Keep your property safe with these 5 alarm system installers in London
Feeling secure at home or at work is a basic need. A simple motion sensor might work for a flat, but a large warehouse needs serious fire and intruder protection.
Choosing the best alarm system in London is hard with so many options. I sorted through the noise to find reliable installers who don’t hide any catches.
Below are the companies I’d call first.
How much does an alarm system cost in London?
A professionally installed alarm system in London typically costs between £500 for a basic model and £1,500 for a fully integrated smart monitored setup.
| Type of Alarm System | Supply & Professional Installation Cost | Ongoing Annual Monitoring Fees |
| Bell-only wireless | £500 – £600 | £0 |
| Bell-only wired | £500 – £800 | £0 |
| Smart alarm system | £650 – £1,300 | £0 – £150 (Optional app/cloud) |
| Monitored system (24/7 ARC) | £800 – £1,500 | £180 – £500+ per year |
1. Armour Security Ltd
Website: https://armour-security.co.uk/
Address: 86 Goodwin Road, Claverings Industrial Estate, N9 0BJ
Contact: 020 8364 1717 | [email protected]
Hours: Monday-Friday, 9:00 AM – 5:00 PM | Saturday-Sunday, Closed
Armour Security Ltd holds NSI NACOSS Gold approval. Insurance companies widely accept them as TradeCraft installers, which could lower your insurance premiums.
Their highly trained local technicians understand the security challenges of urban living and can offer a tailored approach to your safety.
What I like most is their registered Alarm Receiving Centre (ARC), which monitors your system around the clock. That guarantees an immediate response in an emergency.
I spoke to a neighbor who used them last year. They couldn’t stop praising how quickly the team coordinated with the local police.
Where you live matters, though. Their coverage focuses on the northern boroughs, so residential clients elsewhere might struggle to book an installation.
Customer Reviews
Thank you all so very much!
I have been with Armour Security for eight years, they were recommended by a friend and I have always been delighted with their service. Roy has serviced my alarm system most times and is always friendly, knowledgeable and I feel super secure in knowing I can ask him anything and he’ll tell me the right answer with no judgement. The office team are also very friendly and efficient. Thank you all so very much!
Rosie van Someren | Google Review
Well done Armour Security
The two service engineers who arrived on time were both very polite, extremely helpful and a pleasure to meet. Both Roy & Michael should be commended on their professionalism for customer service. Well done Armour Security
James Nicholson | Google Review
2. Astoria – Fire Alarm Installation & Maintenance
Website: https://www.astoriafiresec.com/
Address: Office 401, Clerkenwell Workshops, 27-31 Clerkenwell Close, EC1R 0AT
Contact: 020 7099 5552 | [email protected]
Hours: Monday-Friday, 9:00 AM – 5:00 PM | Saturday-Sunday, Closed
Astoria handles the complex fire safety and security needs of busy commercial venues. They install fully compliant fire alarm systems for offices and restaurants.
They don’t just install the panels and leave. Their team runs thorough site surveys to record device counts and system conditions.
Those surveys feed into a solid maintenance plan. Regular servicing keeps your premises compliant with current safety laws.
Their ongoing support also covers access control and cameras, which keeps everything operational over the long term.
However, they’re strictly commercial, so residential needs rarely fit their focus. Their central location also means longer travel times if your property sits on the city’s outer edges.
Customer Reviews
I would highly recommend Astoria
It quickly became clear to both me and my boss that we needed an urgent inspection of the fire alarm system.
As my boss was away, I contacted several companies requesting an emergency call-out. Astoria was the only company willing to attend and help us on Boxing Day, which we are extremely grateful for.
Lee was especially friendly, helpful, and reassuring throughout the process. He handled the situation professionally and made a stressful experience much easier to manage. Excellent service, particularly on a public holiday. I would highly recommend Astoria
Raimonda Ramanauskaite | Google Review
A fantastic company with excellent service!
I now feel so much more secure knowing my property is protected with a top-notch alarm system. I would highly recommend Astoria to anyone looking for reliable fire safety and security services in London. A fantastic company with excellent service!
Philip Octave | Google Review
3. KForce Security
Website: https://www.kforcesecurity.co.uk/
Address: 724 High Road, Leytonstone, E11 3AJ
Contact: 020 8638 6904 | [email protected]
Hours: Monday-Friday, 9:00 AM – 5:00 PM | Sunday, Closed
KForce Security focuses on complete business safety. They integrate fire detection and access control with smart intruder alarms in one intuitive setup.
