Updated : 04/22/2024

Overview

Linn County, IA has adopted the 2018 International Codes, with amendments, including the 2018 IRC and IBC. Linn County, IA County Codes § 105-16 (adoptions) and § 105-17 (amendments).

Helpful resources for Linn County, Iowa include the following.

• PLRB, Ordinance and Law Coverage Discussion for Iowa

Residential Building Code

Iowa adopted a model state residential code but it is not in force unless adopted locally.See PLRB, Iowa Building Codes for more information on state level codes.

Linn County 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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2015 IRC with Iowa amendments(Linn County, IA Sec. 105-16. - International construction codes adopted, title.)

...Building Code, 2021 edition, including appendix K titled Administrative Provisions, the International Residential Code, 2021 edition, including appendix F titled Passive Radon Gas Controls as prepared and edited by the International Code Council, Inc. and the provisions of said codes shall be controlling in the construction of buildings...

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Linn County ? Yes
Citation: § 105-17
Municipal Code https://library.municode.com/ia/linn_county/codes/code_of_ordinances?nodeId=PTIILADEOR_CH105BUBURE_ARTIICORE_S105-17AMINBUCOINRECO
Comments:

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

Ground  Snow  Load

Wind Design

Seismic  Design  Category

Subject to Damage from

Winter  Design  Temp

Ice Barrier  Underlayment  Required

Flood Hazards

Air  Freezing  Index

Mean  Annual  Temp

Speed  (MPH)

Topographic  Effects

Special  Wind  Region

Wind  Borne  Debris  Zone

Weathering

Frost  Line  Depth

Termite

NFIP  ADOPTION

FIRM MAPS

30 PSF

115

NO

No

No

A

Severe

42"

Moderate—  Heavy

-5°F

YES

Dec 15, 1982

April 5, 2010

1784

48.9

 

Government Officials

Comments

Linn County, IA has adopted the 2018 IRC including appendix F. Linn County, IA County Code § 105-16 (adoptions)

R313.2. One- and Two-Family Dwellings Automatic Fire Sprinkler Systems. Automatic residential fire sprinkler systems shall be installed in one- and two-family dwellings when the following condition exists:

1. The one- or two-family dwelling has a floor area greater than 4,000 square feet on any one story or greater than 8,000 square feet of total floor area for all stories, excluding non-habitable areas separated from the rest of the building by a minimum of one-hour fire-resistive construction and containing smoke or heat detection interconnected with the dwelling unit smoke detectors.

Exception: An automatic residential fire sprinkler system shall not be required when additions or alterations are made to existing one- and two-family dwellings that do not have an automatic residential fire sprinkler system installed.

Commercial Building Code

Linn County 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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2015 IBC with Iowa amendments(Linn County, IA Municipal Code)

...Adoption not found...

Existing Buildings

Linn County, IA did not adopt the IEBC, therefore Chapter 34 of the IBC would apply.

Other Building Codes