Written by Mark Reid,
Trades Editor
Ranking is driven by review rating and review count from public business listings, with a small lift given to businesses showing a working website and phone number. We check each business's homepage to confirm alarm and security installation is what they primarily offer, which keeps unrelated trades off the page. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have additionally passed our full verification, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. See our How We Verify page for the full list. Other businesses haven't been independently verified by us, and inclusion here isn't an endorsement, so do your own checks before hiring anyone.
Our Top Picks
A typical call to Techcube Limited starts with a break-in scare or a landlord wanting CCTV before new tenants move in. The London firm fits alarms and camera systems, connecting them so owners can check footage remotely rather than relying on a neighbour to keep watch. It has built up 460 reviews averaging 4.9, suggesting the installs are holding up well over time.
Read more →Families across Ilford and the wider IG1 area call on TEKAPRO for alarm and CCTV installation designed around how a household actually uses its home. The firm has built a strong local following, reflected in a 5-star average across 213 Google reviews, and covers everything from wired systems to smart monitoring setups.
Read more →Alarm and security installation for homes and businesses across London and the surrounding area is the focus of Wentworth Protection Limited. The company holds a 4.9-star rating from 172 Google reviews, reflecting consistent feedback from a broad client base. Its postcode, KT15, places it well for covering both the capital and the outer commuter belt.
Read more →Perfect Secure - CCTV Installation fits security cameras and related equipment for homes and businesses across London. The firm has built up a substantial track record, reflected in a 4.9 rating from 166 reviews, covering system design, installation and setup for properties needing reliable surveillance coverage.
Read more →South London properties, from flats to larger homes, fall within reach of G1 Security Systems Ltd, which installs and maintains alarm and CCTV systems across the capital. Its Croydon base allows for quick call-outs, and a 5-star average from 99 reviews points to consistent workmanship rather than a one-off job done well.
Read more →Across London, Imax Pro CCTV & Security Alarms LTD installs and maintains CCTV systems and intruder alarms for homes and businesses. The company has built a record of 81 reviews averaging five stars, reflecting consistent workmanship on installations across the capital. Enquiries can be made through its website for system design and fitting.
Read more →Intruder alarm systems, wireless alarms, and CCTV installation are the core work of Safe House Security Solutions, which also carries out bespoke alarm design and home security surveys across London. The company holds a five-star rating from 74 Google reviews, and its postcode, RM12 6RA, places it in the east of the city.
Read more →Families and landlords across the SE27 area turn to WLS for alarm systems and security installations tailored to their properties. The company has built a solid local reputation, reflected in a 4.7 rating from 137 reviews, and continues to serve households looking to protect homes and belongings without unnecessary upheaval or disruption.
Read more →Banham Earlsfield installs and maintains alarm and security systems for homes and businesses across south London. The company, part of a long-established security firm, holds a 4.3 rating from 273 reviews, reflecting steady work across installation and monitoring services. It operates from a showroom in the SW18 area.
Read more →A rating of 4.6 from 132 reviews points to consistent workmanship at Absolute Alarms, a security installer serving London. The firm fits and maintains alarm systems for homes and businesses, covering everything from initial setup to ongoing servicing. That volume of feedback suggests a steady, established client base rather than a newcomer to the trade.
Read more →Families across Bromley rely on ICU Security Systems for alarm and CCTV installations tailored to their homes. The firm has built a strong local reputation, reflected in a 4.9 rating from 59 reviews, and works with households wanting straightforward, well-fitted security equipment rather than oversold packages. Its base near BR2 keeps response times manageable for nearby residents.
Read more →Bickley Fire & Security Specialists Ltd installs and maintains fire alarm and security systems for homes and businesses around Bromley. Work covers intruder alarms, CCTV and fire detection, with an emphasis on ongoing servicing rather than one-off fits. The company holds a 4.9 rating from 56 reviews, reflecting consistent attention to detail across installations.