Their fully certified in-house team handles everything from emergency smoke detectors to cloud-enabled control panels. That gives property managers early warnings of potential breaches.
I hired them to upgrade a small rental property. Their 24/7 customer support was a big help during the initial setup.
With this company, you get strong surveillance backed by constant technical assistance. That keeps your mind at ease once the system is running.
Distance is the drawback. Their Leytonstone base can mean longer travel times and scheduling delays for homeowners in southwestern neighborhoods.
Customer Reviews
Thanks a million.
Imran was polite and knowledgable. – He upgraded my alarm system with a few new bits at a very competitive price. He is also going to service the system annually as it is a requirement on my comprehensive home insurance policy. Thanks a million.
Alice Evans | Google Review
He was very thorough and knowledgable, offering great advice.
I had an old home alarm kit bought years ago that I hadn’t installed. I asked Imran at KForce to quote for installing and testing. On the first visit, I realised that the kit I had didn’t do exactly what I wanted so Imran kindly agreed to come back and install once I had everthing. True to his word, he came back today and installed and tested the whole system. He was very thorough and knowledgable, offering great advice.
mjkedit | Google Review
4. C&C Security Systems
Website: https://candcsecuritysystems.co.uk/
Address: 54 Herbert Road, SE18 3SH
Contact: 020 3553 2364 | [email protected]
Hours: Monday-Friday, 9:00 AM – 5:00 PM | Saturday-Sunday, Closed
C&C Security Systems has decades of experience as an NSI and NACOSS Gold installer. They’ve been around since 1984.
They build flexible alarm and access-control systems for single and multi-occupation sites. You can pick a simple entry-level alarm or a fully monitored one with direct police response.
Their detailed site surveys also help when other work is happening on your property. If you’re already coordinating handyman services in London for renovations, a survey makes the security integration painless.
And I love their strong after-sales warranty support. That keeps your equipment working over time.
However, note that their service area is very wide, which occasionally causes scheduling conflicts and longer waits for clients.
Customer Reviews
We would use C&C again.
We were very impressed with the alarm installation services provided by the C&C company. All staff were friendly, knowledgeable and supportive in our special situation. The service was delivered promptly, one day for consultation, the following week installation. We feel very secure and know that we can approach the company for further advice. We would use C&C again. Highly recommend!
Arturas Andrulionis | Google Review
The are always on call 24/ 7 in case you need them
C&C have been taking care of my alarm system for the past 24 years and have always turned up to service it on time without any problems
The are always on call 24/ 7 in case you need them , so I am very happy with the cover they provide RC
jacqueline cummings | Google Review
5. Guard Security Systems LTD
Website: https://guardsys.co.uk/
Address: 1 Skylines Village, E14 9TS
Contact: 020 7887 2244 | [email protected] | Emergency breakdown: 0844 500 5221
Hours: 24 hours a day, 7 days a week
Guard Security Systems LTD is known for fast repairs from NSI NACOSS Gold-certified engineers. Their intercom and alarm repair division works on virtually any broken brand of intercom or CCTV.
They keep a massive local stock of spare parts. That helps minimize downtime when something fails. Their responsiveness suits everyone from individual homeowners to large government institutions.
They also make a good backup if your primary security fails and you need urgent help. Their emergency breakdown line runs 24/7.
But busy times can be a problem. Their emergency service sometimes creates overlapping schedules at peak hours.
Their location also adds travel time for clients in the northwestern and western suburbs.
Customer Reviews
I have no hesitation in recommending the services of GuardSys
Repair to my home intruder alarm, I’m absolutely delighted with the 1st class service both on site and at office level, which were provided when carrying out or arranging my alarm repair. The work was undertaken in a professional and polite manner and I have no hesitation in recommending the services of GuardSys to undertake work required to a very high standard.
Olliekit | Google Review
The experience with this company was great!
The experience with this company was great! They made a survey then I received the quote and the installation took only few hours! The installation was done by Chris who was very professional and clearly very experienced and who took the time to make sure I was happy with the way the system was positioned and fitted and explained how to set up new users and new cards. Highly recommend!
Virginie Waldron | Google Review