Old alarm?
We bring it up to date.
Bell-only box, unsupported panel, or a system the original installer abandoned? SatFocus upgrades intruder alarms of any make to a modern, app-controlled wireless system — across London and the home counties.
Due an upgrade?
- Siren sounds but no phone alert
- Frequent false alarms or faults
- Panel no longer supported
- No remote arming from your phone
- Original installer has gone
- Switching wired to wireless
An intruder alarm upgrade replaces or modernises an existing burglar alarm — any make, any age — with a current wireless system: smartphone control, real-time alerts, video verification and encrypted, optionally monitored communication. We cover London and the home counties, usually in a single day.
What does an upgrade actually involve?
It ranges from swapping an obsolete control panel and keypad while keeping sound detectors, through to a full wire-free replacement. We assess what you’ve got first, then recommend the most cost-effective route — you don’t always need to start from scratch.
Older “bell-only” systems sound a siren but tell you nothing. A modern upgrade adds app notifications, remote arm/disarm, activity history and optional 24/7 monitoring through an Alarm Receiving Centre — so you always know what’s happening, home or away.
Why SatFocus?
We’ve upgraded thousands of systems since 2015 and work with every major platform, so we’re brand-independent — we fit the right upgrade for your property and budget, not whatever we happen to stock. Checkatrade-verified and Which? Trusted Trader, covering London and the surrounding counties end to end.
Six signs your alarm is overdue
If your system does any of the following, it’s working against you rather than for you.
It’s bell-only
The siren sounds but you get no call, text or app alert — you only know if a neighbour tells you.
Recurring false alarms
Ageing detectors and worn contacts cause nuisance triggers that erode confidence and annoy neighbours.
Panel unsupported
Spares discontinued, installer stopped trading, or no engineer will touch the old board.
No remote control
You can’t arm, disarm or check status from your phone — everything depends on the keypad.
Dead or dying battery
Constant low-battery beeps, or a system that fails the moment the mains drops.
Selling or insuring
A buyer, tenant or insurer wants a current, certificated system, not a legacy box.
What an upgrade changes
The same property, the same walls — a completely different level of protection and control.
- Siren only — no notification
- Keypad on site to arm/disarm
- No way to verify a trigger
- Old phone line or nothing
- False-alarm-prone detectors
- Wired, hard to expand
- Instant app, SMS & push alerts
- Arm / disarm anywhere via app
- Photo or video on activation
- Wi-Fi, 4G & cloud, encrypted
- Pet-immune, supervised devices
- Add devices wirelessly any time
Brands we upgrade — from and to
We’re independent. We upgrade away from any legacy system and install whichever modern platform best suits your property.
Your upgrade in four steps
A clean, single-day changeover on most domestic systems, with minimal disruption.
Free survey
We assess your existing system and what’s worth keeping versus replacing.
Fixed quote
A clear written proposal — no surprises, no pressure, 30-day validity.
Changeover
Clean removal of the old, installation of the new — usually in a day.
Setup & handover
App configured, system tested, you’re trained, 12-month warranty.
London & the home counties
Based in Harrow, covering Greater London and the surrounding counties. A selection of areas we serve:
HillingdonHounslowRichmondKingston
MertonWandsworthHammersmith & FulhamWestminster
Kensington & ChelseaCamdenIslingtonHackney
HaringeyEnfieldNewhamRedbridge
Waltham ForestHaveringTower HamletsSouthwark
LambethLewishamGreenwichCroydon
SuttonWatford (Herts)St Albans (Herts)Hemel Hempstead (Herts)
Slough (Berks)Maidenhead (Berks)Uxbridge (Mdx)Amersham (Bucks)
High Wycombe (Bucks)Guildford (Surrey)Woking (Surrey)Epsom (Surrey)
Romford (Essex)Brentwood (Essex)Dartford (Kent)Bromley (Kent)
Alarm upgrade FAQs
Can you upgrade my alarm if the original installer has gone?
Do I have to replace the whole system?
How long does an upgrade take?
Will a new system reduce false alarms?
Can the upgraded alarm be monitored?
Which areas do you cover for upgrades?
Request your free upgrade survey
Fill in the form, or scan the code with your phone to complete it on the go — wherever you are.
Bring your alarm up to date
Whatever make or age your current system, we’ll modernise it — app control, real-time alerts and dependable protection. Book your free, no-obligation upgrade survey across London and the home counties.