Updated : 07/29/2024

Overview

Ottawa, Illinois, adopted the 2018 International Residential Code (IRC), including appendices A, B, C, D, E, G, H, I, J, K, L, M, N, O, P, Q, R, S, with amendments. Ottawa, IL, Muni. Code § 22-121 (adoption and amendments). Ottawa, Illinois, adopted the 2018 International Building Code (IBC), including appendices C, F, G, K, N, with amendments. Ottawa, IL, Muni. Code § 22-121 (adoption and amendments). Ottawa, Illinois, adopted the 2018 International Existing Building Code (IEBC), with amendments. Ottawa, IL, Muni. Code § 22-500 (adoption) and § 22-502 (amendments).

Helpful resources for Ottawa, Illinois include the following.

• Jurisdiction's Information Page(s):
  • Ottawa, IL Website
  • Ottawa, IL Municipal Code
  • Ottawa, 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.

Ottawa adopted the 2018 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: Ottawa, IL, Muni. Code § 22-121 (amendments).
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

Comments

Ottawa, Illinois, adopted the 2018 International Residential Code (IRC), including appendices A, B, C, D, E, G, H, I, J, K, L, M, N, O, P, Q, R, S, with amendments. Ottawa, IL, Muni. Code § 22-121 (adoption and 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 2018 IRC.

Ottawa, Illinois, adopted the 2018 International Existing Building Code (IEBC), with amendments. Ottawa, IL, Muni. Code § 22-500 (adoption) and § 22-502 (amendments).

Commercial Building Code

Ottawa adopted the 2018 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, Illinois, adopted the 2018 International Building Code (IBC), including appendices C, F, G, K, N, with amendments. Ottawa, IL, Muni. Code § 22-121 (adoption and amendments).

Existing Buildings

Ottawa, Illinois, adopted the 2018 International Existing Building Code (IEBC), with amendments. Ottawa, IL, Muni. Code § 22-500 (adoption) and § 22-502 (amendments).

Other Building Codes