Updated : 04/22/2024

Overview

Jefferson County, Mo. adopted the following codes:

• The International Building Code, 2015 edition. Jefferson, Mo. County Code, § 500.390 (amendments).
• The International Residential Code, 2015 edition. Jefferson, Mo. County Code, § 500.400 (amendments).
• TheInternational Existing Building Code, 2015 edition. Jefferson, Mo. County Code, § 500.480 (amendments).
• The International Energy Conservation Code, 2015d edition. Jefferson, Mo. County Code, § 500.440 (amendments).

Jefferson, Mo. County Code, § 500.010 (codes adopted).

Helpful resources for Jefferson County, Missouri include the following.

• PLRB, Ordinance and Law Coverage Discussion for Missouri

Residential Building Code

Missouri has yet to adopt a statewide residential code. Local laws will control.See PLRB, Missouri Building Codes for more information on state level codes.

Jefferson County adopted the 2015 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 Gen.code(Jefferson County , MO Section 13.2 Building Codes.)

...municipalities and districts that provide for the coordinated adoption of uniform Building Codes procedures for enforcement of Building Codes licensing of contractors are to encourage such intergovernmental agreements in order to provide span classhighlightuniformspan...

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Jefferson County ? No
Citation: TABLE R301.2(1). Delete and insert in lieu thereof the following:
Municipal Code https://www.ecode360.com/27891308
Comments:

Table R301.2(1)
Climatic and Geographic Design Criteria
	Wind Design					Subject to Damage Form
Ground Snow Load	Speedd (mph)	Topo-graphic effectsk	Special wind region1	Wind-borne debris zonem	Seismic Design Cate-goryf	Wea-theringa	Frost line depth b	Ter-mitee	Winter Design Temp a	Ice Barrier Under-layment Re-quiredb	Flood Haz-ardsg	Air Freez-ing Indexl	Mean Annual Tempj
20	115 (51)	NO	NO	NO	C	SEVERE	30	NO	6	NO		1,000	55.2

Comments

Jefferson County, Mo. adopted the International Residential Code, 2015 edition. Jefferson, Mo. County Code, § 500.400 (amendments).

• Ice barrier is not required. Id.
• Appendix E is deleted and substituted in a modified form. Id.

 

Commercial Building Code

Jefferson County adopted the 2015 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 Gen.code(Jefferson County , MO Municipal Code)

...Adoption not found...

Comments

Jefferson County, Mo. adopted the International Building Code, 2015 edition. Jefferson, Mo. County Code, § 500.390 (amendments).

Other Building Codes