Protect Your Home & Business with Professional Security Systems
Burglar alarms, CCTV, fire alarms and 24/7 monitoring across London. NSI/SSAIB approved. Insurance recognised.
System Active — All Clear
24/7 monitoring enabled · London ARC
What We Offer
Professional Security Services
NSI-approved engineers install and maintain every type of security system for London homes and businesses.
NSI/SSAIB Certified
Grade 2 & 3 Systems
Why Sure Alarms
London's Most Trusted Security Specialists
Over 15 years protecting London homes and businesses. Every engineer is DBS-checked, fully qualified and NSI-approved.
NSI/SSAIB Approved
Independently inspected and certified by the UK's leading security bodies. Our installations meet the strict BS EN 50131 standard required by most insurers.
24/7 Alarm Monitoring
Our ARC monitors your property around the clock, 365 days a year. When your alarm triggers, we respond immediately — not tomorrow morning.
Free Security Survey
Every installation begins with a no-obligation survey. Our engineers assess your vulnerabilities and recommend the right solution for your budget.
10-Year Warranty
We stand behind our workmanship. All Sure Alarms installations carry a full 10-year warranty on both equipment and labour.
Local London Experts
Our engineers live and work across London, covering all 32 boroughs. We understand the unique security challenges of every neighbourhood.
Insurance-Recognised Systems
Our monitored NSI-approved systems are recognised by leading UK insurers and can significantly reduce your home or business premium.
Customer Reviews
Trusted by London Homeowners
Rated 4.9 out of 5 by hundreds of satisfied London customers.
“Absolutely brilliant service from start to finish. The engineer arrived on time, explained everything clearly and the install was clean and tidy. Our insurance company were happy with the NSI certification. Highly recommend.”
Sarah Thompson
Barnet, London
“Had a full burglar alarm and CCTV system installed. The team were professional, quick and incredibly knowledgeable. The remote viewing app works perfectly. I feel so much more secure. 5 stars without hesitation.”
James Richardson
Westminster, London
“After being broken into last year I wanted the best protection available. Sure Alarms delivered exactly that — a proper monitored system with 24/7 response. Fantastic value and the install was done in a single day.”
Emma Clarke
Croydon, London
Coverage Areas
London & Home Counties Coverage
Our engineers cover all 32 London boroughs plus Surrey, Kent, Essex and Hertfordshire.
Need urgent alarm repairs?
Our emergency engineers are available 24 hours a day, 7 days a week across London.
Got Questions?
Frequently Asked Questions
Common questions about alarm installation, monitoring and security systems in London.
How much does a burglar alarm installation cost in London?+
Are your alarm systems NSI approved?+
How long does alarm installation take?+
Do you offer alarm monitoring contracts?+
Can you install CCTV alongside a burglar alarm?+
Own Your Security System — Don't Subscribe to It
Verisure operates on a subscription model where you rent rather than own your alarm equipment. With Sure Alarms, you purchase and own your system outright — no lock-ins, no rental fees, just a professional installation backed by a 10-year warranty.
Get Started
Request Your Free Security Survey
One of our NSI-approved engineers will contact you within 2 hours to arrange a free, no-obligation site survey.