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Welcome to Three SG, we have a wealth of knowledge for all your security and fire requirements.

We provide Security Solutions for Commercial and Domestic properties, either with or without police monitored Intruder / Burglar systems, CCTV, Door Access and Fire alarms within the Essex, Hertfordshire, Kent, London and home counties.

Our systems are Designed, Installed, Serviced and Maintained to a very high standard using the relevant European or British Standards and in accordance with our Inspectorate the ‘NSI’. We provide a 24 hour, 365 days a year call out facility.

If you require further assistance, possibly a survey or maintenance question, for your property please email or phone:

Tel: 01268 204540



Unit 3 Charfleets Farm Way,

Canvey Island,



Three SG is a trading name of SSSG Ltd