PRICE GUIDE · ELECTRICAL · 2026–2027
Smoke & Heat Alarm Installation cost in the UK
£80–£600 per job. Typically £300.
Smoke and heat alarm installation in the UK costs £80–£600 per job, with about £300 typical for an interlinked system in a three-bed home. A single alarm on existing wiring is cheapest; mains-wired interlinked alarms on every floor, and bigger homes, cost more.
- Search and compare — no account needed
- Nearest to you first
- One score from Google, Trustpilot and Locufy reviews
HOW MUCH IT COSTS
How much does smoke & heat alarm installation cost in the UK?
| Low end | £80 | a single alarm on existing wiring |
|---|---|---|
| Typical | £300 | what most people pay |
| High end | £600 | mains-wired interlinked alarms in a large house |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the electricians and electrical firms near you.
What moves the price
- Number of alarms — a single alarm costs far less than interlinked smoke and heat alarms throughout
- Mains or battery — mains-wired alarms need cabling, while sealed radio-linked alarms fit faster
- Interlinking — linking alarms so they all sound together adds cable or radio modules
- Floors and size — three-storey homes need alarms on every level and in more rooms
- Heat alarms — kitchens need heat rather than smoke alarms to avoid false alarms
- Making good — chasing cables between floors leaves plaster to repair
Electrical work prices in the UK are up 6% over five years (ONS Consumer Price Inflation, Services for maintenance and repair, to 2026 August). Five years ago a typical smoke & heat alarm installation would have cost about £140 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What a smoke & heat alarm installation booking includes
Takes: Half a day for most homes, a full day for mains-wired alarms in larger houses. Not included: Carbon monoxide alarms, fire doors and making good plaster after cable runs are usually priced separately — see the related guides below.
WHAT PEOPLE BOOK
Common smoke and heat alarm jobs
KNOW THE PRICE? NOW SEE THE REAL ONES
Smoke & Heat Alarm Installation near you, with prices shown
The electricians and electrical firms that cover your area, nearest first, each with their price and one score from every review. No account needed to look.
Or post the job free and let them come to you.
How to pay less
- Choose sealed radio-interlinked smoke alarms, which avoid chasing cables between floors
- Fit smoke and carbon monoxide alarms in one visit
- Replace all alarms together when they reach the end of their life
Before you book
- Landlords in England are required to fit a smoke alarm on every storey used as living accommodation
- In Scotland, homes need interlinked smoke and heat alarms under the tolerable standard
- Loft conversions and new extensions need mains-wired alarms under the Building Regulations
- Check the date on existing alarms, as most need replacing after about ten years
Smoke & Heat Alarm Installation cost: questions people ask
£80–£600 per job, about £300 typical. A single alarm costs least; mains-wired interlinked alarms in a large house cost the most.
About half a day for most homes, and a full day for mains-wired alarms in larger houses.
In Scotland, yes, for all homes. In England and Wales, new work such as loft conversions needs interlinked mains alarms, and they are recommended everywhere.
Smoke alarms in halls and landings, and a heat alarm in the kitchen. Living rooms often need one too.
Carbon monoxide alarms, fire doors and making good are separate. Ask whether the alarms themselves are included.
They are Locufy guide prices for the UK, read from published UK smoke alarm installation costs — a national range, not a quote. Number of alarms and wiring decide your price.
MORE GUIDES