Champaign, IL Fire Regulations: Smoke Detectors (2026)

2, 'Smoke alarms,' sits in Subdivision IV of Chapter 22's Fire Safety Requirements division and applies to Groups R-2, R-3, R-4 and to dwellings not otherwise regulated as Group R occupancies, regardless of occupant load. It sets three placement rules: a smoke alarm on the ceiling or wall outside each separate sleeping area in the immediate vicinity of bedrooms; a smoke alarm inside each room actually used for sleeping; and a smoke alarm on every story of the dwelling unit, including basements and cellars but not crawl spaces or uninhabitable attics.

Split-level units get a small accommodation: where there's no door between adjacent levels, an alarm on the upper level covers the lower level too, as long as the lower level sits less than one full story below. 3 sets the power standard: smoke alarms must draw primary power from the building's commercial wiring with battery backup, must signal when the battery is low, and can be permanently battery-only only in narrow cases, buildings under no construction, buildings without electrical service, or existing spaces being altered without exposing the wall or ceiling structure.

4 layers on interconnection: where more than one smoke alarm is required in a single unit in these occupancy groups, all of them must be wired or linked so that one activating triggers every alarm in the unit, audible in every bedroom over background noise with doors closed, again with an exception for buildings not undergoing alteration, repair or construction. These three sections together give Champaign's fire code a placement, power-source and interconnection standard tracking the International Fire Code as locally adopted.