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Endorsed by

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Trusted Traders

National Security Systems Group

Logo on white
Opening Hours
Today - 09:00–17:00
  • Monday 09:00–17:00
  • Tuesday 09:00–17:00
  • Wednesday 09:00–17:00
  • Thursday 09:00–17:00
  • Friday 09:00–17:00
  • Saturday - Closed
  • Sunday - Closed
Profile thumb nss logo

4.7

18 Reviews

About

At National Security Systems, we are proud of our reputation as dependable and progressive security specialists.

Since forming in 1995, we have quickly established ourselves as one of London’s leading security systems providers thanks to our ability to deliver first-class security solutions and a friendly, personalised service. We can provide you with every type of commercial and domestic security system and products you may need; including Burglar Alarms, CCTV, Access Control and Door Entry Systems.

While our technical expertise and knowledge of security principles means we can offer state-of-the-art, reliable solutions; It is our dedication to customer care that sets us apart from the rest. We appreciate you need to get the best value for your investment and need a security system that is effective and reliable, and can be installed and operated with minimum disruption.

What we do

  • Alarm and security equipment installers

    • Alarm installation
    • CCTV installation
    • Access control
    • Door entry systems
  • Security equipment suppliers and manufacturers

    • CCTV & video equipment
    • Burglar alarm systems
    • Intercom systems

Customer reviews

Reviews summary

4.7
18 reviews
Customer Service
4.7
Quality
4.8
Value
4.6
Sort by
Excellent Service
Customer Service
Quality
Value
NSS have done an great job with our CCTV and Alarm System. Their staff are very helpful and happy to go the extra mile. I would highly recommend them. We feel safe and secure with their systems in place.
Customer in Essex07/03/2019
Don't expect great customer service. Mid-range value for money.
Customer Service
Quality
Value
I have been with this company for a few years. I know that I will definitely change alarm companies next year. This company started out as great value for money however I had a problem last year where they failed to detect that my alarm was not working correctly for 6 weeks which would have been a breach of my home insurance policy. To resolve this, I had to pay for an upgrade to the system to avoid the fault reoccurring - therefore the solution cost was passed on to the customer. You are only allowed one free maintenance visit a year after which you would have to pay for a call out. This is different to other companies I have been with who did not charge for more than one call out. Also this company tried to charge an extra 2.5% for payment via credit card today. When the January 2018 law change was pointed out, they suddenly no longer accepted credit card payments. I need to have trust in the company who provide security to my home and this has now been eroded.
Customer in Greater London05/03/2019
Great work, Tidy and very efficient
Customer Service
Quality
Value
Really pleased with the work carried out. The guys were really professional but still personable. Everything was left neat and tidy and explained to me really well before they left. I wouldn’t hesitate to recommend the company to anyone.
Customer in Greater London01/02/2019
Great service and installation
Customer Service
Quality
Value
A great company with helpful staff and a pleasure to deal with. NSS provided my wife and I with great service and were very professional throughout the process. Nice and tidy installation by an experienced fitter and very prompt with their timings. I would definitely recommend them to family and friends in the future.
Customer in Greater London13/01/2019
Highly Professional throughout.
Customer Service
Quality
Value
I would like to thank Ash and all at NSS for doing an excellent job. From my initial call to NSS Ash was very helpful and professional. NSS were able to install my alarm within 2 days of my initial enquiry a week before Christmas. That was very impressive. I would highly recommend NSS to anyone who is thinking of installing a high quality alarm system . Thank you NSS. Hardeep .
Customer in Greater London13/01/2019
Absolutely fantastic look no further
Customer Service
Quality
Value
Really cannot praise they guys enough they went above and beyond on the job to exceed my needs and expectations. Workmanship is top quality and equipment is fantastic quality. Thanks guys
Customer in Greater London22/11/2018
Professional and impressive
Customer Service
Quality
Value
Fitted a new alarm system in our new office block Great professional job highly recommended - all well installed and explained
Michael G07/11/2018
Cctv instalation
Customer Service
Quality
Value
NSS did a great job for us. They went through all the details and listened to everything we wanted. Both the workman were polite and worked with care and precision. The cables and cameras are all so well fitted that you cannot even see the cables. They provided a training session and helped with the setting up of the apps on our phones. A really truly outstanding service. Nothing was too much trouble from the start to the end and the entire team are very professional. I would have no hesitation in recommending NSS.
Which? Trusted Traders Consumer16/02/2018
Excellent Top class service
Customer Service
Quality
Value
Used NSS recently for some works. Everything from initial visit, estimate, execution and after-sales was excellent.
AshokB15/02/2018
Efficient, professional team
Customer Service
Quality
Value
All members of the team I met with were efficient, professional and courteous for alarm fitting. They were all knowledgeable and open to any trouble-shooting questions. Evidently with their own support team behind the scenes, it was good to know all queries covered. Good turnaround. Above all - Good teamwork from start to finish. All in all a good job, very well done.
Anonymous01/02/2018