Established in 1978
Trusted by commercial clients across Scotland for over 45 years of manufacturing and installation expertise.
Your Local Window and Door Showroom in Scotland
Step inside the Century 21 showroom and see our aluminium windows, doors and glazing systems first-hand. Call us or visit to speak with an expert today.
10 Bairds Crescent, Allanshaw Ind Est, Hamilton, ML3 9FD
Glazing manufactured in-house
Every system is fabricated to your exact specification - no third-party assembly, no compromise on quality.
Premium systems
We manufacture and supply only the very best systems and partner with some of the most respected names in the industry.
Scotland-wide coverage
From a single commercial door to a full curtain wall installation, we deliver across Scotland.
Visit our Showroom and See the Quality in Person
Touch the products, explore the finishes and talk to our team before you commit to anything. We’re here to help you make the right decision for your home.
10 Bairds Crescent, Allanshaw Ind Est, Hamilton, ML3 9FD
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View our gallery
Our gallery is the ideal place to browse product photos and find the perfect fit for your next project. If you have any questions, please don’t hesitate to get in touch.
Speak To Our Friendly Team
Choosing new windows or doors is a long-term investment. Seeing profiles, finishes and hardware in person gives you a level of confidence that no brochure or screen can replicate – you can open, close and compare systems side by side.
At Century 21, our showroom is set up to help you make an informed decision. Whether you are a homeowner planning a renovation or an architect specifying for a commercial project, our team will guide you through the options that suit your brief.
Serving Domestic and Commercial Clients Across Scotland
Century 21 has been manufacturing and installing aluminium glazing systems for domestic and commercial clients across Scotland since 1978. Our showroom reflects that breadth of experience – from residential replacement windows to curtain walling and shopfronts.
Whether you are upgrading a family home or working on a large-scale commercial build, our team understands the full scope of what aluminium glazing can deliver. Come in and see the quality of our workmanship for yourself.
What Our Customers Say
We are rated 5.0 onThank you for our fantastic new front door and back patio doors. The finished quality is brilliant and quick time...
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Craig Noble
via Google
Century 21 fitted two new windows and an entire new porch & front door for us recently and we are...
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Amy Rebecca Kettles
via Google
We are so so happy with our Bifold doors! The quality is first class and the support from the company...
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Chloe Semple
via Google
Thank you for our fantastic new front door and back patio doors. The finished quality is brilliant and quick time both were fitted was amazing.
Craig Noble
via Google
Century 21 fitted two new windows and an entire new porch & front door for us recently and we are delighted with the results! Ross provided a fantastic consultation and gave us direction on what would look best and complement our Edwardian property. They did a fantastic job and were really lovely guys to have around, would recommend to anyone looking for amazing service and great craftsmanship!
Amy Rebecca Kettles
via Google
We are so so happy with our Bifold doors! The quality is first class and the support from the company themselves we couldn’t have asked for more! Ross was more than willing to take the time to discuss our options from different colours to the different set up. When it came to installation the boys were friendly and I could really tell the pride they took i fitting the doors perfectly! Would fully recommend!
Chloe Semple
via Google
