PRICE GUIDE · ELECTRICAL · 2026–2027
Carbon Monoxide Alarm cost in the UK
£50–£200 per job. Typically £70.
Having a carbon monoxide alarm fitted in the UK costs £50–£200, with about £70 typical. A battery alarm screwed to the wall is cheapest; a mains-wired or interlinked alarm needs an electrician, and London and the South East cost the most.
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HOW MUCH IT COSTS
How much does a carbon monoxide alarm cost in the UK?
| Low end | £50 | a sealed battery alarm outside London |
|---|---|---|
| Typical | £70 | what most people pay |
| High end | £200 | a mains-wired alarm in London |
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
- Battery or mains-wired — a sealed battery alarm is quick to fit, while a hard-wired alarm needs an electrician
- Interlinked alarms — linking the carbon monoxide alarm to smoke alarms adds wiring or wireless modules
- Number of alarms — each room with a gas or solid fuel appliance needs its own alarm
- Smart features — carbon monoxide alarms with app alerts and voice warnings cost more
- Region — carbon monoxide alarm fitting in London and the South East costs more
- Combined visit — fitting the alarm during a boiler service or stove install saves a call-out
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 carbon monoxide alarm would have cost about £85 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What a carbon monoxide alarm booking includes
Takes: Under an hour for a battery alarm, one to two hours for a mains-wired alarm. Not included: Servicing or repairing the gas boiler, fire or stove, and a full smoke alarm system are priced separately — see the related guides below.
WHAT PEOPLE BOOK
Common carbon monoxide alarm jobs
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Carbon Monoxide Alarm near you, with prices shown
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How to pay less
- Choose a sealed ten-year battery carbon monoxide alarm, which needs no wiring
- Have the alarm fitted during a boiler service or stove installation to avoid a separate visit
- Fit several carbon monoxide alarms in one visit if you have more than one appliance
Before you book
- In England, landlords need a carbon monoxide alarm wherever a fixed combustion appliance is used, gas cookers excepted
- A carbon monoxide alarm is required with any new solid fuel appliance under the Building Regulations
- Choose an alarm marked to the British and European standard for CO alarms
- Test the alarm regularly and replace it by the date on the label
Carbon Monoxide Alarm cost: questions people ask
£50–£200 per job, about £70 typical. A battery alarm outside London costs least; a mains-wired alarm in London costs the most.
Under an hour for a battery alarm and one to two hours for a mains-wired one.
Yes. In England, landlords need a CO alarm wherever a fixed combustion appliance such as a boiler or stove is used, gas cookers excepted, and must repair or replace alarms reported as faulty.
In the same room as the appliance, usually on the ceiling or high on a wall, following the maker's distance guidance.
Servicing the boiler or stove and a full smoke alarm system are separate. Ask whether the alarm unit is included.
They are Locufy guide prices for the UK, read from published UK carbon monoxide alarm costs — a national range, not a quote. Alarm type and region set your price.
MORE GUIDES