Updated : 04/22/2024

Overview

Jefferson County, CO adopted the following codes with supplements that include amendments:

• The International Building Code, 2018 edition. Document found here.
• The International Residential Code, 2018 edition. Document found here.
• The International Existing Building Code, 2018 edition. Document found here.

Jefferson County Code of Ord. § 3-8-4.

Helpful resources for Jefferson County, Colorado include the following.

• PLRB, Ordinance and Law Coverage Discussion for Colorado

Residential Building Code

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

Jefferson 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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Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Jefferson County ? Yes
Citation: https://www.jeffco.us/DocumentCenter/View/13840/2018-Jefferson-County-Residential-Code-Supplement-PDF#page=15
Municipal Code https://www.jeffco.us/DocumentCenter/View/13840/2018-Jefferson-County-Residential-Code-Supplement-PDF#page=15
Comments:

Jefferson County, CO Design Criteria.

Comments

The county adopted the 2018 IRC. Jefferson County Code of Ord. § 3-8-4.

Jefferson County, CO adopted a supplement to the International Residential Code, 2018 edition. Document found here.

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.

There is no mention of the adoption of Appendix J in the supplement to the 2018 IRC.

Commercial Building Code

Jefferson 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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No results were located with the automated search.

Comments

The county adopted the 2018 IBC. Jefferson County Code of Ord. § 3-8-4.

Jefferson County, CO adopted a supplement to the International Building Code, 2018 edition. Document found here.

Existing Buildings

Jefferson County adopted the 2018 IEBC. Jefferson County Code of Ord. § 3-8-4.

Jefferson County, CO adopted a supplement to the International Existing Building Code, 2018 edition. Document found here.

Other Building Codes