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Add Your BusinessCCTV and intruder alarm installation makes up the core of Eco Security Limited's work in London, covering both domestic and commercial properties. The firm has built a strong local reputation, reflected in a 4.9 rating from 54 reviews. Systems are fitted and configured to suit the specific layout of each site rather than sold as one-size-fits-all packages.
Read more →Tech Vicinity installs CCTV and security systems for homes and businesses across London, working out of the SM1 area. The firm covers cameras, wiring and system setup for properties needing visible deterrents or remote monitoring. It holds a 4.9 rating from 53 reviews, reflecting consistent workmanship on installations across the borough.
Read more →BDG Security describes itself as a full-service security installer, covering intruder alarms, CCTV, access control, door entry, and fire alarm servicing across London. The business also offers alarm monitoring, emergency call-outs, and ongoing maintenance contracts, suggesting a focus on long-term system support rather than one-off installations. It holds a five-star rating across 36 Google reviews.
Read more →Households across Mitcham and the surrounding CR4 area turn to Digitek Systems Ltd for alarm and security installation work. The company fits and maintains intruder alarms and CCTV systems for local families, building a reputation reflected in a 4.9 rating from 40 reviews. Work is carried out with attention to individual property layouts rather than one-size-fits-all setups.
Read more →A 4.9 rating from 38 reviews points to consistent workmanship at Bespoke Detection Services, a London-based installer covering alarm and security systems. The company works on fire and intruder detection setups, with client feedback suggesting reliability across installation and follow-up work rather than one-off jobs.
Read more →CCTV and intruder alarm installation makes up much of Locktec Security Group's workload across London, covering domestic and commercial properties in the IG6 area. The firm handles system upgrades and repairs alongside new fittings, and its 4.8 rating from 46 reviews points to consistent workmanship. Callouts are arranged directly with clients rather than through third parties.
Read more →CCTV installation, intruder alarms, and automated gates are among the core services offered by Abeera, a security installer based in the CR0 area of London. The company also covers access control, fire alarms, door entry systems, and barriers. Rated 4.8 from 46 Google reviews, it serves residential and commercial properties across the capital.
Read more →CCTV installation for domestic properties forms the core of Stillbright Security's work across London, covering camera placement, cabling and remote viewing setup. The firm also fits intruder alarms and access control systems for smaller commercial premises. Its Google rating of 5 from 48 reviews points to consistent workmanship on jobs that often require discreet, tidy fitting.
Read more →UC CCTV installs and maintains CCTV systems and alarm equipment for homes and businesses in Bromley. The company has built a perfect five-star record across 25 Google reviews, reflecting consistent workmanship on installations. Coverage extends across BR1 and surrounding areas, with systems set up to suit individual properties rather than a one-size-fits-all approach.
Read more →Pulsar Vertex Fire & Security Innovations installs alarm and fire security systems for homes and businesses in Bromley. The company holds a 4.9 rating from 29 reviews, reflecting consistency across its installation work. Its services cover system design, fitting and ongoing support for clients across the BR2 area.
Read more →Victorian conversions and newer flats around SM4 make up much of the workload, where rewired alarm circuits and retrofitted CCTV need to fit around existing wiring rather than replace it wholesale. Secured Electrician also handles commercial units needing access control alongside standard security setups. The 4.8 rating from 35 reviews reflects consistent attention to these less straightforward jobs.
Read more →Alarm and security installation for homes and businesses in Sutton, covering CCTV, access control and audio visual integration alongside intruder alarms. Smart Audio Visual & Security Group LTD has built a 4.8 rating from 32 reviews for its installation work across the area. Systems are fitted to suit individual properties rather than off-the-shelf setups.
Read more →Bromley properties requiring alarm systems and security upgrades are covered by Aegis Security Solutions, based locally in the BR1 area. The firm installs and maintains alarm equipment for domestic and commercial clients, having built up a run of five-star feedback across 20 reviews from residents in the district.
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