Cost of Door Access Control
across the UK

# Door Access Control Accreditation Guide

The main UK trade bodies overseeing door access control include the Security Industry Authority (SIA), which regulates security operatives and companies providing manned guarding and electronic security services, and the National Security Inspectorate (NSI), a third-party certification body that audits and approves security companies against BS 7499 standards. The SSAIB (Security Systems and Alarms Inspection Board) provides similar third-party certification for alarm and security systems installers. Additionally, many reputable access control providers hold membership with the British Security Industry Association (BSIA), which sets professional standards and promotes best practice. These accreditations mean that a provider has undergone independent assessment of their technical competence, staff vetting procedures, installation quality, and customer service standards. For door access control specifically, you may also encounter ISO 27001 certification, which demonstrates information security management—particularly important if the system handles personal data or connects to networked infrastructure.

To verify a provider's credentials, check the SIA, NSI, and SSAIB registers on their official websites, where you can search for the company name and confirm their current status and the specific scope of their accreditation. Ask the provider directly for their accreditation numbers and certificates, and don't hesitate to contact the accrediting body to confirm details. It matters because accredited providers are regularly audited, must maintain professional standards, and typically carry appropriate insurance and complaint resolution procedures. This verification protects you from unqualified installers who may provide poor-quality systems, inadequate after-sales support, or leave your premises at security risk. An accredited provider also offers recourse if something goes wrong, whereas a non-accredited installer may leave you with limited legal remedies.

Accredited providers typically charge 10 to 25 percent more than unaccredited