (amendments) (B). Oak Brook, Illinois, adopted the 2021 International Building Code (IBC), including appendices A, C, E, F, G, I, and K, with amendments. Oak Brook, IL, Muni. Code § 10-1-1 (adoption) and § 10-1-2 (amendments) (A). Oak Brook, Illinois, adopted the 2021 International Existing Building Code (IEBC), with amendments. Oak Brook, IL, Muni. Code § 10-1-1 (adoption) and § 10-1-2 (amendments) (I).

Helpful resources for Oak Brook, Illinois include the following.

• Jurisdiction's Information Page(s):
  • Oak Brook, IL Website
  • Oak Brook, IL Village Code
  • Oak Brook, 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.

Oak Brook adopted the 2021 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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See sterling(Oak Brook, IL Municipal Code)

...Adoption not found...

2021 IRC(Oak Brook, IL 10-1-1: BUILDING CODES ADOPTED:)

...International Residential Code: 2021 edition, including appendix chapters A, B, C, D, F, G, H, I, J, K, M, O, Q, R, S, T, and U (see international residential code section R101.2.1, 2021 edition), published by the International Code Council, Inc. C. International Mechanical Code: 2021 edition, including appendix chapter A (see international mechanical code section 101.2.1, 2021 edition), published by the International Code Council, Inc....

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Oak Brook ? Yes
Citation: Oak Brook, IL, Muni. Code § 10-1-2 (amendments).
Municipal Code https://codelibrary.amlegal.com/codes/oakbrookil/latest/oakbrook_il/0-0-0-6449
Comments:

Table R301.2.(1)
Climatic And Geographic Design Criteria 

Ground snow load	25 lb/ft2
Ultimate wind design	107 mph*
Seismic design category	A
Subject to damage from	Weathering	Severe
	Frost line depth	42″
	Termite	Moderate to severe
Winter design temperature	-4°F, 97½%
Summer design temperature	89°F dry bulb, 2½%
	76°F wet bulb, 2½%
Ice barrier underlayment	Required
Flood hazards	FIRM #170214 Panels 0606H-0609H 12/16/2004
Air freezing index	1543 (°F – days)
Annual mean temperature	49.4°F
Heating degree days (HDD)	6,155
Cooling degree days (CDD)	942
Climate zone	5A
Indoor design conditions	Max. 72°F – heating Min. 75°F – cooling
100-year hourly rainfall rate	4″

*Ultimate Design Wind Speed replaces Basic Wind Speed as found in earlier editions. Although the values are different, there is very little practical difference in the design or construction requirements.

Government Officials

Comments

Oak Brook, Illinois, adopted the 2021 International Residential Code (IRC), including appendices A, B, C, D, F, G, H, I, J, K, M, O, Q, R, S, T, and U, with amendments. Oak Brook, IL, Muni. Code § 10-1-1 (adoption) and § 10-1-2 (amendments) (B).

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 2021 IRC.

Oak Brook, Illinois, adopted the 2021 International Existing Building Code (IEBC), with amendments. Oak Brook, IL, Muni. Code § 10-1-1 (adoption) and § 10-1-2 (amendments) (I).

Commercial Building Code

Oak Brook 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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See Amlegal(Oak Brook, IL Municipal Code)

...Adoption not found...

2015 IBC(Oak Brook, IL 10-1-1: BUILDING CODES ADOPTED:)

...10-1-1: Building CODES ADOPTED:A. International Building Code: 2015 edition, including appendix chapters A, C, E, F, G, I, and K (see International...

Comments

Oak Brook, Illinois, adopted the 2021 International Building Code (IBC), including appendices A, C, E, F, G, I, and K, with amendments. Oak Brook, IL, Muni. Code § 10-1-1 (adoption) and § 10-1-2 (amendments) (A).

Existing Buildings

Oak Brook, Illinois, adopted the 2021 International Existing Building Code (IEBC), with amendments. Oak Brook, IL, Muni. Code § 10-1-1 (adoption) and § 10-1-2 (amendments) (I).

Other Building Codes