Fort Collins, CO Fire Regulations: Smoke Detectors (2026)
Key Facts
- Standard
- UL 217-listed alarms, NFPA 72 install
- Retrofit trigger
- New sleeping room in existing building
- Bedroom alarm tone
- 520-Hz signal where alarm system required
- False alarm threshold
- 2 activations in 60 days
- Penalty
- Misdemeanor under § 1-15
Summary
Fort Collins requires listed smoke alarms meeting UL 217 in dwellings under a 2024 International Fire Code amendment, City Code § 9-2, Section 907.2.11. Adding or creating a sleeping room in an existing residential building triggers a duty to bring the entire building up to the smoke-detector standard required for new construction, and bedrooms needing a fire alarm system must use a 520-Hz alarm tone.
907.2.11 Single- and multiple-stations smoke alarms. Listed single- and multiple-station smoke alarms complying with UL 217 shall be installed in accordance with Sections 907.2.11.1 through 907.2.11.7, NFPA 72 and the manufacturer's instructions. Where one or more sleeping rooms are added or created in existing Group R Occupancies, the entire building shall be provided with smoke detectors located and installed as required for new Group R Occupancies described herein.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Municipal Code: Supplement 155 | Transitional Land Use Code (for project before May 17, 2024): Supplement 61 | Traffic Code: Supplement 27).
Full Breakdown
7, NFPA 72 and the manufacturer's instructions. The same amendment adds a retrofit trigger: whenever one or more sleeping rooms are added or created inside an existing Group R occupancy, such as a house, duplex, or apartment building, the entire building must then be equipped with smoke detectors located and installed to the same standard required for new Group R construction, not just the added bedroom. 9 already requires a fire alarm system, the audible smoke-alarm signal inside the bedroom must be a 520-Hz low-frequency tone complying with NFPA 72, a tone shown to wake sleepers, including those who are hard of hearing, more reliably than a standard alarm; if the installed alarm cannot produce that tone, a listed notification appliance or another method the Fire Code Official approves must supply it.
5, defining excessive false alarms as two activations of a fire alarm system within any sixty-day period not caused by something beyond the owner's control, after which the Fire Code Official may order repairs, tamper-proof devices, system redesign, or a maintenance contract with a qualified technician under NFPA 72.
Violations & Fines
Failing to install UL 217-listed smoke alarms as required, skipping the building-wide retrofit after adding a sleeping room, or ignoring a Fire Code Official order following excessive false alarms under § 907.8.5 is enforced as a Chapter 9 violation, a misdemeanor under § 9-4 punishable per § 1-15, with each ten-day period of noncompliance treated as a new offense.
Frequently Asked Questions
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Sources & Official References
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