Cost for your windows & doors

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Why Choose Us?

  • Two Decades of Experience
  • Competitive Prices
  • Deliveries from 4 weeks
  • Free Consultation
  • Satisfied Customers
  • 10 Years Guarantee
  • Export enquiries welcome. We export all our products worldwide

Who We Are

One of the UK's biggest sash windows suppliers

At Colin's Sash Windows we offer our products at trade prices direct to the trade and to retail customers.

Our main seller is obviously our uPVC sliding sash windows. Colin's Sash Windows is best known for disrupting the upvc sash window market in the UK in 2014 by introducing affordable fixed prices for upvc sash windows in the UK. Before this they were generally only available at very high prices through window installers. The quality of our sash windows is excellent. Starting at £270 plus VAT for white and £337 plus VAT for standard woodgrain colours, we are often asked if the quality is good because of the low prices. Over 40% of our business is from repeat customers (this doesn't include recommendations). We think that speaks for itself.

Because of demand from our customers we don't just sell sash windows. We supply one of the most sought after products in the window industry this decade - we are market leaders in cheaper alternatives to steel windows and french doors. Interior Aluspace doors and partitions that are almost as slim as steel and external steel look aluminium Smart Systems Alitherm Heritage Steel Look Aluminium French Doors and windows. These are now our second biggest seller. We have an unrivalled knowledge of these products and possibly the best prices in the UK.

One of our other best sellers are the uPVC flush casement windows. We have very low prices with fast delivery on these.

If you use social media check out our Facebook page. It's one of the busiest Facebook pages in the window industry and shows recommendations and photos from customers. The same with Instagram.

In 2022 we had around 1600 orders handled by a small but highly qualified team in the office that will offer personal service to all enquiries. We have unrivalled knowledge of the products we sell. Call us today on: 01525 552131 or email

Our Products

Windows and Doors


Testimonial Person

"We used Colin's Sash Windows to replace a single sash window. Local suppliers did not want the job or quoted alarming prices. Colin's supplied a quality window at a good price, helped us with the measurements which we managed to get right and kept us informed of what was happening. The window was delivered in the time scale promised. Highly recommended."

- Roger Corke
Testimonial Person

"I would not hesitate to recommend this company. Colin responded immediately to a telephone enquiry about pricing and technical information. The company then followed up within 24 hours with a detailed quotation for 47 box sash windows in varying sizes and configurations. Their price beat all other so-called ‘trade’ prices that we had received for the same Synseal Evolve box sash windows. Within a fortnight, the windows arrived for our builder to install. Despite being the cheapest, their service has been absolutely faultless."

- Nina Keats
Testimonial Person

"Bought 4 sash Windows. I was concerned about the quality as the price was reasonable, but after fitting them myself they look fantastic, good quality and perform very well. The windows are in Chartwell, green wood effect UPVC, they look as good as timber windows, can't tell the difference until you get close. I would recommend Colin's Sash Windows to any one!"

- Ray Corey
Testimonial Person

"I just wanted to say how happy we were with our new UPVC window from Colin's Sash Windows. The whole process was so easy from ordering to delivery. Colin and his team were really helpful and very professional. The window was beautifully finished and looks wonderful in our bedroom. We have already recommended Colin's windows to a couple of friends. 5 stars!"

- Caroline Bernstein
Testimonial Person

"I was very dubious about this company mainly because the windows appeared so cheap. You know what they say, buy cheap, buy twice. It appears it’s almost like a husband and wife setup ( I could be wrong) . But they respond immediately and were great. Was so nervous when the Windows upvc sash turned up. But they look fantastic. Had Georgian bars put in with chrome fittings. They Don’t look as genuine as the some of the high end onesBut costing about £700 each. But trust me you'll be pleased, well worth the money, and quick delivery.. Thanks Colin."

- Michael Florey
Testimonial Person

"Friendly and very helpful with fast turnaround of my order and will also be ordering more Windows very soon."

- Andrew Birch
Testimonial Person

"Great service and doors with excellent quality! I am really happy that I choose Colin and his team to assist me. The new french doors are perfect. I will use his service again."

- James Owen
Testimonial Person

"The aluminium bi-fold doors from Colin's are one of the best purchases that I've made. There is no compromise on the quality and the price is right. Thanks for your amazing assistance, Colin!">

- Stanley Cook
Testimonial Person

"I had some really bad experiences with other companies selling doors online, but finally I've found the right supplier. Colin's Doors provide top service at affordable price. The support team is great and Colin himself helped me with some measures. Thanks a lot! "

- Louisa Barnes

Get In Touch

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Contact Info

Working Hours 8:00 AM - 8:00 PM, Mon - Sun

WhatsApp 07930 098867

Fax 01525 552141

We Accept

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