Smoke alarms
Hard Wired Smoke Alarm Installation in Liverpool
Mains wired smoke and heat alarms, linked so when one goes off they all do. New installs, and replacements for old units that keep beeping or have passed their date.
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- Price
- £90 a swap
- Type
- Mains wired, linked
- Backup
- Battery backup
- For
- Homes and rentals
Who it is for
When to replace or fit smoke alarms
The usual reasons.
A hard wired smoke alarm beeping
Usually the backup battery is low or the alarm has reached the end of its life.
Alarms more than ten years old
Most alarms have a date on the back. Past it, they should be replaced.
Battery alarms only
Mains wired, linked alarms are more reliable and warn the whole house.
False alarms from the kitchen
A heat alarm in the kitchen stops toast setting off the house.
You rent the property out
Landlords in England must have a working smoke alarm on every storey used as living space.
A loft conversion or extension
New living space usually needs mains wired alarms under the Building Regulations.
What is included
What the job includes
The lines on your quote.
What should be on an electrician's quote- 01Layout agreedSmoke alarms in the hall and landings, a heat alarm in the kitchen, and others where needed.
- 02Mains wired alarmsAlarms wired to the mains with battery backup.
- 03InterlinkedAll alarms linked, wired or by radio, so one triggers them all.
- 04Old alarms removedOld units taken down and away.
- 05TestedEvery alarm tested, and the link between them checked.
- 06PaperworkDetails of what was fitted, useful for landlords' records.
How it runs
How it goes
Usually a short visit.
- BeforePhotos and a priceTell Harry the number of floors and send photos of any existing alarms.
- MorningOld units offOld alarms removed and the circuit isolated.
- AfternoonNew alarms inNew alarms fitted, linked and tested.
- AfterShown how to testYou are shown how to test and silence them.
Price guide
What smoke alarms cost
Depends on the number of alarms and whether there is already a mains supply to them.
| Job | What it covers | Guide price |
|---|---|---|
| Replace an existing mains alarm | Like-for-like swap on the existing wiring | £90 each |
| New mains wired system | New wiring, linked smoke and heat alarms | Quoted on the visit |
These are Harry's own starting prices. Every home is different, so Harry looks at the job and confirms a fixed price before any work starts. Quotes are free, and nothing is booked until you have agreed the price.
Harry's work
Recent jobs by Harry
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Fuse board Fuse box replacement · Sep 2026 Old wire fuses out, RCBO board in Rewireable fuses · RCBO board + surge protection -
Kitchen Kitchen electrics · Aug 2026 Under-cabinet and plinth lighting Under-cabinet + plinth · Splashback doubles -
EV charger EV charger installation · Aug 2026 Ohme Home Pro on a red-brick wall Ohme Home Pro · Brick wall + holster
Questions
Questions about
smoke alarms
Not sure what you need? Send Harry a photo and he will tell you.
WhatsApp HarryWhy is my hard wired smoke alarm beeping?
A single chirp every so often usually means the backup battery is low or the alarm has reached the end of its life. Check the date on the back. If it is past it, the alarm needs replacing.
Why does my smoke alarm keep beeping after changing the battery?
Some alarms need resetting after a battery change, and some beep because the whole unit has expired. Hold the test button to reset. If it carries on, replace it.
Do landlords need hard wired smoke alarms?
Landlords in England must have at least one working smoke alarm on every storey used as living space, and a carbon monoxide alarm in rooms with a fixed combustion appliance (not gas cookers). The law does not say they must be hard wired, but mains linked alarms are more reliable.
How long do smoke alarms last?
Most are made to last about ten years. The expiry date is printed on the back.
Where should smoke alarms go?
In the hall and on every landing as a minimum, with a heat alarm in the kitchen. Harry suggests a layout for your house.
Areas covered
Smoke alarms across Liverpool and Merseyside
Harry is based in Halewood and covers Liverpool, Halewood, Huyton, Widnes, Runcorn, St Helens, Kirkby, Bootle, Crosby, Maghull, Formby and Ormskirk. Not sure if you are in range? Send your postcode on WhatsApp.
Free quote
Want a fixed price on your smoke alarms?
- Call
- 07788 861536
- 07788 861536
- Based
- Halewood, Liverpool L26