Updated 25 September 2026
Interlinked smoke alarms cost UK 2026
The going rate for interlinked smoke alarms in 2026 is £60–£120/alarm (total, ex VAT). Below: a calculator, what the job involves, materials at three price levels, and the prep that changes the price.
Market band£60–£120/alarm
Worked example, 3 alarm£320
Time on site4 h
Interlinked smoke alarms calculator
Price a real job freeUses your rates, your speed and your receipts.
Market band source: Trade2Base.
What the job involves
| Stage | Task | Typical time |
|---|---|---|
| work | Set out and test | 1 h |
| work | Fit and interlink alarm | 0.75 h per alarm |
Materials at three price levels
| Material | Budget | Trade choice | Premium |
|---|---|---|---|
| Mains interlinked smoke or heat alarm each | £18 Mains optical alarm with battery backup — Compliant basic | £28 Branded interlinked alarm, 10-year cell — No battery changes | £45 Radio-interlinked with app — No cables between alarms |
Trade prices ex VAT, estimates checked 2026-09-25. Log your receipts in Grafto and your own prices replace these.
What changes the price
- Rented? owner occupied · private rental · HMO
Good practice
- Rentals (England): EICR every 5 years, C1/C2 fixed within 28 days
Prep to look for
| Condition | Check | Effect |
|---|---|---|
| Battery-only alarms | battery smoke alarms only | Battery-only alarms: offer an interlinked upgrade (mandatory in Scotland) |
| Possible asbestos (Artex) | textured swirl ceiling where downlights or cables go | Textured ceiling: test for asbestos before cutting |
Questions
How much does interlinked smoke alarms cost in the UK in 2026?
The researched market band is £60–£120/alarm (total, ex VAT), from Trade2Base. A worked example of 3 alarm comes to about £280–£388 across budget, trade and premium materials.
How long does interlinked smoke alarms take?
The worked example of 3 alarm takes about 4 hours.
What changes the price of interlinked smoke alarms?
Mainly size and access, plus any prep found on site: battery-only alarms, possible asbestos (artex).