Smoke Alarm Installation Cost
£25–£300per-alarm range. Last updated August 2026.
Published installation estimates range from £25–£75 for a battery alarm to £150–£250 for a wired alarm and £175–£300 for an app-enabled alarm. Electricians who do smoke alarm installations
What each option costs
| Type | Typical cost | Notes |
|---|---|---|
| Battery-powered alarm | £25–£75 | Per alarm |
| Wired alarm | £150–£250 | Per alarm |
| App-enabled alarm | £175–£300 | Per alarm |
What affects the price
- Alarm type and count
- Existing wiring or a new circuit
- Ceiling access and interlinking
- Property layout and required alarm coverage
What’s included
- The alarm and installation for the stated type
- Testing and setup for the agreed scope
Good to know
How long does it take? A single alarm can be quick; multiple wired and interlinked alarms take longer.
Do I need one? Alarm duties depend on the UK nation, tenure, building use, and risk assessment; fixed wiring alone is not automatically notifiable electrical work in England.
Before you book, read how to check an electrician is qualified.
How to pay less
- Agree the alarm grade and power type before quoting
- Install several alarms together
- Confirm batteries, interlinking, certification, and making good
