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Welcome to 3 Shires Glazing
Olney’s windows & doors company

01234 712242 or 01908 980068


As a leading window and door company based in Olney, we have almost two decades of domestic and commercial experience behind us. So, whether you’re looking to repair misty double glazing in your home, secure hundreds of uPVC bi-fold doors for new builds or simply want to transform your conservatory into a thermally efficient extension, no job is too big, small or complex for our talented team.

What we do


Like many historic market towns in England, Olney is blessed with a diverse range of homes, from classic terraced houses full of Victorian splendour to modern homes with lavish green surroundings. We’ve been fortunate to have been trusted by a huge range of homeowners to repair or replace the windows and doors in their homes to maximise security, style and functionality. With straightforward pricing, free quotes and advice available, we’re regularly providing the following services:

  • uPVC Double Glazing
  • Security doors and windows
  • Window, door and conservatory repairs
  • Bi-folding doors
  • Tilt and Turn windows
  • Conservatories
  • Thermally controlled roof systems
  • Guardian Roof replacement
  • Repairs for misty double-glazing
  • Locksmithing and lock repairs


3SG is ideally situated to London, and we’ve developed many strong relationships with businesses in the capital as well as the Home Counties. We’ve carried out hundreds of commercial glazing, window and lock repairs for our diverse customer base. This includes public and private sectors, such as retail, hospitality, hotels, restaurants, housing associations, schools, care homes, management companies, NHS, construction and letting agencies. Our goal is to help you pave the way for a safer, more secure and happier working environment for you, your staff and your customers. These are just a few of our many commercial window and door services:

  • uPVC Double Glazing
  • Security doors and windows
  • Schuco doors and windows
  • Managed service contracts
  • Window and door repairs
  • Bi-folding doors
  • Tilt and Turn windows
  • Repairs for misty double-glazing
  • Locksmithing and lock repairs

Why choose us?

When our journey began in 2001, we wanted to offer customers an approach to windows, doors and conservatories that was refreshingly different and not centered on ‘pushy sales’ tactics. We’ve always taken steps to ensure our customers are 100% happy with the work carried out on their home or commercial property, and we’re pleased to have developed a reputation as a reliable, honest and helpful door and window company in Buckinghamshire. If you’re looking to improve your property with any one of our services, here are a few reasons why you should choose 3SG:

  • Free written quotes and advice
  • Straightforward pricing with no hidden costs
  • We do not employ sales people
  • FENSA approved
  • Guardian Warm roof certified
  • Full Public Liability Insurance
  • No job is too large or difficult for our talented team
  • Nearly two decades of experience in the window and doors industry

Contact Us

Call Us

01234 712242

01908 980068

Where we are

Three Shires Glazing,
48 Elmlea Drive,
Olney, MK46 5HX