Fire Alarm Commissioning & Servicing in London
Installing a fire alarm is only part of the job. Before a system is handed over, it must be commissioned to prove it works as designed, and once in use it needs regular servicing to stay reliable.
We provide fire alarm commissioning and servicing for both domestic and commercial properties across London, in line with BS 5839. As well as systems we have installed, we can often take over systems fitted by other contractors.
About the service
Commissioning is the full test of a new or modified system before handover. Servicing is the regular inspection and testing that keeps it working afterwards. Both are carried out by engineers qualified in BS 5839-1 and BS 5839-6.
Our fire alarm commissioning includes:
- Testing every detector, sounder and manual call point
- Checking the control panel, zones and fault signals
- Checking sounder levels and standby battery capacity
- Confirming the installed system matches the design
- Issuing commissioning certificates and handover documents
- Showing you how to use the system and record tests
Commissioning & Servicing for Homes (BS 5839-6)
Domestic fire alarm systems should be tested and maintained in line with BS 5839-6. For landlords and HMO managers, keeping a record of testing and servicing helps show that the system is being properly looked after.
We commission and service fire alarm systems in:
- Houses and flats
- HMOs and shared houses
- Landlord and rental properties
- Sheltered and supported housing
Commissioning & Servicing for Businesses (BS 5839-1)
For non-domestic premises, BS 5839-1:2025 recommends that the system is inspected and serviced by a competent person at intervals of no more than six months, with a weekly test carried out by the user. We offer fire alarm servicing contracts that keep your system compliant and your logbook up to date.
We commission and service commercial systems in:
- Offices and workspaces
- Shops and retail units
- Restaurants, cafés and drive-throughs
- Warehouses and industrial units
- Communal areas of blocks of flats
For the latest changes to the standard, see BSI’s guide to BS 5839-1:2025.
When Do You Need Commissioning or Servicing?
- A new fire alarm system has just been installed
- An existing system has been extended or modified
- Your commercial system has not been serviced in the last six months
- The panel is showing faults or the system gives false alarms
- You have taken over a building with no service records
- Your fire risk assessor or insurer asks for proof of maintenance
For your legal duties as a business owner or building manager, see the GOV.UK guidance on fire safety in the workplace and the London Fire Brigade’s fire risk assessment guidance.
Why Choose Us
- Engineers qualified in BS 5839-1 and BS 5839-6
- Commissioning and servicing for homes and businesses
- Clear certificates and logbook entries after every visit
- Prompt fault finding and repairs
- Servicing contracts to suit your building
- NAPIT-accredited (Membership No. 65117)
Areas We Cover
We provide fire alarm commissioning and servicing across North London, North West London, West London and South West London, including N, NW, W and SW postcode areas. If your area is not listed below, please contact us to confirm availability.
- North London: N1 – (Islington, Hoxton), N2 – (East Finchley), N3 – (Finchley Central), N4 – (Finsbury Park), N5 – (Highbury), N6 – (Highgate), N7 – (Holloway), N8 – (Crouch End, Hornsey), N9 – (Lower Edmonton), N10 – (Muswell Hill), N11 – (Friern Barnet, New Southgate), N12 – (North Finchley), N13 – (Palmers Green), N14 – (Southgate), N15 – (Seven Sisters), N16 – (Stoke Newington), N17 – (Tottenham), N18 – (Upper Edmonton), N19 – (Archway, Tufnell Park), N20 – (Whetstone), N21 – (Winchmore Hill), N22 – (Wood Green).
- North West London: NW1 – (Camden, Regent’s Park), NW2 – (Cricklewood, Neasden), NW3 – (Hampstead, Belsize Park), NW4 – (Hendon, Brent Cross), NW5 – Kentish Town, NW6 – (Kilburn, Queen’s Park), NW7 – Mill Hill, NW8 – St John’s Wood, NW9 – (Colindale, Kingsbury), NW10 – (Willesden, Harlesden), NW11 – (Golders Green, Hampstead Garden Suburb).
- West London: W1 – (Mayfair, Soho, Marylebone), W2 – (Paddington, Bayswater), W3 – (Acton), W4 – (Chiswick), W5 – (Ealing), W6 – (Hammersmith), W7 – (Hanwell), W8 – (Kensington), W9 – (Maida Vale, Little Venice), W10 – (Ladbroke Grove, North Kensington), W11 – (Notting Hill), W12 – (Shepherd’s Bush), W13 – (West Ealing), W14 – (West Kensington).
- South West London: SW1 – (Westminster, Victoria), SW2 – (Brixton), SW3 – (Chelsea), SW4 – (Clapham), SW5 – (Earl’s Court), SW6 – (Fulham), SW7 – (South Kensington), SW8 – (Vauxhall), SW9 – (Stockwell), SW10 – (West Brompton), SW11 – (Battersea), SW12 – (Balham), SW13 – (Barnes), SW14 – (Mortlake, East Sheen), SW15 – (Putney, Roehampton), SW16 – (Streatham), SW17 – (Tooting), SW18 – (Wandsworth), SW19 – (Wimbledon), SW20 – (Raynes Park, South Wimbledon).
Frequently Asked Questions (FAQ)
What is fire alarm commissioning?
Commissioning is the full test of a new or modified fire alarm system before it is handed over. It confirms the system works correctly and matches the design, and it is recorded on a commissioning certificate in line with BS 5839.
How often should a fire alarm be serviced?
For commercial premises, BS 5839-1 recommends servicing by a competent person at intervals of no more than six months. Domestic systems should be tested and maintained in line with BS 5839-6, and how often depends on the type of system.
Do I need to test my fire alarm between services?
Yes. In commercial premises, a weekly test using a different manual call point each time is recommended, with results recorded in the logbook. At home, test your smoke alarms regularly using the test button.
Can you service a system installed by another company?
In most cases, yes. We will inspect the system first and let you know if anything needs attention before we take it on.
What happens if faults are found?
We explain the problem, give you a quote for any repairs and record the findings on your certificate or logbook.
Will I receive a certificate?
Yes. We issue a commissioning certificate for new or modified systems and an inspection and servicing certificate after each service, in line with BS 5839.
Book fire alarm commissioning or servicing with us
We are NAPIT-accredited electricians providing fire alarm commissioning and servicing for homes and businesses across all London boroughs. Whether you need a new system commissioned before handover or a regular service to keep an existing system compliant, our engineers work in line with BS 5839 and issue certificates after every visit.
Contact us to book your fire alarm commissioning or servicing, or to discuss your requirements.
Fill in the form below with your details and a brief description of your requirements and we will get back to you within 12 hours.
