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Endorsed by Which? Trusted Traders

National Security Systems Group

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4.8

32 Reviews

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

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

Why you can trust these reviews

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100% of the reviews we publish have been through our stringent moderation process.

4.8
32 reviews
Customer Service
4.8
Quality
4.9
Value
4.8
Sort by
I would highly recommend NSSG, simply the best!
Customer Service
Quality
Value
I have been using NSSG for my home alarms for over 15 years now and on this occasion they upgraded my entire alarm and CCTV system. The service we received from the engineer (Jay) this week was beyond fantastic, on being faced with a problematic fixed wall panel in the kitchen which required a CCTV screen to be fitted to it. Jay managed to gain access to an area behind the panel which seemed impossible to reach and with no damage or signs of entry in order to connect the screen. Another great example of thinking out of the box which is very much the NSSG hallmark. Over a period of two days Jay completed a full alarm & CCTV upgrade, adding various sender units behind wall-mounted TV's, extra CCTV cameras, door shocks and contacts including a roof beam and the list goes on. On viewing the finished work, it is like everything was always present - their work is always neat, clean and very tidy. From a technical point of view, I have never found anyone better when it comes to complete security installs (alarms / CCTV) and they can even design a system tailored to your specific needs. Their engineers are always polite, professional and nothing is too much trouble for them. In regards to aftercare, the customer service team, the technical help desk team are truly some of the nicest most helpful genuine people you will ever encounter. I would highly recommend Vince and his team and from my experience of using them, there is simply no one better than NSSG!.
Customer in Greater London Posted on 11/02/2022 , work completed 08/02/2022
Excellent service here.
Customer Service
Quality
Value
Engineer turned up on time. Polite, clean and tidy. Explained what he was going to do and checked in with me throughout. Cleaned up after himself as well and was quick and efficient. Will definitely use them again.
Customer in Greater London Posted on 28/06/2021 , work completed 28/06/2021
New Video Access Entry system
Customer Service
Quality
Value
Extremely pleased with a very professional and efficient service carried out with pleasant manner. A very professional service.
Customer in Greater London Posted on 10/06/2021 , work completed 08/06/2021
Careful and thorough approach, punctual and efficient
Customer Service
Quality
Value
We have just moved to a new house and inherited the existing alarm system which was supplied by NSS some years ago. Having transferred the maintenance arrangements we have now upgraded the system to a modern control unit and alarm panels. The price quoted was very reasonable and the work done over three sessions by a great team who communicated well and explained what would be dealt with on a subsequent visit. The upgraded system is now fully up and running and we are very happy with the work done.
Customer in Greater London Posted on 03/03/2021 , work completed 03/03/2021
Efficient, Professional and Fast Service
Customer Service
Quality
Value
Finefair have been using NSS for our head office and residential properties over the last 6/7 years. NSS are our go-to company for any CCTV and alarm jobs. All of our jobs no matter how big or small are all dealt with efficiently and professionally. Thank you to team at the offices, who are extremely helpful and courteous when booking in appointments, services, and monitoring visits. I would also like to take this opportunity to thank Dee, Hitesh and Rohit for there attention to detail and professionalism.
Customer in Greater London Posted on 05/02/2021 , work completed 05/02/2021
Excellent Job and competitively priced
Customer Service
Quality
Value
My old alarm system was becoming problematic. NSSG provided competitive quotes for the various options. During the installation (which was professional and fast) I changed my mind about the number of sensors I required and they managed to include it in the installation at a very reasonable price
Customer in Essex Posted on 12/01/2021 , work completed 11/01/2021
Safe, secure and satisfied
Customer Service
Quality
Value
If you're looking for prompt, professional and reliable service, look no further! Had my security system replaced by NSS today. Not only did NSS call to offer a cancellation, J arrived on time, explained the steps and completed the work in an organised manner. Was impressed with J's conduct and patience. NSS followed up the same day to ensure satisfaction. I don't expect any problems but know where to go should I need help. Used NSS before and they always deliver.
Customer in Greater London Posted on 01/12/2020 , work completed 01/12/2020
Excellent service provider for our school.
Customer Service
Quality
Value
Dave and his team have continued to provide excellent CCTV services for our school since taking over from a very poor company a couple of years ago. Our intruder alarm provider has also declined in service provision in the last few years so we asked NSSG to upgrade and take over our intruder alarm services. They have recently done this and were quick, efficient and provided very good advice as always. As a school we work very hard to find good service providers to work with and I have no hesitation in recommending them.
Customer in Greater London Posted on 18/11/2020 , work completed 17/11/2020
New HD CCTV CAMERAS AND NEW HD BOX
Customer Service
Quality
Value
Excellent service. Every thing was done extremely professionally. Every one is so helpful and do their best to please Customers like us. I would recommend them to anyone any time. Ashok Sharma
Customer in Essex Posted on 11/11/2020 , work completed 11/11/2020
Fantastic service, very professional and knowledgeable
Customer Service
Quality
Value
Before selecting NSS for my burglar alarm, I did a lot of research and got quotes from 6 other companies too. I found the NSS quote competitive. All the companies I got quotes from installed Pyronix branded burglar alarm systems, and the equipment was more or less similar. But it was the customer service that set NSS apart. The main reason I selected NSS was because of the service and knowledge provided by the surveyor, Ash, who came to visit me and subsequently who I dealt with afterwards until installation. I'm very detailed and I have bombarded Ash with so many questions, via email, Whatsapp and calls, and he always gets back to me straight away, he is very helpful, knows his stuff technically and generally a nice guy. Ash is a real asset to the business and I would definitely recommend NSS. If you are able to request which surveyor you deal with, would recommend asking for him.
Customer in Greater London Posted on 03/11/2020 , work completed 02/11/2020