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Installing and maintaining alarm systems for over 30 years

Spy Alarms is one of the largest privately owned installers of security systems in the South East. We have more than 17,500 customers – both domestic and commercial – throughout London, Kent and the Home Counties.

The business was founded in 1985 by Martin Foster, after his own house was burgled and he could not find the system he needed from existing suppliers. Our goal is to provide competitively priced installations using quality components and the latest technology.
From studio apartments to country estates, small offices to large industrial complexes, we instal and maintain intruder and fire alarm systems for all kinds of premises.

Our customers include a Football League Club, golf clubs, factories, offices, care homes, schools and homeowners, with a large proportion of our work being repeat business. We are approved suppliers to Kent County Council and the London Borough of Waltham Forest.

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Our approach

We believe in providing the best security system for the individual needs and budget of each customer. In order to do that, we make sure we’re familiar with your situation and then tailor our solutions accordingly. We value our reputation and only send out trained and qualified engineers, who take a pride in their work and enjoy delivering excellent service.

We begin by sending out an experienced surveyor to assess your property and security requirements. This service is free of charge and it enables us to design a burglar alarm system that is bespoke to you.

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Recognised for quality

Spy Alarms is certified to NSI Gold standard, which is the highest accreditation from the security industry governing body, the National Security Inspectorate. It is proof that we work to a set of extremely high standards and are audited on a six monthly basis to ensure that we are maintaining them. NSI Gold is recognised by the police and all insurance companies, so it is valuable in qualifying customers for police monitoring and helps to secure the most favourable insurance premiums.

In addition, we have consistently gained the Metropolitan Police Alarm Performance Award (Gold) and Custodian Gold Shield Award for the lowest number of false alarms recorded.

Our accreditations also include BAFE, the independent registration body for third party certified fire protection companies, and the SafeContractor health and safety assessment scheme, as well as ‘approved supplier’ to Kent County Council and the London Borough of Waltham Forest.

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Our people

Our business is all about providing peace of mind and that begins with your trust in us. Our reputation relies on the performance of our people, from the sales team that take your enquiries to the engineers who install and service your systems. We employ people who value the ethos of customer service and take pride in providing outstanding service and expert advice.

When you first call Spy Alarms, you will be pleased to find there are no call centres. You will be put through to someone who is qualified to understand your needs and one of our surveyors will then visit your property or premises to gather a thorough understanding of your needs, before designing a bespoke system to fulfil your requirements.

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Careers at Spy Alarms

We currently have a number of vacancies that we are looking to fill. If you would like to apply for a job with Spy Alarms, please click the link.

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Why Spy Alarms

FREE Property Security Survey from an experienced surveyor

The best system to suit your needs AND your budget

NSI Gold accreditation

SMS alerts or 24/7 security monitoring with police and/or keyholder notifications

Over 30 years experience in installation and maintenance

Reliable, up to date equipment

Wired or Wireless systems

All staff are police checked

Kent and London-based fitting/maintenance teams


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We will endeavour to respond to you within 2 hours (during usual business hours).