Smoke detector rules in Milwaukee County come from Wisconsin state law, Wis. Stat. 101.145, not a county ordinance. Owners must install detectors in the basement, at each stairway head, and in or near each sleeping area, on penalty of up to $50 per day.
Smoke detector requirements in Milwaukee County are set statewide by Wis. Stat. 101.145 under the state building code, administered by the Department of Safety and Professional Services; this is not a county matter. The statute requires a residential-building owner to install and maintain a functional smoke detector in the basement, at the head of any stairway on each floor level, and either in each sleeping area or within 6 feet of it and not in a kitchen. Rooms separated by a kitchen or living room are separate sleeping areas, but rooms separated only by a bathroom are not. Each detector must bear a UL or equivalent listing mark. Wis. Stat. 101.149 separately mandates carbon monoxide detectors.
Under Wis. Stat. 101.145, whoever violates the section shall forfeit to the state not more than $50 for each day of violation. Enforcement occurs through local building and rental inspections. Landlords who fail to install detectors face these daily forfeitures.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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