Burglar Alarm Upgrade & Replacement
Replace outdated bell-only alarms with smart, app-controlled systems from Texecom, Pyronix, and Ajax. Keep your existing wiring and sensors where compatible — full upgrades typically completed in a single day.
Your Old Alarm Is Costing You Protection
A 10-15 year old burglar alarm is an outdated, bell-only system that simply makes noise — it has no way to alert you, the police, or a monitoring centre. Modern smart alarms are completely different: they push instant notifications to your phone, work with your existing sensors, and integrate with smart home and CCTV systems. Most importantly, they comply with current insurance requirements (BS EN 50131 Grade 2).
If your control panel is from Honeywell Accenta, Veritas, Scantronic 9651, ADE, Eaton CA-22, Optima, or Galaxy 8/16/18, you almost certainly have a system that can be upgraded — keeping the existing cabling and most sensors — for a fraction of the cost of a complete rip-and-replace installation.
Time For An Upgrade
Recognise any of these? Your alarm system is past its useful life and may already be failing to protect you.
Bell-only system
Your alarm just sounds a siren — no smartphone alerts, no monitoring centre dispatch, no remote check-ins.
10+ years old
Sensor lifespans are typically 8-12 years. Battery-backed panels degrade. False alarms become routine.
No app control
You can’t arm, disarm, or check status from your phone — you rely on a wall keypad and four-digit codes.
Insurance pressure
Insurer asking for BS EN 50131 Grade 2 compliance, NSI/SSAIB certification, or signalling-grade equipment.
Frequent false alarms
Pet false-trips, sensor failures, faulty PIRs, or panel “trouble” beeps interrupting daily life.
Discontinued parts
Your installer can’t source replacement keypads, expanders, or external sirens — the brand is end-of-life.
Sold the property
New owners with no codes, no engineer history, no maintenance contract — a complete reset is needed.
What You Lose, What You Gain
A side-by-side of what a 15-year-old alarm gives you versus what a modern smart alarm system delivers.
Old System (e.g. 2010 Accenta G4)
- Local siren only — no remote alerts
- No smartphone control or status checks
- No event log accessible to homeowner
- No integration with CCTV or smart home
- Failing or aged PIR sensors (limited range)
- 4-digit user codes only — no biometrics
- Battery-backed RAM that loses settings
- Often non-compliant with current insurer specs
- Discontinued — no parts or new features
Upgraded Smart System
- Push notifications direct to your phone
- Arm, disarm, and view from anywhere
- Full event history with timestamps in app
- Integrates with Hikvision/Ajax CCTV cameras
- Pet-immune dual-tech PIRs, glass-break, doors
- Wireless keyfobs, NFC tags, app users
- Cloud-synced — no settings ever lost
- BS EN 50131 Grade 2 — insurer-compliant
- Active brand with ongoing firmware updates
The Difference, Side By Side
A real before-and-after of a 2010 Honeywell Accenta replaced with a smart Texecom Premier Elite — same wiring, same sensors, transformed protection.
From Survey to Smart Alarm — In 4 Steps
No high-pressure sales. No confusing jargon. A clear process most homeowners complete in under a week.
Free Survey
We visit, assess your existing system, and check what wiring and sensors can be reused.
Tailored Quote
Three transparent options — Essential, Recommended, Premium — with no hidden fees.
1-Day Install
Most upgrades complete in a single day. New panel, keypad, siren, communicator. Existing cables retained.
App Setup
Full smartphone setup, user training, and a 12-month warranty. Annual service available.
Three Upgrade Tiers
Every quote is custom — these are typical starting prices for a standard 3-bed home with existing sensors. We always confirm exact pricing on-site after the free survey.
- New control panel
- New keypad
- Re-use external / internal sounder & siren
- Re-use existing wired sensors (up to 8)
- Programming & commissioning
- 12-month parts & labour warranty
- BS EN 50131 Grade 2 compliant
Best for: working systems where only the panel/keypad need replacing.
- Everything in Essential, plus:
- Smartphone app (push alerts)
- Wi-Fi/LAN communicator module
- 12-month warranty
- BS EN 50131 Grade 2 compliant
Best for: homes wanting full smart features with insurance compliance.
- Everything in Recommended, plus:
- New External siren with strobe
- New PIR Sensors x 4
- New Door Sensor x 2
- 12-month warranty
- BS EN 50131 Grade 2 compliant
Best for: larger homes, listed buildings, or full wireless conversions.
All prices indicative. Final quote provided after free survey. Larger properties, multi-zone systems, and commercial premises priced separately.
Choose The Right Brand For You
SatFocus is an authorised installer for the UK’s leading alarm brands. Each has different strengths — we recommend based on your property, budget, and how much you want to retain from the old system.
Texecom Premier Elite
Industry-leading wired panels with the SmartCom 4G module and Texecom Connect app. Ideal upgrade where existing wiring exists.
See Texecom packages →
Pyronix Enforcer
Excellent hybrid systems with HomeControl+ app, IP/PSTN/4G signalling, and seamless add-on of wireless devices to existing wired loops.
See Pyronix packages →
Ajax Systems
Award-winning fully wireless system. Beautiful design, 7-year battery life, instant photo verification on alarm. Industry-leading reliability.
See Ajax systems →
Visonic PowerMaster
Mature wireless platform from Johnson Controls. Reliable, well-supported, smartphone control via PowerManage. Strong choice for retrofits.
See Visonic systems →Burglar Alarm Upgrade FAQs
How much does a burglar alarm upgrade cost in London?
Can I keep my existing wired sensors?
Will the upgrade work with my insurance?
How long does the upgrade take?
Do you take over alarms installed by other companies?
What’s the difference between wired, wireless, and hybrid?
Can I monitor my alarm from my phone?
What about monitored alarms that call the police?
Do you install commercial alarm upgrades?
Do you offer alarm servicing after the upgrade?
Burglar Alarm Upgrades Across London
Local engineers covering every London borough. Most jobs scheduled within 5 working days of survey approval.
Free Survey · No Obligation Quote
Most upgrades complete in a single day. Same-week installation available. Speak directly to Thiru, our founder, not a call centre.