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Bespoke Glazing for Your Home
Century 21 manufactures and installs premium windows and doors for homeowners across Scotland. Whether you’re replacing tired frames or transforming your home with a stunning new entrance or bifold system, we handle everything in-house – from design to fitting – using only the finest systems available.
Manufactured in-house
Premium aluminium systems
Domestic and commercial
Our Products
Windows
Aluminium windows built to last - bespoke manufacture and expert installation across Scotland.
Doors
Aluminium doors designed for performance, security and lasting beauty - from entrance doors to expansive bifold glazing systems.
Internal Doors and Screens
Redefine your interior spaces with slim-profile aluminium partitioning - beautifully engineered, acoustically effective and built to last.
Roof Lights
Bring natural light deep into any build with precision-engineered aluminium roof lights, designed for lasting thermal performance and clean, modern aesthetics.
Residential Glazing Systems
From a striking new entrance to new thermally-efficient windows, our team has the experience and capacity to deliver. We supply and install glazing systems for homeowners across Scotland, turning houses into dream homes.
View our Latest Projects
See The Results for Yourself
Every project we complete is a reflection of our craftsmanship. Browse our gallery to see the quality of our aluminium window and door installations across a wide range of Scottish homes and buildings – from contemporary new builds to period property upgrades.
Our Process
Step 1
Enquiry
Get in touch with our friendly team and share the details of your project, we're happy to answer any questions and guide you through the next steps.
Step 2
Consultation & Technical Support
During our consultation, we offer technical support and work with the project architect to advise on the best systems for your project.
Step 3
Showroom Visit
Visit our showroom to see our range of products up close, and enjoy a one-to-one consultation to help find the perfect solution for your home or project.
Step 4
Quote
We'll provide a full, detailed quote tailored to your requirements, including survey and installation costs where needed, so there are no surprises.
Step 5
Installation & Aftercare
Our experienced, in-house fitting team will carry out your installation to the highest standard, with ongoing aftercare and advice available whenever you need it.
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 DirectionsFrequently Asked Questions
Below we have answered some of the most common queries we receive from homeowners. If you can't find what you are looking for, get in touch with our team directly.
While we primarily work with aluminium systems, we are also able to offer ali clad products, as well as uPVC and timber upon request. To find out if we are able to offer the material of your choice, please speak to our team.
The belt of Scotland; stretching from Edinburgh, Glasgow, Paisley, Stirling, Falkirk, Cumbernauld, Livingston & Bathgate Contact our team to confirm coverage for your specific location and project requirements.
We work with Smart, Cortizo and Finstral - all industry-leading systems chosen for their thermal performance, durability and design flexibility.
Most domestic installations are completed within one to three days. Larger or more complex projects may take longer - we'll confirm timescales after your survey.
Yes. All our installations are backed by manufacturer and workmanship guarantees. Speak to our team for full details on the warranty applicable to your chosen system.
Absolutely. Visit our showroom to view live product displays, or browse our online gallery to see completed installations across a range of Scottish homes and projects.
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
