A security installer designs and installs electronic security systems for homes and commercial buildings. This includes intruder alarm systems to PD 6662 and BS EN 50131, CCTV, access control, video door entry and increasingly smart home security integration. For professionally monitored alarms and police response, the installer must be approved by NSI (National Security Inspectorate) or SSAIB (Security Systems and Alarms Inspection Board) - the two government-recognised third-party certification bodies for the security industry in the UK.
What they do
- Design and install intruder alarm systems to BS EN 50131 and PD 6662
- Install professionally monitored alarm systems linked to ARCs
- Supply and install CCTV systems with remote viewing capability
- Install access control systems including keypads, fobs and biometric readers
- Fit video door entry and intercom systems
- Install key safes and smart lock systems
- Upgrade commercial security systems to meet insurer requirements
- Commission and program alarm systems and provide user training
- Provide ongoing maintenance contracts for alarm and CCTV systems
When you need one
A security installer is needed whenever a new security system is required or an existing system needs upgrading to meet insurance or police requirements.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Intruder alarm (supply + fit, 3-bed house) | £500 - £1,200 |
| Professionally monitored alarm | £1,000 - £2,500 |
| CCTV system (supply + fit, 4 cameras) | £800 - £2,000 |
| Access control system (per door) | £400 - £1,000 |
| Video door entry system | £300 - £800 |
| Hourly rate | £45 - £80 / hr |
Professionally monitored systems typically carry an ongoing monthly monitoring charge of £15-40/month in addition to the installation cost. Always confirm whether the quoted price includes commissioning, user training and documentation.
Qualifications to look for
NSI is the primary certification body for the UK security industry. NSI approved companies are regularly inspected against NACOSS Gold or Guarding Gold standards. Police and insurer-approved monitored alarms require an NSI or SSAIB approved installer. Check approval at nsi.org.uk.
SSAIB is the other main UK certification body equivalent to NSI. SSAIB-approved installers are regularly audited and held to BS EN 50131 installation standards. Either NSI or SSAIB approval is accepted by most insurers and police forces. Check approval at ssaib.org.
Many security installers are electricians by background and will hold an ECS card. Some security system cabling work may fall under Part P of the Building Regulations - confirm whether the installer can self-certify any electrical work they carry out.
How to find a reputable security installer
Related Calculators
Extension Cost CalculatorFrequently asked questions
Do I need an NSI or SSAIB approved installer?
For a police-monitored or insurance-approved alarm system, yes. NSI (National Security Inspectorate) and SSAIB (Security Systems and Alarms Inspection Board) are the two main third-party certification bodies in the UK. Many insurance policies specify a Grade 2 or Grade 3 intruder alarm installed by an approved installer. For a basic self-monitored system the requirement may be less stringent - always check your insurance policy wording.
What CCTV can I install at home?
You can install CCTV for home security purposes, but if cameras capture public areas such as roads, pavements or neighbouring properties you must comply with UK GDPR. This includes displaying signs informing people they are being recorded and, in many cases, registering with the Information Commissioner's Office (ICO). Cameras covering only your own private property are generally exempt.
What is the difference between monitored and unmonitored alarms?
An unmonitored (bell-only) alarm sounds a siren when triggered but takes no further action. A monitored alarm connects to a 24-hour Alarm Receiving Centre (ARC) that can call you, nominated keyholders or the police when the alarm activates. Monitored alarms are significantly more effective as a deterrent and may be required by your insurance policy for higher-risk properties.