Intruder Alarm Systems
Commercial intruder detection systems designed, installed and maintained for business premises across London and the South East — with a risk-based approach, clear documentation and ongoing support to keep systems reliable and insurance-compliant.
Need assistance with your fire or security system?
Call our team on 020 3376 2672
What We Do
We design, install, modify and maintain commercial intruder alarm systems tailored to your premises and risk profile. Our approach balances effective detection with false alarm prevention — and we provide clear documentation throughout.
Design & Installation
- Site security surveys and risk-based design
- New intruder alarm installations (wired and wireless)
- System upgrades and zone expansions
Configuration & Programming
- Control panel programming and user code management
- Signalling path configuration (monitoring/keyholder)
- False alarm investigation and reduction measures
Maintenance & Repairs
- Annual maintenance, testing and certification
- Emergency callout and fault diagnosis
- Detector replacement and repositioning
Integration & Support
- Integration with access control and CCTV
- User training and handover documentation
- Compliance advice for insurance requirements
Typical Environments
We install and maintain intruder alarm systems across a wide range of commercial premises — each system designed around the specific risk profile and operational requirements of the site:
Who We Work With
Supporting the people responsible for security and risk management in commercial buildings
Facilities Managers
Ongoing servicing, system upgrades and false alarm resolution. Technical reviews, clear quotations and full documentation to support building management and insurance compliance reporting.
Managing Agents
Service takeovers, system upgrades and outstanding works for managed commercial property portfolios. Responsive delivery with clear reporting for landlords and leaseholders.
Main Contractors
Intruder alarm installation, commissioning and handover for new build and refurbishment projects. Programme coordination, practical completion support and full documentation for building control sign-off.
Commercial Property End Users
Direct support for owners and occupiers needing installation, servicing or upgrades. Site surveys, practical advice and fixed-price quotations tailored to building use and insurance requirements.
Compliance & Risk-Based Approach
There is no single legal requirement mandating intruder alarms for all commercial premises, but most businesses install them to satisfy insurance conditions, protect assets and meet broader security obligations. We design systems that are proportionate to your risk and straightforward to maintain.
British Standards & Industry Guidance
We design and install intruder alarm systems in line with recognized standards and industry best practices.
- BS 8243 – Installation and configuration of intruder alarm systems
- PD 6662 – Application of European Standards (required for police response)
- BS EN 50131 – Intrusion and hold-up alarm systems
- System grading based on risk assessment
Insurance & False Alarm Management
Most commercial insurance policies specify minimum security standards, often including intruder alarms installed and maintained to recognized standards.
- Annual servicing required by insurers
- False alarm reduction measures
- Monitoring and police response criteria
- Confirmed alarm policy compliance
Maintenance, Testing & Certification
Regular maintenance keeps your intruder alarm reliable, insurance-compliant and eligible for police response where applicable. We provide documented service records after every visit.
Detection Devices
- PIR and dual-tech detector tests
- Door and window contact checks
- Glass break detector verification
- Detector positioning review
- Cleaning and sensitivity adjustment
Control Panel & Signalling
- Zone circuit continuity tests
- Tamper circuit verification
- Signalling path test (if monitored)
- Communication module checks
- Event log review and analysis
Power & User Management
- Backup battery load test
- Mains supply and fuse checks
- User code audit and cleanup
- Entry/exit time verification
- User training refresher
Changing Provider or Inheriting a System?
If you've experienced persistent false alarms, unresolved faults, poor documentation or a lack of responsiveness from your current contractor, we can carry out a system assessment, bring records up to date and take over ongoing maintenance. We'll give you an honest picture of the system before agreeing a contract.
Common Issues We Fix
Intruder alarm faults can compromise security and trigger false alarms. We diagnose and resolve issues quickly to restore reliable protection.
How We Work
Site Survey
We assess your premises, identify vulnerable points and discuss your operational requirements, insurance obligations and any existing system issues.
Risk-Based Design
We propose detector types, zones and signalling appropriate to your risk profile, budget and insurance requirements — no over-specification.
Installation / Modification
Our engineers install or modify the system with minimal disruption to your operations, following BS standards and manufacturer guidance throughout.
Programming & Testing
We configure zones, user codes, entry/exit times and signalling paths, then conduct full system tests before handover.
User Training & Handover
We train your team on arming, disarming, code management and false alarm prevention — and provide clear documentation for your records.
Ongoing Maintenance
Annual service contracts covering detector tests, battery checks, signalling verification and defect remediation — with documented service records after every visit.
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Comprehensive life safety and security solutions for commercial premises across London and the South East.
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Learn MoreCommon Questions
What is the difference between wired and wireless intruder alarm systems?
Wired systems use physical cabling between detectors, contacts and the control panel. They are generally more reliable in environments with radio interference and are often preferred for larger or more complex sites. Wireless systems use radio frequency communication, which avoids the need for cable runs — making them quicker to install and better suited to listed buildings, tenanted premises or situations where cabling is impractical. Both can be designed to meet the same standards and grades; the right choice depends on your premises, risk profile and operational requirements.
What is a police response system and how does my system qualify?
A police response system is one where a confirmed alarm activation can result in a police attendance. Eligibility is not automatic — it depends on a combination of factors including system design and grading, signalling arrangements, the monitoring centre used, false alarm history, and compliance with the applicable standards (including PD 6662 and the requirements of the relevant police force). Ongoing maintenance and a low false alarm record are also typically required to retain response. We can advise on what is needed during the design stage if police response is a requirement for your site.
Can I arm and disarm my intruder alarm system remotely?
Many modern control panels support remote arming and disarming via a smartphone app or web portal, either directly or through a monitoring centre. This is useful for managing access across multiple keyholders, responding to out-of-hours situations, or simply confirming the system is set before leaving site. Availability depends on the panel and signalling configuration. If remote control is a priority, we can factor this into the system design from the outset.
Commercial Intruder Alarm Specialists
New installations, system upgrades, maintenance takeovers and false alarm resolution — for facilities managers, managing agents and commercial property operators across London and the South East.
Speak to an Engineer Today – 020 3376 2672