Ottawa, Illinois Building Codes

Updated : 04/22/2024

Overview

Ottawa, IL has adopted the 2012 International Codes, with amendments, including the 2012 IRC and IBC. Ottawa, IL Muni. Code § 22-121 (adoptions and amendments).

Helpful resources for Ottawa, Illinois include the following.

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.

Ottawa 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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2018 IRC(Ottawa, IL Sec. 22-121. - Adoption and amendments.)

...(e) Additions, Deletions and Modifications of the International Residential Code. The following sections of the aforesaid International Residential Code, 2018 edition, are hereby amended, deleted or modified as hereinafter set forth:...

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Ottawa ? Yes
Citation: § 22-121
Municipal Code https://library.municode.com/il/ottawa/codes/code_of_ordinances?nodeId=CH22BUBURE_ARTIIIBUCO_S22-121ADAM
Comments:

Table 301.2(1) Climatic and geographic design criteria. Insert under each category:

Ground Snow Load 25 lbs.
Wind Speed 90 mph (No topographic effects)
Seismic Design Category B
Weathering Severe
Frost Line Depth 42 inches
Winter Design Temperature 0
Ice Barrier Underlayment Required Yes
Flood Hazards FIRM 525, 530,535. FIS dated July 18, 2011
Air Freezing Index 2000
Mean Annual Temperature 51.5

 

Government Officials
Last Name First Name Title E-mail Phone Note
Stafford Mathew Ordinance Enforcement mstafford@cityofottawa.org 815/433-0161 ext. 230

Comments

Ottawa, IL has adopted the 2012 IRC including appendices F and J. 

Section 313 Delete entire section (Residential Sprinklers)

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.

Ottawa, IL has adopted the 2012 IRC including appendix J. Ottawa, IL Muni. Code § 22-121.

Commercial Building Code

Ottawa 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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2018 IBC(Ottawa, IL Sec. 22-125. - Additional requirements.)

...Notwithstanding the adoption of the 2018 International Building Code and the 2018 International Residential Code, or any provision of this article III to the contrary, the following building requirements and regulations shall apply to all residential construction: (1)...

Comments

Ottawa, IL has adopted the 2012 IBC including appendix G.

Existing Buildings

Ottawa, IL did not adopt the IEBC, therefore Chapter 34 of the IBC would apply.

Other Building Codes

Ottawa, IL also adopted the following codes:

2000 Life Safety Code (NFPA 101). Ottawa, IL Muni. Code § 22-121.

2017 National Electrical Code. Ottawa, IL Muni. Code § 22-164.

Illinois State Plumbing Code. Ottawa, IL Muni. Code § 22-209.

2012 International Property Maintenance Code. Ottawa, IL Muni. Code § 22-300.

While no formal online code was located, the Ottawa, IL website states it has adopted and utilizes the following codes:

2012 International Mechanical Code.

2004 Illinois State Plumbing Code.

1997 Illinois Accessibility Code.

2012 International Fire Code.

2012 International Energy Conservation Code.