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  • Contact Information

    Jefferson County Building Safety


    Monday - Friday
    7:30 a.m. - 5:30 p.m.

    Contact Us

    100 Jefferson County Parkway
    Suite 3540
    Admin and Courts Facility
    Golden, CO 80419-3540

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  • Carbon Monoxide Alarms


    From the 2012 International Residential Code unless otherwise indicated.

    R315.1 - Carbon Monoxide Alarms

    For new construction, an approved carbon monoxide alarm shall be installed outside of each separate sleeping area in the immediate vicinity of the bedrooms in dwelling units within which fuel-fired appliances are installed - and in dwelling units that have attached garages.

    R315.3 - Where Required in Existing Dwellings

    Where work requiring a permit occurs in existing dwellings that have attached garages or in existing dwellings within which fuel-fired appliances exist, carbon monoxide alarms shall be provided in accordance with Section R315.1.

    R315.4 - Alarm Requirements

    Single station carbon monoxide alarms shall be listed as complying with UL 2034 and shall be installed in accordance with this code and the manufacturer's installation instructions.


    State law, HB09-1091, View exit disclaimer policy page for links to third-party websites. requires owners of dwelling units with either attached garages or fuel-fired appliances to install carbon monoxide alarms when the home undergoes "interior alterations, repairs, fuel-fired appliance replacement, or additions, any of which require a building permit."

    Last Updated: 12-31-2013