What's Included in a House Alarm Installation?
A typical Sure Alarms house alarm installation includes a main control panel, a digital keypad, passive infrared (PIR) motion detectors for internal coverage, door and window contacts on primary entry points, an external bell box, and a tamper-protected internal sounder. All systems include a backup battery in case of power failure.
For larger London properties — townhouses, semi-detached and detached homes — we design multi-zone systems that allow independent arming of different areas. For example, you can arm the ground floor at night while moving freely upstairs, a feature particularly useful for families with children or pets.
House Alarm Costs in London
House alarm installation in London typically costs between £300 and £900 for a standard domestic property. The final price depends on the size of your home, the type of system chosen (wired, wireless or smart), and whether 24/7 monitoring is included. We provide a fixed, itemised quotation with no surprises after our free survey.
Replacing an Existing Alarm?
If you have an old or outdated alarm that is no longer supported, we can replace it with a modern system, often reusing existing cabling to keep disruption to a minimum. We also offer takeovers of competitor-installed alarms — meaning we can adopt your existing system for maintenance and monitoring without requiring a full reinstall.
Get a Free House Alarm Survey
We cover all London boroughs. No obligation, free survey and quotation.