St. Louis, MO Fire Regulations: Smoke Detectors (2026)
Key Facts
- Coverage
- Every sleeping area, each level, basement, stairwells
- Ceiling placement
- 4+ inches from side wall
- Tenant duty
- Battery upkeep, in-unit testing
- Owner duty
- Install units; maintain common stairwells
- Penalty
- $25-$500 fine or 90 days jail
Summary
St. Louis dwelling owners must install smoke detectors in every sleeping area and stairwell, test common-area units, and never disable a battery.
The owner of each existing dwelling or newly constructed or rehabilitated unit shall install at least one (1) smoke detector to protect each sleeping area... with not less than one detector per level containing a habitable room and in the basement or cellar... It shall be unlawful for any person to remove batteries or in any way make smoke detectors inoperable.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 11).
Full Breakdown
Chapter 25.52 of the Revised Code requires the owner of every dwelling unit to install at least one smoke detector protecting each sleeping area, plus one per level with a habitable room, one in the basement or cellar, and one on the uppermost ceiling of interior stairwells. Detectors must sit at least 4 inches from a side wall on the ceiling, or 4-12 inches down from the ceiling on a wall, and within 15 feet of sleeping rooms. Owners supply, install, and maintain detectors in common stairwells; tenants keep batteries fresh and test units inside their own dwelling units and must notify the owner in writing of any defect. Removing a battery or otherwise disabling a detector is a separate offense.
Violations & Fines
Conviction under Ch. 25.52 carries a fine of $25 to $500, up to 90 days imprisonment, or both; the Director of Public Safety inspects dwelling units for compliance weekdays 9 a.m.-5 p.m.
Frequently Asked Questions
Who installs smoke detectors in a St. Louis rental?
Can a St. Louis tenant remove a smoke detector battery?
Sources & Official References
Other rules in St. Louis
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