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Steel Security, Fire Exit Doors and Security Gates


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Costello Security Commercial Made to measure Steel Doorsets

Depending on your line of business, professional appearance or extra enhancement of security will both be priorities to differing degrees. As you can see in our commercial security doors gallery, our product range has more than enough variation to provide a fitting solution that matches any commercial environment.


Experience in all sectors, giving you peace of mind

Costello Security Installers provide a huge range of security doors to an extremely diverse range of commercial businesses, including many blue chip clients, large and small construction companies, NHS and private hospitals, government departments, local councils, architects and small and large commercial property owners.

We believe this diverse client base strongly demonstrates both the versatility and professionalism of our security service as well as the level of satisfaction that our commercial customers enjoy.

We are delighted that much of our on-going trade is generated through repeat business and keen recommendations resulting from our previous security installation, maintenance or repair work.


Key features of our commercial security doors and frames:

  • Made-to-measure security doors and frames
  • Optional glazed viewing panels, side panels and over panels
  • Exceptional 11-point security locking including 4-hinge connection with 17.5mm bolts
  • Electronic locking via maglocks and keypad entry
  • High performance solid stainless steel lever handles
  • Attack resistant anti-jemmy overlap edge strip and escutcheon plates
  • Heavy duty stainless steel hinges certified to BS.EN1935.2002 grade 11 standard
  • Industry approved Assa Sash locking system with deadlock options
  • 3 security levels available: Strong-fix 12, 16 & 20 with 2 hour fire rated function
  • Spy holes, letter boxes and door closers
  • Single and double panic bar options for fire exits with 3-point security locking system
  • Powder coat finish to our many standard stock colours. RAL numbers on request


Based in Banstead, Surrey, we provide industry leading commercial security door installations to customers throughout London and across the South East, encompassing Twickenham, Caterham, Crawley, Camden, Balham, Croydon, Sutton, Purley, Edgware, Harrow, Hounslow Battersea, Beckenham, St Johns Wood, Romford, Richmond, Chelsea, Epsom, Knightsbridge, Kingston upon Thames, Islington, Kensington, Leatherhead, Coulsdon, Enfield, Wimbledon, Watford, the City of London, Dorking, Woking and Reigate.


We offer high quality security doors and fire exit doors, fitted by experienced, reliable installers at very competitive prices. If you have any security concerns or questions, please do not hesitate to contact us for a free quotation or advice!

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