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

Get Directions

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.

Get a Quote

What Our Customers Say

We are rated 5.0 on

on Google

Dependable, responsive, quality workmanship and dedication to getting the project completed. Their customer service is second to none. I would...
Read more

Thankerton Builders

via Trustpilot