Smoke Detector & Carbon Monoxide Information

Smoke & Carbon Monoxide Detector RequirementsSmoke Detector Image



For ease of use, the informational links are based on when your house was built. However, if the property was renovated with additional bedrooms, added an attached garage or major alterations including gutting, re-configuring bedroom walls, installing hard-wired smoke detectors, etc., choose the link for the time period when the renovation was performed. Once smoke detectors are hard-wired they need to remain hard wired.

Smoke detectors older than 10 years old need to be replaced. 
Carbon Monoxide detectors need to be replaced every 5 to 7 years depending on the manufacturer's instructions. 

On December 1, 2016, the State of Massachusetts updated the smoke detector requirements for residences built prior to 1975.  Most of these residences will have only battery-operated smoke detectors.

  • *Constructed from 1975 and Prior to 1997 (Hard-Wired Smoke Detectors)
  • *Constructed 1997 to Dec 2007 (Hard-Wired Smoke Detectors now required in bedrooms)
  • *Constructed from January 1, 2008 to February 3, 2011
  • *Constructed after February 4, 2011
Above links are under construction. Information is available at Fire Department Headquarters.

Smoke Detector Inspections



A Certificate of Compliance is required for the sale or transfer of a property (M.G.L. c 148 s. 26). Appointments for the inspections are to be made in person 2 to 3 weeks before the scheduled closing date at Fire Department Headquarters during business hours. The inspection fee is collected at the time the appointment is made. The office accepts exact cash or check.