Columbia, MO Building Safety: Carbon Monoxide Detectors (2026)
Key Facts
- Governing code
- 2018 IRC as locally amended
- Interconnection exception
- Not required in ≤2-story dwellings
- Power source exception
- Battery-powered allowed in alterations
- Max penalty
- $1,000 fine or 1 year jail
- Enforcing office
- Division of Building and Site Development
Summary
Columbia, Missouri enforces carbon monoxide alarm requirements under its locally amended 2018 Residential Code, letting battery-powered alarms in altered dwellings and skipping interconnection wiring in buildings of two stories or fewer.
R315.5. Interconnectivity. Add the following to the exception: Carbon monoxide alarms shall not be required to be interconnected if the dwelling is no more than two (2) stories.
R315.6 Power source. At the end of the section, add the following exception: 3. Carbon monoxide alarms in alterations shall be permitted to be battery operated if the dwelling is no more than two (2) stories.
R322 Flood Resistant Construction. Buildings and structures constructed in whole or in part in a floodplain overlay district shall meet the requirements of section 29-2.3(d) of the Code of Ordinances.
R326.1. General. The design and construction of pools shall comply with section 11-277 of the Code of Ordinances adopting the 2015 "Swimming Pool Ordinance and Guide for Swimming Pool Design and Operation." The Swimming Pool Ordinance and guide for Swimming Pool Design and Operation is attached to ordinance number 002439.
R326.2 Barrier requirements. Barrier requirements must meet the standards of the 2018 International Swimming Pool and Spa Code (ISPSC) Section 305.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 138).
Full Breakdown
Columbia adopted the 2018 International Residential Code for One- and Two-Family Dwellings under City Code § 6-65, then amended it at § 6-66. The amendment eases two default IRC carbon monoxide alarm rules: alarms in a dwelling of no more than two stories need not be interconnected, and CO alarms installed during alterations to a two-story-or-fewer dwelling may run on battery power instead of hardwiring. The Division of Building and Site Development, part of the Department of Housing and Neighborhood Services in Boone County's seat, enforces the residential code; violations carry the code-wide penalty of up to a $1,000 fine or one year in jail per day of noncompliance under § 6-66's R113.4 amendment.
Violations & Fines
Violating the Building Code, including the carbon monoxide alarm rules, is a misdemeanor punishable by up to a $1,000 fine, up to one year in jail, or both; each day of noncompliance is a separate offense.
Frequently Asked Questions
Does Columbia require carbon monoxide alarms in existing homes?
Can I use a battery-only CO alarm during a remodel in Columbia?
Sources & Official References
Other rules in Columbia
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