Scotland's Trusted Glazing Installation Specialists
Century 21 has been manufacturing and installing aluminium windows, doors and glazing systems across Scotland since 1978. Every installation is carried out by our own skilled fitting teams – ensuring the quality of your product is matched by the quality of its installation.
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.
A Seamless Process From Survey To Completion
Every project begins with a thorough site survey and detailed consultation. We take precise measurements, assess structural requirements and advise on the right system for your building – so there are no surprises on installation day.
Our fitting teams are experienced across residential and commercial projects of all scales. Whether you’re replacing a single window or fitting glazing across an entire development, we work efficiently, cleanly and to a clear timeline – keeping you informed at every stage.
Manufactured In-House, Installed by Our Own Team
Unlike companies that outsource their fitting, Century 21 manufactures your aluminium windows and doors and installs them using our own directly employed tradespeople. That single thread of accountability runs from your initial enquiry through to the finished installation – meaning one team owns the quality of the entire job, start to finish.
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
