Tazewell County, IL Fire Regulations: Smoke Detectors (2026)

09. Division (A) mandates at least one approved smoke detector, in operating condition, within 15 feet of every room used for sleeping, mounted on the ceiling at least six inches from any wall or on a wall between four and six inches from the ceiling. Division (B) additionally requires every single-family residence to have at least one detector on every story, including basements but not unoccupied attics; in split-level homes a detector on the upper level covers the adjacent lower level unless there's an intervening door, in which case each level needs its own.

Division (C) requires structures with more than one dwelling unit, or mixed-use buildings with at least one dwelling unit, to have a detector at the uppermost ceiling of every interior stairwell. Under division (D), the owner must supply and install all required detectors and maintain those in common stairwells and hallways, while tenants test and maintain the detector in their own unit, replace its batteries, and must notify the owner in writing of any deficiency they can't fix themselves. Detectors in any dwelling unit existing on July 1, 1988 may be battery-powered or wired into house current and need not be interconnected, per division (E); but under division (F), any unit newly built, reconstructed, or substantially remodeled after December 31, 1987 must have detectors permanently wired into the AC power line, interconnected so that one alarm triggers all of them.