How Much Are Smoke Alarms?

The average cost to install a smoke alarm or carbon monoxide detector is $65 for one unit.

Each addition unit is $20.

How much does it cost to replace a smoke detector?

Smoke detectors can cost as little as $10 per unit, but can range up to around $100 for the upper end of the market. The bulk of the cost comes from hiring an electrician to install, at an average of $50/hr.

How much does it cost to install hardwired smoke alarms?

The average cost to have a smoke detector hardwired into your home is around $150. Yes, electricians install smoke alarms that are hardwired or interconnected.

Can I get a free smoke detector?

The Red Cross and its partners can test existing smoke alarms and install up to three free smoke alarms for those that need them. If you are able to purchase and install your own smoke alarm but would like information on home fire safety and smoke alarm installation, please visit

What brand of smoke detector is best?

Here are the best smoke detectors you can buy:

  • Best smoke detector overall: First Alert Smoke and Carbon Monoxide Alarm.
  • Best hardwired smoke detector: Kidde Smoke Alarm Dual Sensor.
  • Best dual-sensor smoke detector: First Alert Photoelectric and Ionization Smoke Alarm.