Smoke and CO detector relocation

Moving smoke and carbon monoxide detectors that are mounted in the wrong spot.

A detector in the wrong spot may not sound in time, or may go off when it shouldn't. Common problems are detectors too close to the corner where the ceiling meets the wall, too close to a stove or a bathroom door where cooking smoke and steam set them off, or too far from the bedrooms. See spots to avoid.

Moving a detector means taking down its base and mounting it in a better spot. Hardwired detectors also need their wiring moved.

What our reports priced this at

Work	Most homes	Middle price	Based on
Move a smoke detector and its base	About $150		The 13% of homes where it was priced

What HomeCloud reports priced this fix at in homes we evaluated Sep 2025 to Oct 2026. The range is the middle half of homes; the middle price is the median. Your price comes from a written estimate for your home.

What affects the price

Hardwired or battery: A battery detector moves in minutes. A hardwired one needs wire run to the new spot.
Wall and ceiling patching: The old mounting holes may need patching and paint.

More safety resources

Where to put smoke and carbon monoxide detectorsWhich rooms and floors need smoke and CO alarms, spots to avoid, battery vs hardwired vs combination alarms, and when to replace them.Radon test results explainedWhat pCi/L means, short vs long-term tests, the 2.0 and 4.0 levels, why results vary, and what to do with a high result when buying a home.

Other safety repairs

Smoke detectors Carbon monoxide detectors Radon testing and mitigation

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