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Wisconsin Statutes

Wis. Stat. § 101.645 (2026)

Smoke detectors

✓ laws through the 2025-26 session (checked Sept. 2026)
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101.645101.645 Smoke detectors.
101.645(1)(1) Definition. The definition of “smoke detector” under s. 101.145 (1) (c) also applies to this section.
101.645(2)(2) Approval and installation. A smoke detector required under this section shall be approved and installed as required under s. 101.145 (2) and (3) (a).
101.645(3)(3) Requirement. The owner of a dwelling shall install a functional smoke detector in the basement of the dwelling and on each floor level except the attic or storage area of each dwelling unit. The occupant of such a dwelling unit shall maintain any smoke detector in that unit, except that if any occupant who is not the owner, or any state, county, city, village or town officer, agent or employee charged under statute or municipal ordinance with powers or duties involving inspection of real or personal property, gives written notice to the owner that the smoke detector is not functional the owner shall provide, within 5 days after receipt of that notice, any maintenance necessary to make that smoke detector functional.
101.645(4)(4) Inspection. Except as provided under s. 101.64 (2m), the department or a municipal authority may inspect a new dwelling, may inspect the common areas of a dwelling, and, at the request of the owner or renter, may inspect the interior of a dwelling unit in a dwelling to ensure compliance with this section.
101.645 HistoryHistory: 1977 c. 388; 1983 a. 189 s. 329 (4); 1987 a. 376; 1989 a. 109; 2017 a. 330.
101.645 Cross-referenceCross-reference: See also ch. SPS 328, Wis. adm. code.
101.645 AnnotationThis section is a safety statute the violation of which constitutes negligence per se. Johnson v. Blackburn, 220 Wis. 2d 260, 582 N.W.2d 488 (Ct. App. 1998), 97-1414.
Notes of Decisions
Cited in 2 cases, 1998–1999 · leading case: Johnson v. Blackburn, 595 N.W.2d 676 (Wis. 1999).
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Johnson v. Blackburn, 595 N.W.2d 676 (Wis. 1999). · cites it 76× “The circuit court held that the plaintiffs' negligence per se claim against the landlords was *253 established as a matter of law because the landlords violated Wis. Stat. § 101.645 (1993-94) [2] by failing to provide a smoke detector in the basement.”
Johnson v. Blackburn, 582 N.W.2d 488 (Wis. Ct. App. 1998). · cites it 34× “As with the complaints pertaining to Joel, Bryana's complaint did not cite to § 101.645, Stats., or any other statute, ordinance or regulation in support of the negligence claim against the Blackburns.”
Wis. Stat. § 101.645(2): 1 case
Johnson v. Blackburn, 595 N.W.2d 676 (Wis. 1999). “The circuit court held that the plaintiffs' negligence per se claim against the landlords was *253 established as a matter of law because the landlords violated Wis. Stat. § 101.645 (1993-94) [2] by failing to provide a smoke detector in the basement.”
Wis. Stat. § 101.645(3): 1 case
Johnson v. Blackburn, 582 N.W.2d 488 (Wis. Ct. App. 1998). “As with the complaints pertaining to Joel, Bryana's complaint did not cite to § 101.645, Stats., or any other statute, ordinance or regulation in support of the negligence claim against the Blackburns.”
Annotations are extracted automatically from the opinions in the Syfert caselaw corpus and ranked by authority, recency, and treatment. Dots show Syfertize treatment of the citing case itself.