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CSS Connelly Security Systems Ltd

CSS Connelly Security Systems Ltd

3.0(10 reviews)See reviews ↓·Edinburgh

About the company

CSS Connelly Security Systems Ltd is a family business established in 1986 by three brothers: Jim, Pat and Paul Connelly. The company opened for business in the summer of 1986 from a small office in Bishopbriggs, Glasgow. CSS was the first security systems company in Scotland to be awarded the quality standard BS5750. It also achieved 'Investors in People', a Scottish first for a security systems company. CSS owns and operates an alarm receiving centre.

The average length of service among staff is 14 years, and many staff have been with the company for over 25 years. CSS has grown through acquisitions of other companies. It provides commercial security solutions including intruder alarms, CCTV, fire alarms and life safety, access control, servicing and maintenance, house builder packages, Intruder DisMist System, retail security tagging systems, and electrical services for businesses.

What customers say

Based on genuine customer reviews

Edinburgh-based CSS Connelly Security Systems Ltd draws on a customer base that stretches back many years, with users describing a relationship lasting well over a decade and service that has remained consistent throughout. Interlinking of smoke, heat and carbon monoxide detection is a task that recurs in feedback, and reviewers highlight how swiftly and cleanly engineers carried it out, often finishing sooner than anticipated.

Response times feature prominently, including a sensor issue resolved quickly and a late-afternoon call to arrange fitting of a replacement battery so that a client was not left waiting until the start of the following week. Engineers are frequently commended for their courteous manner and depth of knowledge, fielding questions about possible future problems. Reception and call centre personnel are likewise singled out as helpful. The firm supplies and maintains burglar and fire alarm equipment, and its electrical installation work is reflected in the range of services listed.

Not every account is favourable. Some reviewers describe difficulties reaching the service department, promised return calls that failed to materialise, and waits of several weeks before learning that works would not go ahead. Others refer to charges taken after cancellation, trouble securing a refund, and maintenance enquiries that turned into attempts to sell extra products, a contrast with the positive experiences of long-term clients.

Burglar alarm shopElectrical installation serviceElectricianFire alarm supplierSecurity system supplier

Reviews

Reviews are taken from publicly available sources.

H
Hayleyb28 April 2026

I gave them notice of cancellation and they still took money. I had to cancel direct debit. Then they tried to tell me that i had not given notice and I had to foward email original sent. They will not refund money and stated illegally i was meant to give 6 months notice of cancellation. Do not deal with this company they only phone you if alarm goes off and do norhing for their over priced subscription

LB
Linda Buchanan22 August 2025

Speedy visit to sort problem -sensor problem quickly fixed but battery required for outside - the first engineer didn’t have one in van . Had a call after five pm to say someone would be round to fit it save me waiting to Monday . Both engineers and call centre receptionists very helpful . We’ve had alarms supplied and serviced by CSS for many years (around 14) and service has always been very good .

AC
Alan Clarke16 October 2024

Very poor customer service and no understanding of lifetime loyalty. We moved into a house with a CSS system from previous owner who had discontinued the contract. We wanted the box on front wall removed to enable masonry work. Although no longer our system/contract CSS wanted to charge £180 as a call out charge to disconnect. Although we will require a security system to be installed following retrofit work ,on the basis of this experience ,we would not consider CSS. We were with our previous supplier for 30 + years. CSS do not understand lifetime loyalty.

BB
Brian Bell8 October 2024

Promised a 'definite' return phone call in response to a query......still waiting.....

WW
Wendy Wilkinson13 November 2020

The linking of smoke, heat and CO alarms has been promptly and efficiently completed by your helpful and charming engineer. No mess was made and it was much faster than we feared. Thank you.

JF
john friel6 November 2020

Have been a customer for the best part of 20 years very professional good service and knowledgeable staff

GM
George Moffat6 November 2020

CCTV & alarm installers in Edinburgh compared

Ordered by rating, weighted by the number of reviews — businesses with only a handful of reviews do not jump to the top automatically. 12 businesses in this category in Edinburgh are compared.

RankProviderRatingReviewsOpen Sat.
1Circle Security★ 5,0573No
2GLD Security★ 5,0146Yes
3Homeland Security★ 5,0120Yes
4RaajCCTV★ 5,079Yes
5Mitchells Scotland Security Systems★ 5,068Yes
12CSS Connelly Security Systems Ltd (this page)★ 3,010Yes
Contact
Working hours
Monday00:00–24:00
Tuesday00:00–24:00
Wednesday00:00–24:00
Thursday00:00–24:00
Friday00:00–24:00
Saturday00:00–24:00
Sunday00:00–24:00