More Info >>

Collapsible Gates
Discreet security for all commercial and residential..

More Info >>

Roller Shutters
Protect your building's weak points with our quality roller..

More Info >>

Security Doors
Strongfix security steel doors and frames offer..

More Info >>

Security Grilles
Your windows are your building's weakest point..


Locked out or forgotten your keys? Don’t panic – the expert locksmiths at Costello Security Installers can help with replacement locks.

At some point or another everyone has locked themselves out of their  home or office. As fully certified members of the UK Locksmiths Association, you can trust our team to restore access to your premises quickly and simply.


Call us now
If you have been locked out or otherwise prevented from access to your home or commercial property, call us now on 0333 123 5005. We will dispatch an experienced security engineer to your premises as soon as possible.


We are a fully stocked ISEO R50 Lock agent and provide a 24-hour service and response within 30-60 minutes!
We are available 24 hours a day, 7 days a week. Our experienced and dedicated locksmiths provide a very high level of efficiency, expertise and customer care. We can open 99% of locks with little or no damage whatsoever.


We offer Police and Insurance Approved security products and carry out a variety of locksmith services, including:

  • Composite doors
  • Security doors
  • Door closers
  • Door springs
  • Security Grilles
  • Roller shutters
  • Chubb, Yale, Union, Banham, Assa and Multi-Lock systems installation


Peace of mind
Not only do we have a proven track record of key holding for many homeowners and big businesses, all of our staff undergo routine enhanced CRB checks, to reinforce the reliability and safety of our security work.


Additional services include:

  • Design, manufacture and supply of bespoke composite police approved doors, grilles and shutters
  • Made-to-measure high-security steel doors and frames with a combination of heavy duty fire escape, panic sets or multi-point locking – contact us today for a free quotation.
  • Expert aftercare services, including maintenance and repair of all locks, door closers, floor springs, grilles, gates, and security doors.


Below are the details of some of our most popular security products.

The concealed transom door closer is mainly used on aluminium doors and is perfect for shop fronts among many other applications. This product will significantly reduce the wear and tear that can limit the efficiency and longevity of security installations.


Surface-mounted hydraulic door closers are a versatile and popular choice throughout the residential and commercial security industry. Their ingenuity and reliability means that they can now be found in pretty much every highly established commercial property all over the world.


Timber Doors. We supply and install an excellent range of commercial and residential hardwood doors complete with high security locking, optional automation and various other security features as required. Please consult our friendly and knowledgeable engineers to discuss your security needs.


We offer high quality products, fitted by experienced, reliable installers at very competitive prices. If you are concerned about your security, please contact us for a quotation!

Based in Banstead, Surrey, we provide locksmith services to domestic and commercial customers throughout London and the South East, including locations such as Caterham, Twickenham, Crawley, Balham, Camden, Croydon, Purley, Sutton, Edgware, Hounslow, Harrow, Enfield, Battersea,  Beckenham, Romford, St Johns Wood, Kensington, Chelsea, Knightsbridge, Epsom, Watford, Islington, Kingston upon Thames, Leatherhead, Coulsdon, Dartford, Wimbledon, Reigate, Dorking, Guildford, Woking, Richmond and the City.

If you need a reputable locksmith fast, contact us for an expert service.

Back to Top