Built as a family, owned by its people
For nearly five decades, Sonic Alarm Systems has been built on trust, loyalty and people. Today, the business enters a new chapter as an employee-owned company – a deliberate choice to protect its future, recognise its team, and keep Sonic firmly rooted in Penarth.
Employee ownership is an important milestone for Sonic, but it is also a continuation of what has always mattered: doing the right thing for our people, our customers and our community. Rather than selling the business and seeing decisions move elsewhere, Sonic has chosen a model that keeps ownership local and success shared.
This mini-site explains why that decision was made, what employee ownership means in practice, and how it supports a strong, sustainable future for the business.
From generation to generation, we have decades of experience
From apprentices and technicians, to a full office support team.
Homeowners, business owners, and some of Cardiff's top civic buildings have placed their building's trust in us.




