Holder-Diaz Security Ltd.

18/05/2026

Tired of pushy alarm companies?

So are we.

That’s why we built our company differently.

Local family-run alarm company with over 30 years’ industry experience providing honest advice, fair pricing and high-quality installations — without the pushy sales tactics.

We believe in doing things properly, treating customers fairly, and recommending only what you genuinely need.

HOLDER-DIAZ SECURITY

020 8249 0204

www.holderdiazsecurity.com

Our Yell.com Reviews: https://www.yell.com/biz/holder-diaz-security-bromley-10933636/

05/05/2026

We would like to say a heartfelt thank you to all our customers for your continued trust and loyalty — it truly means everything to us.

As a small, family-run business, your support helps us grow and create local employment opportunities in our community.

If you are considering installing a new alarm, are thinking of upgrading your system or simply not completely satisfied with your current security provider, we would love the opportunity to help.

📞 020 8249 0204
🌐 www.holderdiazsecurity.com

Feel free to check out what our customers say about us:
https://www.yell.com/biz/holder-diaz-security-bromley-10933636/

Thank you again for supporting local businesses like ours.
— Holder-Diaz Security

Find Holder-Diaz Security on Yell. Get contact details, photos and opening times. Search for Burglar Alarms & Security Systems near you and submit reviews.

09/03/2026

HOLDER-DIAZ SECURITY - With 30+ years of experience working for the biggest companies in the industry, David found his most rewarding experience working for family owned Wickham Security until the owners retired back in 2023.

As a family with experience also in the police and luxury hotel industry, we decided we should put such valuable skills and knowledge to the service of a community that is in much need of honesty and good customer service. We are friendly, helpful and experienced and we offer our services with no pretence other than to ensure our customers receive the best from the best.

We install, service and maintain intruder alarm systems for home and business. We carry out free surveys and offer no-obligation quotes.

020 8249 0204
www.holderdiazsecurity.com

16/02/2026

12/01/2026

Get in touch for a friendly, no-obligation chat whether you are interested in installing a new alarm system or servicing a current one.

We service the London Borough of Bromley and surrounding areas.

Tel: 020 8249 0204

www.holderdiazsecurity.com

07/01/2026

Make home security your resolution —

www.holderdiazsecurity.com | 020 8249 0204

01/01/2026

Wishing you all a Happy & Healthy 2026!

15/12/2025

Don’t let intruders ruin your holidays — Securing Your Peace of Mind is only a call away.

08/12/2025

Don’t Wait for a Break-In to Check Your Alarm.

A well-maintained system is the first step to feeling confident in your home - Securing Your Peace of Mind is just a call away.

Holder-Diaz Security 020 8249 0204