How Much Does a Handyman Charge to Install Smoke Detectors?

Quick Answer: A handyman charges $65 to $150 to install smoke detectors in 2026, depending on how many and whether they are battery or hardwired. Swapping a few battery units is quick and lands at the low end. Hardwired, interconnected detectors, where all alarms sound together, run more because of the wiring. The detectors are not included.

What Smoke Detector Installation Costs

Battery-powered units are the simple job. The pro mounts the bracket, sets the unit, tests it, and you are done, $65 to $150 for a few around the house. Replacing old detectors on schedule (they expire after about ten years, and most people forget) is cheap insurance. Bundling several in one visit keeps the per-unit cost down.

Hardwired and Interconnected Detectors

Homes built to code have hardwired detectors that are interconnected, so when one senses smoke, they all sound. Replacing these on existing wiring is still handyman work, but it takes longer per unit than a battery swap. Adding hardwired detectors where none existed is new wiring and crosses into electrician territory. A good handyman tells you which situation you are in.

Do Not Forget Carbon Monoxide

Many areas now require carbon monoxide detectors near sleeping areas, especially with gas appliances or an attached garage. Combo smoke-and-CO units cover both, and a handyman can add them in the same visit. This is safety hardware, so placement matters as much as the unit.

Frequently Asked Questions

How often should smoke detectors be replaced?

The units expire after about ten years, batteries sooner. If yours are older than a decade, replace the units, not just the batteries.

Can a handyman install hardwired detectors?

Yes, on existing wiring. Adding new hardwired units where none existed is new wiring, an electrician job.

How many detectors does a house need?

Generally one in each bedroom, one outside each sleeping area, and one on each level. Your handyman can advise placement.