Cost Breakdown
| Item | Min | Max | Note |
|---|---|---|---|
| Small system (up to 10 devices — HMO or small office) | £150 | £220 | Typically a conventional system with a few smoke detectors, heat detectors, and manual call points; 1-2 hours on site |
| Medium system (10-30 devices — medium office or retail) | £220 | £350 | May be conventional or addressable; includes multiple zones, sounders, and possibly a fire door release system; 2-3 hours |
| Large system (30-100 devices — large commercial or residential block) | £350 | £500 | Typically an addressable system with multiple loops, cause-and-effect programming, and integration with other fire safety systems; half to full day |
| Annual maintenance contract (2 visits per year) | £250 | £800 | Contracts covering both six-monthly services are typically 10-20% cheaper than booking individual visits |
| Replacement detector or call point (per device) | £15 | £80 | Conventional detectors cost £15-£30 each; addressable devices cost £40-£80. Labour for replacement is usually included in the service visit |
| Emergency call-out for fault or false alarm | £80 | £200 | For call-outs outside the regular service schedule; some maintenance contracts include a number of emergency call-outs per year |
What's Included
- Visual inspection of every device on the system: smoke detectors, heat detectors, manual call points, sounders, beacons, and the fire alarm control panel
- Functional testing of a proportion of detectors and all manual call points to confirm they trigger the correct alarm response (BS 5839-1 requires all devices to be tested over a 12-month cycle across the two six-monthly visits)
- Sensitivity testing of smoke detectors using calibrated test equipment to ensure they operate within the correct parameters and have not drifted due to contamination
- Battery backup testing: checking that the standby batteries can power the system for the required duration (24 hours standby plus 30 minutes alarm for most systems) and replacing batteries approaching end of life
- Panel check: verifying all zone and loop indications, testing fault and alarm outputs, checking communication links to monitoring stations, and clearing any stored fault logs
- A written service report documenting every device checked, any faults found, corrective actions taken, components replaced, and the overall condition of the system with recommendations
Factors Affecting Cost
- Size and type of system — a small conventional system with 6 detectors is far quicker to service than an addressable system with 80+ devices across multiple loops
- Number of devices — each detector, call point, sounder, and ancillary device needs individual inspection and testing during the service visit
- System age — older systems may require more replacement parts, and some legacy systems use proprietary components that are expensive or difficult to source
- Building type and access — high ceilings, restricted access areas, and the need for scaffolding or access equipment increase the time and cost of servicing
- Whether a maintenance contract is in place — annual contracts with two included visits are typically 10-20% cheaper than ad hoc bookings and often include priority emergency response
- Integration with other systems — fire alarm systems that interface with door release mechanisms, damper controls, lift recall systems, or building management systems require additional testing of those interfaces
How Long Does It Take?
A six-monthly service visit for a small system (up to 10 devices) typically takes 1-2 hours. Medium systems (10-30 devices) take 2-4 hours. Large systems (30-100+ devices) can take half a day to a full day. The engineer will need access to every area of the building where fire alarm devices are installed, including locked rooms, above suspended ceilings, and in risers or service voids. The fire alarm will sound during testing — the engineer will coordinate with building management to warn occupants and, where applicable, notify the alarm receiving centre to place the system on test to prevent a false call to the fire service. For large buildings, the service may be split across two visits to minimise disruption.
Do I Need This?
If your premises has a fire alarm system (rather than standalone smoke alarms), regular maintenance is a legal and practical necessity. The Regulatory Reform (Fire Safety) Order 2005 requires the responsible person to ensure that fire safety equipment is maintained in working order. BS 5839-1 (the Code of Practice for fire detection and fire alarm systems in non-domestic premises) specifies a minimum of two service visits per year by a competent person, plus weekly testing by the building's responsible person. Insurance policies for commercial premises, HMOs, and residential blocks almost always require evidence of regular fire alarm maintenance. Your fire risk assessment will also specify the maintenance regime. Failure to maintain the system can result in enforcement action by the fire authority, prosecution, and — most importantly — a system that does not work when it is needed, putting lives at risk.
How to Save Money
Set up an annual maintenance contract covering both six-monthly visits rather than booking them individually — contract rates are typically 10-20% cheaper and often include benefits like priority emergency response
Combine fire alarm maintenance with other building servicing (emergency lighting testing, fire extinguisher servicing, EICR) to consolidate call-out charges and reduce the total number of contractor visits
Ensure weekly testing is being carried out properly by trained staff — this catches faults early and reduces the amount of corrective work needed during the formal service visit
Keep the system's log book up to date with records of all faults, false alarms, and weekly tests. This gives the service engineer a clear picture of the system's condition and reduces diagnostic time
For older systems approaching end of life, get a quote for full replacement alongside the maintenance quote. Modern systems are more reliable, cheaper to maintain, and use less energy — the total cost of ownership over 5-10 years may be lower than continuing to maintain an aging system
Average Cost Summary
£150–£500
Typical price range for fire alarm maintenance cost in the UK. Prices may vary based on your location, property type, and specific requirements.
