Springfield, IL Building Safety: Carbon Monoxide Detectors (2026)

Sec. 35 governs multi-dwelling unit alarm systems, and coverage turns on the criteria in subsection (a): a building is covered if it has thirteen dwelling units or more, four stories or more (measured as any level with more than half its height above perimeter grade), or three stories or fewer where direct exterior exiting isn't available from every unit. Covered buildings, whether newly built or altered under a permit exceeding $1,000 in cost, must install the fire alarm detection system spelled out in subsection (b), which runs from fixed-temperature detectors in attics and equipment rooms to photoelectric smoke detectors in corridors and stairways, pull stations, an annunciator panel, and a control panel with emergency power.

Subsection (e) then layers carbon monoxide detection on top of that system, citing both the state's Carbon Monoxide Alarm Detector Act, 430 ILCS 135, effective January 1, 2007, and the CO-detector provisions of the 2018 International Fire and Building Code the city has adopted. Buildings meeting certain criteria in subsection (d), located in the fire district, four stories or taller, or with thirteen units or more, must also connect their fire alarm systems to an approved central or remote monitoring station, which the Fire Safety Division oversees through its plan review process.