17 Best Alarm & Security Installers in Cardiff for 2026

A 4.9 rating from 319 reviews sets Twenty4 Fire & Security apart among Cardiff's alarm and security installers. The firm covers fire and intruder alarm systems, CCTV and related security installations for homes and businesses. That volume of consistent feedback suggests reliability across repeat callouts and maintenance work, not just first-time fits.

Burglar alarms, CCTV systems, and access control installations are the core offer from Sonic Alarm Systems Limited, covering both residential and commercial properties across Cardiff and the surrounding South Wales area. The company holds a five-star rating from 159 Google reviews, which points to consistent installation standards rather than a one-off result.

Express Locksmith Cardiff installs and services alarms and security hardware for homes and businesses across the city. The firm has built up a strong reputation locally, reflected in a 4.9 rating from 148 reviews. Work covers lock upgrades, alarm fitting and general security improvements for properties in the CF23 area.

Cardiff properties, from flats to larger family homes, fall within Greenpoint Security Ltd's fitting range for alarms and CCTV. Work covers system design through to installation, with call-outs arranged across the city and surrounding areas. The firm holds a five star rating from 67 reviews on Google.

Smart alarm integration with app-based monitoring is the focus at ProTec Smart Solutions, serving Cardiff households and businesses from its CF14 base. The firm links CCTV, door entry and intruder alarms into a single controllable system rather than fitting standalone units. It holds a five-star rating from 53 Google reviews.

Calls to One2c often start with a household or office wanting CCTV or an alarm system fitted after a break-in scare, or simply to replace an outdated setup. The Cardiff firm surveys the property, fits cameras and alarms suited to how the space is used, and talks clients through the controls afterwards. It holds a 5 star rating from 39 reviews.

RH Fire & Security Solutions installs intruder alarms, fire alarms, and access control systems across Cardiff and the surrounding area. The company also covers CCTV, door entry, emergency lighting, and panic alarms, making it a single point of contact for both fire safety and security fit-outs. Rated five stars across 34 Google reviews, it operates from the CF5 postcode.

A perfect 5 from 28 reviews sets Protec Security Systems apart among Cardiff's alarm installers. The firm fits and maintains intruder alarms and CCTV for homes and businesses across the CF14 area, with reviewers pointing to clear communication and neat installation work as recurring themes.

Intruder alarm installation is the core of STS Alarms' work, covering wired and wireless systems for homes and businesses across Cardiff. The CF3 firm also fits CCTV and access control alongside its alarm work, and has built a record of 5 stars from 21 reviews. Call-outs for maintenance and repairs are handled alongside new installations.

FSE Group Ltd installs and maintains alarm and security systems for homes and businesses across Cardiff. Work covers intruder alarms and CCTV setup, with ongoing support for existing systems. The company holds a 4.7 rating from 27 reviews on Google.

Wisenet Security Ltd works largely with period properties and converted flats around Cardiff, where older wiring and layouts need careful planning for alarms and CCTV. The company also fits systems in newer builds and small commercial units, with 14 reviews giving it a full five-star rating on Google.

Alarm systems and CCTV setups for domestic properties make up much of the work at Crystal Smart & Security, based in Cardiff. The firm also fits smart locks and video doorbells, tying them into existing home networks where required. Its 5-star rating from 13 reviews points to consistent workmanship across these installations.

Louch Limited focuses on the installation of intruder alarms and CCTV systems for homes and businesses across Cardiff. Louch Limited also handles maintenance and servicing of existing security equipment, ensuring systems continue to operate correctly. The company is based in the CF14 area of the city.

Concept Fire & Security Solutions works mainly with commercial units and larger residential blocks in Cardiff, fitting fire alarm and security systems that need to meet specific compliance standards. The company handles both new installations and upgrades to existing systems, with a 4.1 rating from 16 reviews reflecting steady, workmanlike output rather than volume.

CCTV installation forms the core of Future CCTV & Security Systems Limited's work, covering camera setup, monitoring and maintenance for homes and businesses around Cardiff. The company also fits intruder alarms as part of wider security packages. Based in the CF64 area, it serves clients across the city and surrounding districts.

Across Cardiff and the surrounding area, JDS Fire, Security & Electrical Solutions Ltd handles fire, security and electrical installation work for domestic and commercial premises. The firm covers alarm systems alongside wider electrical fitting, giving clients a single point of contact rather than separate contractors for each job. It holds a 4.2 rating from local reviewers.

SGD Group describes itself as a full-spectrum security operation based in Cardiff, covering everything from home security and fire detection systems to guarding, patrols, and keyholder response. Fire prevention maintenance and networking solutions also feature in its listed offering, giving the company a broader technical footprint than many alarm installers in the area.