A burglar alarm is an electronic detection system designed to alert property owners and, in some cases, a monitoring centre when unauthorised entry is attempted. In the UK, a professionally installed burglar alarm typically costs between £450 and £2,500 for a domestic property, depending on the system type, number of detectors, and whether ongoing monitoring is included.
This guide breaks down the real costs you can expect in 2026, based on our experience installing alarm systems across Essex and Greater London since 2011.
Types of Burglar Alarm and What They Cost
There are three main categories of burglar alarm system available in the UK. Each offers a different level of protection, and the cost reflects that.
Bell-Only Systems
A bell-only alarm sounds an external siren when triggered. It relies on the noise deterring the intruder and alerting neighbours or passers-by. There is no automatic notification to you or to a monitoring centre.
- Typical cost: £350 to £600 installed
- Best for: low-risk properties, budget-conscious homeowners, or as a visible deterrent
- Limitations: no remote notification, relies on someone hearing the siren, no police response
Bell-only systems are the most affordable option, but they offer the least protection. If your property is in a rural or isolated location, a bell-only system may not be sufficient.
Speech Dialler Systems
A speech dialler alarm includes all the features of a bell-only system, plus it automatically calls one or more phone numbers when triggered. The system plays a pre-recorded message telling you which zone has been activated.
- Typical cost: £450 to £800 installed
- Best for: homeowners who want personal notification without monthly monitoring fees
- Limitations: no professional monitoring, you need to respond yourself, relies on a phone line or SIM connection
Modern speech dialler systems can use a SIM card rather than a landline, which is worth considering given BT's planned PSTN switch-off (the transition from traditional copper phone lines to digital services, expected to complete by January 2027).
Monitored Alarm Systems
A monitored alarm is connected to an Alarm Receiving Centre (ARC) staffed 24 hours a day, 365 days a year. When the alarm triggers, the ARC verifies the activation and can dispatch keyholders or, where the system meets the required standards, request a police response.
- Typical cost: £600 to £2,500 installed, plus £180 to £480 per year for monitoring
- Best for: higher-value properties, homes left unoccupied for extended periods, insurance compliance
- Key advantage: eligible for police response under the URN (Unique Reference Number) scheme when installed by an inspectorate-approved company such as an SSAIB or NSI member
Monitored systems are the gold standard for home security. Many insurance policies require a monitored alarm for higher-value properties, and the annual monitoring cost is often offset by reduced insurance premiums.
What Affects the Price of a Burglar Alarm?
The headline price of a system is only part of the picture. Several factors influence the total cost:
Number of Detectors
A standard domestic installation typically includes 4 to 8 detectors (a mix of PIR motion sensors and door contacts). Larger properties or those with outbuildings, garages, or multiple entry points will need more detectors, adding £30 to £60 per device.
Wired vs Wireless
Wireless systems are quicker to install and cause less disruption, but the equipment is more expensive. A wireless installation typically costs 15 to 25 per cent more than a wired equivalent. However, wireless systems are easier to expand later and are the better choice for listed buildings or properties where running cables is impractical.
Property Size and Layout
A one-bedroom flat will need fewer detectors and less cabling than a five-bedroom detached house. Multi-storey properties also take longer to install, which affects the labour cost. As a rough guide:
- 1-2 bedroom flat: £450 to £700
- 3 bedroom semi-detached: £550 to £1,000
- 4-5 bedroom detached: £800 to £1,800
- Large or complex properties: £1,500 to £2,500+
Smart Features
Modern alarm panels from manufacturers like Texecom and Pyronix offer app control, allowing you to arm and disarm remotely, receive push notifications, and view system status from your phone. Smart features typically add £50 to £150 to the system cost, plus there may be a small annual subscription for cloud connectivity.
Existing Wiring
If your property has an old alarm system with intact wiring, it may be possible to reuse the cable runs. This can reduce installation time and cost. We regularly take over existing systems, replacing the panel and detectors while keeping serviceable wiring in place.
Installation Costs
Most reputable installers quote a single price that includes both equipment and labour. Be cautious of quotes that separate these, as it can make comparison difficult.
A typical domestic installation takes 4 to 8 hours depending on the system type and property size. At J&L Security, our domestic alarm systems start from £450 plus VAT, which includes a free survey, professional installation, commissioning, and user training.
Avoid installers who quote without surveying the property first. A proper survey ensures the system is designed for your specific layout and risk profile, and it prevents unexpected costs on installation day.
Ongoing Costs
Beyond the initial installation, there are recurring costs to consider:
Monitoring Fees
If you opt for a monitored system, expect to pay £15 to £40 per month depending on the level of service. Basic monitoring (ARC notification) is at the lower end; police response monitoring with keyholder dispatch is at the upper end.
Maintenance and Servicing
Annual servicing is recommended for all alarm systems and is typically required by insurance policies. A standard domestic service visit costs £80 to £150. Many installers, including J&L Security, offer maintenance contracts that bundle servicing with priority callout rates.
Battery Replacements
Alarm panel backup batteries and wireless detector batteries need periodic replacement. Panel batteries last 3 to 5 years (£15 to £30 to replace), while wireless detector batteries last 2 to 5 years depending on the device.
How to Get Value for Money
The cheapest alarm is not always the best value. Here are practical steps to get the right system at a fair price:
- Get at least two quotes from inspectorate-registered installers (SSAIB or NSI approved). This ensures the installer meets national standards.
- Check what is included. A good quote should cover the survey, equipment, installation, commissioning, and user training.
- Ask about aftercare. What happens if the system develops a fault? Is there a warranty? What are the callout charges?
- Consider your insurance requirements. If your insurer requires a monitored system, factor in the annual monitoring cost from the start.
- Think about the future. A system that can be expanded later (additional detectors, integration with CCTV) may save money in the long run.
What We Charge at J&L Security
We offer transparent, fixed-price quotes with no hidden costs. Our domestic burglar alarm installations start from £450 plus VAT, which includes:
- Free, no-obligation security survey
- System design tailored to your property
- Professional installation by qualified engineers
- Full commissioning and testing
- User training and handover documentation
- 12-month installation warranty and 2-year equipment warranty
We install systems from Texecom, Pyronix, and RISCO, and we are SSAIB approved, meaning our monitored installations are eligible for police response.
To get a quote for your property, contact us or call 0204 538 5925 to book a free survey.
Summary
| System Type | Typical Installed Cost | Annual Running Cost |
|---|---|---|
| Bell-only | £350 to £600 | £80 to £150 (servicing) |
| Speech dialler | £450 to £800 | £80 to £150 (servicing) |
| Monitored | £600 to £2,500 | £260 to £630 (monitoring + servicing) |
The right alarm system depends on your property, your budget, and the level of protection you need. A free survey from a qualified installer is the best starting point, as it gives you a recommendation based on your actual risk profile rather than a generic price list.
Read more about our burglar alarm installation services or explore our full range of security services.