25 Best Alarm & Security Installers in London for 2026

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.

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.

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.

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.

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.

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.

Landlords and letting agents managing properties across London use Safe House Security Solutions for alarm installation and upkeep between tenancies. The firm fits and maintains intruder alarms and CCTV systems, working around occupied lets where access needs coordinating. It holds a 5 from 74 Google reviews, reflecting consistent workmanship on repeat instructions from managing agents.

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.

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.

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.

CCTV 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.

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.

A call to BDG Security usually starts with a break-in scare or an insurer's request for better protection, leading to a survey of doors, windows and blind spots before alarms or CCTV are fitted. Based in London, the firm has built a steady record locally, reflected in a 5 star average from 36 reviews.

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.

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.

Landlords and letting agents managing properties around Croydon use Abeera for alarm and security installations across their portfolios. The firm fits systems suited to rented accommodation, from basic intruder alarms to CCTV setups, with 4.8 stars from 46 reviews reflecting consistent workmanship on repeat jobs for property managers.

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.

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.

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.

Across London, National Security Systems Group installs and maintains alarm systems for homes and businesses. Based in the RM3 postcode area, the firm has built up a 4.6 rating from 45 reviews, reflecting steady work in intruder alarms and related security equipment rather than a single flagship product.

A call to DTS London usually starts with a break-in scare or an insurer's request for better cover, leading to a survey and a system fitted around how the property is actually used. Based in the CR7 area, the firm handles alarms and CCTV for homes and businesses, with a 4.6 rating from 41 reviews reflecting consistent follow-through after installation.

This Catford branch specialises in monitored alarm systems for homes and businesses, combining sensors, cameras and a connected response service designed to alert keyholders and, where needed, the authorities. It operates across SE6 and neighbouring areas, and holds a 4.4 rating from 47 reviews, reflecting consistent installation standards and follow-up support.

Landlords and letting agents managing properties around Croydon use NET CAMS LTD for alarm and CCTV installation work that fits rental turnover schedules. The firm handles system setup and ongoing maintenance for portfolios rather than single homes, with a 5-star rating from 13 reviews reflecting consistent service. Work is arranged directly with property managers where access and tenancy timing need coordination.

Refined Security LTD works across London properties ranging from period conversions to newer flats, fitting alarm systems and CCTV suited to each building's layout. The firm holds a 5 star rating from 11 Google reviews. Jobs typically involve assessing existing wiring and access points before recommending equipment, rather than offering a single standard package.

A perfect five-star record from ten reviews accompanies Intercom Services London, a firm working across the capital on door entry systems and related security installations. Jobs range from single residential intercoms to communal entry setups for blocks of flats, with faults diagnosed and repaired alongside new fittings.