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

We provide security solutions for commercial and domestic police monitored Intruder / Burglar systems, CCTV, Door Access and Fire alarms within the Essex, Hertfordshire, Kent, London and home counties.

Our systems are Installed, serviced and maintained to the relevant European or British Standards in accordance with our Inspectorate the ‘NSI’ providing a 24 hour call out facility 365 days a year.

If you require a survey 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