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National Security Systems Group Since forming in 1995, we have quickly established ourselves as one of London's leading security systems providers. Commercial National Security Systems Group provides security systems and alarm systems products in London. We are NSI Gold Company offered including fire alarms London, commercial alarm systems, intruder alarm London, CCTV systems installation and access control systems.

We appreciate that 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.
Served areas
  • Chingford, South Woodford, Woodford Bridge, Buckhurst Hill, Loughton, Clayhall
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At National Security Systems, we are proud of our reputation as dependable and progressive security specialists. Since starting in 1995 as Sole trader and formed in 2011 as Limited company, 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 services.
Call us today to take advantage of this FREE service and see how your home could benefit from being more secure. These home security systems and devices are highly effective in deterring and interrupting intruders, and not in 'thousand of pounds' category. In fact, you can protect your home with an exceptional house alarm system for less than 500.
Central Station 24/7 Monitoring and keyholder notification via telephone call from our operators. NSS Security Systems Limited trading as National Security Systems Group | Registered in England and Wales.
The modern world presents commercial property owners with serious security challenges. Vandals and burglars are just some of the security threats that can target your property and deliberately put your company, staff and customers at risk. But with a state-of-the art security system from National Security Systems, you can protect your premises and place intruders outside of your business where they belong.
But your CCTV system needn't be - not when you have an award-winning CCTV supply, installation and maintenance service like NSS. Plus the investment you make in to quality CCTV systems with us provides you with real and quantifiable value for money. The cost of undeterred and un-prevented intruders in the work place can be high; from damaged equipment and goods and physical injury from assault to disruption to the day to day profit-making processes of business.Research shows that CCTV is the biggest single deterrent to intruders.
Reviews (14)
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David Jenkins
Jan 11, 2022
Mini Roundabout, Blake Hall Road, E11 circa 1715 - 18/01/21 Dangerous driving - NSS van showed total disregard for a cyclist on the roundabout. Very near miss.
Gurpal Sohanpal
Jul 07, 2021
NSS what a great bunch, Used them for many years for securing different types of buildings. Just done my alarm today for us and tbh there service reassured me today why we have used NSS for over a decade. Great Knowledge and unlike other organisation they actually listen to what you want and need, no upselling or anything like that which for me shows a level of honesty and not motivated on just making money. Installation was seamless, no mess everything left as it found, the system was explained throughly so all in all a great experience thank you all at NSS Customer for Life
Shan
Jul 28, 2020
Vin & Co from NSS were instructed to fit CCTV and a security alarm system at my newly purchased home prior to me moving in. Honestly, best decision I had ever made. They set up all the cables whilst the house was being gutted and did a fantastic job from start to finish. Not only polite but highly professional and honest. Completely transparent and always there to help 24 hours if something goes wrong.

This is the peace of mind I needed. The icing to the cake is that they are all just so friendly. I would highly recommend them, their service for installation through to aftercare is second to none. Tech guys are amazing! Thank you for making me feel safe and working with me since mid last year! Ps. Also apologies if I gave you a headache during this process with my demands! Highly appreciated : Sharon.
Havana
Jun 21, 2020
Good service, always thinking what is best for you. The work is neat and clean. Have been using this company on 3 occasions and never experienced problems, at times needed advice and help with after service and have never been charge. Well worth spending extra few pounds! Never question their job or quality off equipment use/supply.
Mahesh Pindoriya
May 27, 2020
Fantastic products.works extremely well.highly recommended alarm system.
H. S.
Apr 30, 2020
Highly recommended. Great customer service and value for money. First class!
Forte Homes
Dec 23, 2019
Pleasure to work with. great knowledge of CCTV and Alarms. highly recommended
Amar Raithatha
Dec 30, 2018
Really could not praise these guys more. Friendly knowledgeable and take the time to explain everything. Their security systems are a top brand and fit the latest technology. The workmanship is second to none and exceeded my expectations and very reasonable on price. Thank you very much NSS.
Lisa
Jun 20, 2016
Hello, I'm a new business owner and having a trusted alarm system fitted has always been something I needed to have. From the start to the end of the NSS's service, I've been so pleased with everything the guys here has done.
Lou
May 27, 2016
NSS has the best 24hr technical support out there. No matter what time of day it is they answer or call back within minutes. The problem is always sorted and the engineers on call are always nice and friendly even if they have been woken up in the middle of the night.
Lucy Patel
Dec 24, 2013
I did my homework and decided to go with #nssg group. After we had a break in and robbery at our new house, we knew we needed to get a security system. Though not advertised as much as ADP, the pricing was much better and so was the system. The whole installation took practically no time at all, and the phone support was extremely helpful and supportive.

I like that the command center and entire system is on the cell network, so even if the power goes out, we are still secure. I highly recommend this company and don't regret it at all.
Natasha
Exceptional service and wonderful staff ! All security requirements were fulfilled swiftly and professionally.
Daniel
Cannot fault the services provided by NSS. I was introduced to NSS on the recommendation from a friend and the engineers that installed at my house randeep and hitesh were friendly and very courteous. Thanks
Nikolay M.
Excellent quality service. Very quick to respond and great support service.