Mains-wired smoke alarms cost in Bolton & Wigan
Mains-wired alarms with battery backup, linked so they all sound together, are the standard for new and rewired homes and a sensible upgrade in any house.
Prices checked November 2026
Mains-wired smoke alarms prices, 2026
| Job | Typical range |
|---|---|
| 3–4 interlinked mains alarms, fitted | £250 – £600 |
| Each extra alarm (smoke, heat or CO) | £70 – £140 |
BestBuilders describes these as indicative 2026 prices compiled from published installer pricing, not from its own quotes, so treat them as a budget guide.
Usually included
- Mains alarms with battery backup, interlinked
- Testing and certification
Often extra
- Making good where cables are run
- A new circuit if one is needed
What changes the price
- Number of alarms
- Each floor, landing and kitchen adds an alarm.
- Wired or radio-linked
- Radio-interlinked mains alarms avoid running cable between them, which can save time.
How long it takes
Usually half a day to a day, depending on how the cables reach each alarm.
Rules and certificates
In rented homes in England, landlords must fit a smoke alarm on every storey used as living space, and a carbon monoxide alarm in any room with a fixed combustion appliance such as a boiler or log burner (gas cookers excluded). They must repair or replace them once told they are faulty.
Questions people ask
Are battery alarms enough?
Legally, often yes for landlords. Mains-wired, interlinked alarms are more reliable and are the standard in new and rewired homes.
Sources
The figures above come from these published guides, checked in November 2026. They are UK ranges, not quotes or Bolton and Wigan averages. How we price.