HOW TO HIRE · ELECTRICAL

How to hire a smoke alarm installer in the UK
The checks, the questions and the paperwork.

Alarm law differs by nation: interlinked in every Scottish home, mains-wired in Welsh rentals, a minimum for English landlords. The rules, checks and paperwork.

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THE 60-SECOND VERSION

Hiring a smoke alarm installer in five steps

  1. Know your nation's ruleScotland: every home. Wales: rented homes, mains-wired and interlinked. England: a smoke alarm on each storey of a rented home.
  2. Count the roomsLiving room, every hallway and landing, and a heat alarm in the kitchen is the Scottish pattern.
  3. Mains-wired or sealed radio-linked?Both can interlink; mains wiring is electrical work and needs testing.
  4. Check the register for wired alarmsIn England and Wales, search the business on the Registered Competent Person Electrical register.
  5. Test every alarm togetherOne test button should set off the lot before the installer leaves.

BEFORE YOU BOOK

Check before you book

Registered Competent Person Electrical

In England and Wales, wiring alarms into an existing circuit is not notifiable unless it is near a bath or shower, and in Wales in a kitchen; a new circuit for the alarms is. Should any part of the alarm installation be notifiable, the simplest route is an electrician on an authorised competent person scheme such as NICEIC or NAPIT, who self-certifies it; the alternative is notifying building control in advance and paying for its inspection. Ask who insures the trader doing the alarm installation and for how much; public liability is standard. The Consumer Rights Act 2015 covers the alarm installation when the provider is a trader, and a contract made off-premises or online can usually be cancelled within 14 days under the Consumer Contracts Regulations 2013 — less what was done if you asked for an early start, and not at all for goods made to your specification.

Type the business name into the register's search before the alarm installation is booked. Get a copy of the insurance before the alarm installation starts, and check the profile for the ID-checked and trader badges. electricalcompetentperson.co.uk →

Scotland: interlinked alarms in every home

The Scottish Government says every home must have interlinked fire alarms: a smoke alarm in the main living room (or whichever room is used most), one in every hallway and landing, and a heat alarm in the kitchen, all on the ceiling. The property owner is responsible; mains-wired alarms are electrical work and should come with a test certificate.

In Scotland, ask the installer to confirm the alarm installation meets each of those positions. gov.scot →

Landlord alarm rules (England and Wales)

In England the 2015 Regulations require a smoke alarm on each storey with living accommodation in a rented home, checked on the day a new tenancy starts. In Wales the 2022 fitness for habitation Regulations require a smoke alarm on each storey, connected to the mains and linked to every other mains alarm.

If you let the home, ask for the alarms to meet the rule for your nation and keep a dated record. legislation.gov.uk →

Electrical Installation Certificate

When the alarm installation is wired from the mains it is tested to BS 7671 and recorded on a Minor Works Certificate, or an Electrical Installation Certificate for a new circuit. Where the alarm installation is notifiable, a Building Regulations compliance certificate follows from the scheme — within 8 weeks in England according to gov.uk, and arranged within 30 days in Wales according to the Welsh Government.

Ask for the certificate, with the test results filled in, on the day the alarm installation is finished. gov.wales →

VAT

VAT on supplying and fitting smoke and heat alarms is charged at the standard 20%, and any business turning over more than £90,000 a year in taxable sales has to register, add it to the price and set it out on its own line.

Ask for the VAT number, and look for VAT as its own line on the alarm quote. gov.uk →

“Which alarms go where?”

A good answer: A room-by-room list: smoke alarms in living areas, hallways and landings, a heat alarm in the kitchen — matched to your nation's rule.

“Mains-wired or sealed radio-linked alarms?”

A good answer: Both explained. In Wales a landlord needs mains-connected alarms; in Scotland either type can meet the interlinked rule.

“Will every alarm be interlinked?”

A good answer: Yes — one triggered alarm sets off all of them, tested in front of you.

“Do the alarms meet the British standards for smoke and heat alarms?”

A good answer: Yes, with the model named on the invoice.

“Will you test the circuit and certify the wired alarms?”

A good answer: A Minor Works Certificate for a connection to an existing circuit, or an Electrical Installation Certificate for a new one.

“When do the alarms need replacing?”

A good answer: A date on each alarm and on the invoice; many last around ten years.

“Is there asbestos in the ceiling?”

A good answer: For an older textured ceiling, a check before drilling; the Scottish Government's own alarm guidance raises it.

Getting the quote right

  • Each alarm by type, model and room
  • Interlinking method — wired or radio
  • Wiring, a fused spur or new circuit if needed, and certification
  • Removal of old alarms and making good
  • Who actually attends — the electrician fitting and interlinking the alarms, employed or subcontracted — and the business's VAT number, with VAT at 20% shown as its own line

Walk away if

  • Alarms not interlinked in a Scottish home
  • A smoke alarm in the kitchen instead of a heat alarm
  • Battery-only alarms for a Welsh rental that needs mains-connected ones
  • No test of the interlink before leaving
  • Mains-wired alarms with no certificate
LOW
£80
TYPICAL
£300
HIGH
£600

What a smoke alarm installer costs: £80–£600 per job

Smoke and heat alarm installation is priced per job, by the number of alarms and whether they are mains-wired or radio-linked; chasing cable between floors adds making good. Smoke & Heat Alarm Installation price guide →

Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.

KNOW WHAT TO LOOK FOR? NOW FIND ONE

Smoke alarm installers near you, with the badges that matter shown

ID checked, trader status and one score from every review — on the card, before you message anyone. Nearest first. No account needed to look.

Or post the job free and let them come to you.

