Cal. Civ. Code § 410.330
Smoke Detectors and Carbon Monoxide Alarms
Operative Text
(A) The owner shall provide, install, and maintain in operable condition smoke detectors and
carbon monoxide alarms in every residence that is required to be equipped with smoke detectors
and carbon monoxide alarms in accordance with M.G.L. c. 148, §§ 26 C-F½ and 780 CMR:
Massachusetts State Building Code, 527 CMR 1.00: Massachusetts Comprehensive Fire Safety
Code, and 248 CMR 10.00: Uniform State Plumbing Code and in compliance with accepted
standards.
(B) The board of health shall immediately notify the chief of the local fire department of any
violation of 105 CMR 410.330 which is observed during an inspection of any residence.
(C) If any residence is found by the local fire department to be adequately equipped with smoke
detectors and carbon monoxide alarms, the board of health shall not be authorized by 105 CMR
410.330 to impose any additional or differing smoke detector or carbon monoxide alarm
requirement beyond that which has been found sufficient by the local fire department.Under 105 CMR 410.330, property owners in Massachusetts are required to supply, install, and keep in working order smoke detectors and carbon monoxide alarms in every residence where such devices are mandated by state fire, building, and plumbing codes. When a board of health inspector observes a violation of this provision, the board must promptly alert the local fire department chief. If the local fire department has already determined that a residence is adequately equipped, the board of health cannot impose any additional or different requirements beyond what the fire department has deemed sufficient.
Plain English — not legal advice.
Compliance with 105 CMR 410.330 generally means that property owners ensure smoke detectors and carbon monoxide alarms are present, properly installed, and functioning in every unit subject to state fire and building code requirements. Operators who stay current with M.G.L. c. 148 and the referenced codes—and who conduct routine maintenance checks—are better positioned to meet the standard this provision sets. Because a board of health violation triggers an automatic notification to the local fire department chief, addressing any equipment deficiencies before an inspection is a common practice among compliant operators.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Under 105 CMR 410.330, tenants have a right to live in a residence equipped with properly installed and maintained smoke detectors and carbon monoxide alarms as required by Massachusetts law. If a tenant believes these devices are missing or non-functional, one general path is to contact the local board of health, which is required by this provision to notify the fire department chief of any violations it observes. Tenants may also reach out to a local tenant-rights organization or legal aid office to understand what remedies or defenses may be available under this provision.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated September 30, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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