✅ Trusted Local Experts
✅ Over 27 Years Of Experience
✅ Affordable Solutions
ALARM INSTALLATION AND MAINTENANCE
Securing Your Peace Of Mind
Welcome to Holder-Diaz Security – Your Trusted Local Specialist in Intruder Alarm Systems. We specialise in servicing and maintaining both hard-wired and wire-free intruder alarm systems across the London Borough of Bromley and surrounding areas.
Installation of Intruder Alarm Systems
Book your survey and see how the security of your home can be improved with us.
Intruder Alarm System Inspections
We provide call-outs and regular inspections of Intruder Alarm Systems for our customers.
Intruder Alarm System Maintenance
We value our customers and they trust us. Most sign up to our affordable Maintenance Plans.
Maintenance Contracts From £12 Per Month.
Jake, Homeowner from Bromley
“I trust Holder-Diaz with my security. They keep my alarm system running smoothly with their affordable maintenance plan at just £12/month. ”
Anonymous Homeowner, West Wickham
"Dave's expertise is second to none and it’s reassuring to have a local specialist I can trust. After a break-in, he not only got my alarm system back in top shape but also recommended a great locksmith."
Rose, Homeowner and Artist
"They did an excellent job on my Keston home and delivered the same top notch service for my studio, where protecting my valuable art collection was crucial."
Need a Locksmith?
Call Wickham Locksmith, Greville on 07956 262628
Meet Our Team
Trusted. Experienced. Dedicated.
Holder-Diaz Security is a local, family run company with deep roots in the Bromley area, where we have lived and worked for over 30 years.
With our team’s expertise and commitment, we provide trusted, high quality security solutions for our community.