  1. Plan the positionsThe installer maps each room against your nation's rule and the ceiling layout.
  2. IsolateFor mains alarms, the lighting or alarm circuit is isolated and proved dead.
  3. FitBases fixed to ceilings, cables or radio modules connected, alarms mounted.
  4. Test the interlinkEach alarm tested and seen to trigger every other one; the circuit tested if wired.
  5. Record and hand overA room-by-room list, replace-by dates and any certificate.

Interlinked
Alarms connected so that when one goes off, they all do.
Heat alarm
An alarm triggered by a rise in temperature, used in kitchens.
Mains-wired
An alarm powered from the home's electrical supply, with a battery backup.
Radio-linked
Alarms that interlink wirelessly rather than by cable.
Storey
A floor of the home; England's and Wales's landlord rules count alarms per storey.
Minor Works Certificate
The certificate for connecting alarms to an existing circuit.

AFTER

When the job is done

Keep the record and certificateThe alarm models, the rooms, the replace-by dates and any Minor Works Certificate; landlords keep the check made on the day a tenancy starts.
Test them monthlyPress one test button and listen for all of them.
Do not paint over themPaint and dust block sensors; vacuum the vents and replace by the date shown.
Leave the reviewOnly booked jobs can be reviewed on Locufy, so yours carries weight; if the alarm installation falls short, use the make-it-right step first and the provider is asked to fix it before the review is published.

STEP 1Complain to the electrician firstEmail or message so there is a record, setting out the defect in the alarm installation and what you expect. A trader owes reasonable care and skill under the Consumer Rights Act 2015; the remedies it sets are a second attempt, then a price reduction.
STEP 2Use Locufy's make-it-right stepRate the alarm installation under four stars and you are asked whether to send it to the provider first; we follow it through. Then the review goes up.
STEP 3Unsafe or uncertified workWhere the alarm installation needed self-certifying or notifying in England or Wales and neither happened, building control at the council is the place to go; if only the compliance certificate is missing, ask the electrician's scheme to follow it up. For a dispute about the alarm installation with the trader, Trading Standards is reached through the Citizens Advice consumer helpline on 0808 223 1133 in England and Wales, Advice Direct Scotland on 0808 800 9060, or Consumerline on 0300 123 6262 in Northern Ireland.
STEP 4Money still in disputeIf the alarm installation is still not settled, you can claim without a solicitor: the small claims track takes claims up to £10,000 in England and Wales, simple procedure up to £5,000 in Scotland, and the small claims court up to £5,000 in Northern Ireland.

Hiring a smoke alarm installer: questions people ask

No licence applies to fitting alarms. Mains-wired alarms are electrical work: a connection to an existing circuit is usually not notifiable in England, but a new circuit is notifiable in England and Wales.

Every home must have interlinked alarms: a smoke alarm in the main living room, one in every hallway and landing, and a heat alarm in the kitchen. The owner is responsible.

£80–£600 a job, typically around £300. The number of alarms and mains wiring drive the price. For what is usually included, read the Smoke & Heat Alarm Installation price guide; enter a postcode above to compare smoke alarm installers locally.

A smoke alarm on each storey with living accommodation, and a carbon monoxide alarm in rooms with a fixed fuel-burning appliance (gas cookers excepted), checked on the day a new tenancy begins.

A smoke alarm on each storey that is connected to the mains and linked to every other mains alarm, plus a carbon monoxide alarm in each room with a gas, oil-fired or solid fuel appliance.

For mains-wired alarms, a Minor Works Certificate or an Electrical Installation Certificate; for any alarm, a dated list of models and positions.

MORE GUIDES

More hiring guides in electrical

How to hire: Carbon Monoxide AlarmHow to hire: ElectricianHow to hire: Electrical Safety Inspection (EICR)How to hire: Full RewiringHow to hire: Burglar Alarm InstallationHow to hire: Lighting InstallationHow to hire: PAT TestingHow to hire: Partial RewiringAll 701 hiring guides →

Smoke alarm installers near you

Smoke alarm installers in LondonSmoke alarm installers in ManchesterSmoke alarm installers in BirminghamSmoke alarm installers in GlasgowSmoke alarm installers in BelfastAll smoke alarm installers on Locufy →

Sources — checked October 2026

  1. gov.uk — Approved Document P: electrical safety in dwellings (England)
  2. Registered Competent Person Electrical register
  3. gov.uk — building work, replacements and repairs to your home (England)
  4. gov.wales — building regulations: electrics
  5. gov.scot — Building Standards Technical Handbook 2022 (domestic), standard 4.5 electrical safety
  6. gov.scot — fire and smoke alarms: the law
  7. Smoke and Carbon Monoxide Alarm (England) Regulations 2015, regulation 4
  8. Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022, regulation 5 — smoke and carbon monoxide alarms
  9. gov.uk — building regulations: when you do not need approval
  10. Consumer Rights Act 2015, section 49 — reasonable care and skill
  11. Consumer Rights Act 2015, section 54 — what you can ask for when a service falls short
  12. Consumer Contracts Regulations 2013, regulation 30 — the 14-day cancellation period
  13. Consumer Contracts Regulations 2013, regulation 28 — contracts the cancellation right does not cover
  14. Consumer Contracts Regulations 2013, regulation 36 — services started within the cancellation period
  15. Civil Procedure Rules Part 26 — the small claims track limit (England and Wales)
  16. Scottish Courts and Tribunals — making a claim under simple procedure
  17. nidirect — the small claims process (Northern Ireland)
  18. Buildings and construction (VAT Notice 708) — 2.1 Construction services: work to an existing building is normally standard-rated
  19. GOV.UK — VAT rates
  20. GOV.UK — Register for VAT: when to register