Intruder Alarm Installation

BAFE-certified engineers with over three decades of combined experience. London and Kent. Updated September 2026

Key facts

BS EN 50131-1 & PD 6662 Compliant
NSI Gold Accredited

Professional Intruder Alarm Installation in London and Kent

At Smartec Fire Safety, we provide professional intruder alarm installation services designed to protect your premises, people and valuable assets. Our experienced engineers work with you to assess your security requirements and install reliable alarm systems tailored to the layout and needs of your property. From small businesses and commercial premises to larger sites, we deliver effective security solutions with professional installation, testing and ongoing support, helping provide peace of mind that your property is protected against unauthorised access.

At a glance

What is an intruder alarm system?

An intruder alarm system detects unauthorised entry using door contacts, motion detectors and other sensors, triggering a local alert and, where connected to an Alarm Receiving Centre, a remote signal. The design and equipment required depend on the level of risk the premises presents, formally assessed and graded under BS EN 50131-1.

Is it a legal requirement?

Installing an intruder alarm is not a legal requirement, but insurers frequently specify one, and the grade required, as a condition of cover. PD 6662 requires a documented risk assessment to determine the correct grade before installation begins, giving both you and your insurer confidence the system matches the actual risk.

Understanding alarm grades

BS EN 50131-1 defines four security grades, reflecting the sophistication of intruder the system is designed to resist.

Low risk

An opportunistic intruder with limited knowledge of alarm systems

Low to medium risk

Some knowledge of alarm systems and basic tools

Medium to high risk

Familiar with alarm systems, using a comprehensive range of tools

High risk

The security of the premises is a high priority, defended against sophisticated intruders

How Smartec does this

Smartec Integrated Systems is NSI Gold accredited across all our security services. Our engineers carry out a full risk assessment before recommending a grade, then design and install to BS EN 50131-1 and PD 6662. Systems are maintained under BS 9263 at least annually, or every 6 months where the system is linked to an ARC for police response. Every visit is logged in your Digital Logbook on the Smartec Client Portal.

What does installation involve?

Documented risk assessment, establishing the correct grade for the premises

System design, specifying detector type, positioning and control equipment

Installation of detectors, control panel and, if required, signalling equipment

Commissioning and full functional testing

Certification and handover, with the system added to the Smartec Client Portal

Who needs this?

✓

Offices & retail

Insurer-specified protection outside trading hours

✓

Warehouses & industrial

High-value stock and unoccupied overnight premises

✓

Multi-site operators

Consistent grading and monitoring across a portfolio

✓

Schools & healthcare

Out-of-hours protection for unoccupied sites

Every test and visit is recorded in tamper-proof Digital Logbooks on the Smartec Client Portal — live asset tracking, photo-verified defects, instant certificate downloads.

PROJECT

13-15 Fitzroy Street

Smartec designed and installed the intruder alarm system at 13-15 Fitzroy Street as part of the same NSI Gold accredited security installation as the building’s access control, both maintained and tracked through the Smartec Client Portal.

FAQs

What is PD 6662?: The UK scheme document that packages together the European and British Standards, including BS EN 50131-1, governing intruder alarm design and installation.
What are the alarm grades?: Four grades from 1 (low risk, opportunistic intruder) to 4 (high risk, sophisticated intruder), determined by a documented risk assessment.
Is a risk assessment required before installation?: Yes, PD 6662 requires a documented risk assessment to establish the correct grade before a system is designed.
How often is an intruder alarm maintained?: At least annually. Systems linked to an ARC for police response are maintained every 6 months.
Does this include monitoring and police response?: Installation and monitoring are separate services. See our Alarm Monitoring page for URN registration and police response setup.
Will my insurer specify a particular grade?: Often, yes. Insurers frequently require a specific grade as a condition of cover, based on the value and risk profile of the premises.