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10 Year Guarantee

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Made in the UK

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1250+ Checkatrade Reviews

What is a casement window?

A casement window is traditionally one with a hinged sash that opens out like a door. However there are other options for your casement windows and you can choose to instead opt for side hung, top hung or even bottom hung. If you’re feeling unsure at which style to choose then our friendly team have more than 10 years of experience fitting windows in Surrey, Berkshire and Hampshire and will be able to give you all the information you need to make an informed choice about which style is right for you.

Our uPVC casement windows are available in a range of colours and finishes. If you are looking for something to enhance your traditional character property then our wood effect finishes could be ideal – choose from rosewood, mahogany, Irish oak or golden oak. For a more contemporary look, white, slate grey, dark grey or black could be a stylish choice. Or add some quaint English style to your home with our popular cream or chartwell shades.

Three Counties - A-Rated

'A-rated'

Our uPVC casement windows are rated A for their energy efficiency, meaning they can reduce your heating bills and ensure your home retains more warmth in the winter months.

Three Counties - High Acoustic Performance

High Acoustic Performance

All of our windows come with high acoustic performance as standard, meaning you can eliminate unwanted outside noise and create a more harmonious home environment.

Three Counties - Low Maintenance Frames

Low Maintenance uPVC Frames

Unlike wooden frames, uPVC requires virtually no maintenance – meaning they will look fresh and new for years to come.

Three Counties - High Security Performance

High Security Performance

Our sophisticated locking systems mean that all of our windows offer a high level of security for your home.

About Three Counties - Weatherseal Gasket

The World's Best Weatherseal Gasket

The World’s Best Weatherseal Gasket – Our weatherseal gasket plays an essential part in ensuring your windows stand up to even the most extreme weather.

Three Counties - Made to Order

Made to Order

All of our windows are made to order to your exact specification, meaning you are creating a truly bespoke product.

Three Counties - Coloured Windows
Three Counties - Triple Glazing Benefits

Triple Glazing Available

As well as a double glazing option, you can also choose our maximum performance triple glazing for your new windows.

Three Counties - 1- Year Guarantee

Free Comprehensive Guarantee

Have complete peace of mind knowing that our windows all come with a free comprehensive guarantee as standard.

David Bryant
David Bryant
2024-02-14
Very happy with our new door . The support team kept us up to date on everything and the guys on the installation team were early , friendly and professional. Great value all round
Kate Hulbert
Kate Hulbert
2024-02-10
Was looking for a new front door, to replace our tragically 80's monstrosity. The Three Counties website was great as i could see and design the door i wanted and then get a quote for it. The sales team was really quick to respond, and not at all pushy. A survey was easily arranged, to confirm sizes etc and the installer turned up precisely on time, was super friendly, efficient, neat and very tidy. Whole process took about 4 weeks, beginning to end, and I now have the door of my dreams! The only downside is my neighbors keep pestering me for details of who did the job. No hesitation in recommending Three Counties.
Nikki Wade
Nikki Wade
2024-02-09
I'm very happy with my new conservatory - Mark and David did a brilliant job of the build and resolved any issues I had to make sure everything was finished to a really high standard.
Dominic Blood
Dominic Blood
2024-02-09
This is the second time I have used Three Counties , a few years later and in a different house this time. It’s great to see the quality of the windows and workmanship have remained 5*. A stress free installation from start to finish, all windows installed have transformed how our 70s style house looks and now no worries of mould as a result of the old timber framed windows. The Installers who completed our job were amazing, and I mean amazing! Hard working, extremely skilful at their trade, polite and very tidy. Each day when they left they hovered up and left the place in the best condition they could. The whole process from the initial quote , measurements and dealing with the office team before and after the installation has been a true pleasure , if only all businesses were as efficient as this. Highly recommended for anyone considering new windows or any other products they provide and I won’t hesitate to use them again. Thank you Three counties!
Kim Stevens
Kim Stevens
2024-02-04
I shopped around and three counties came in at the most reasonably priced, and I used the buy now pay later option. Really happy with my new door and window, which were both fitted in one afternoon. The customer service was very good throughout and everything went smoothly.
Stuart
Stuart
2024-01-31
I had some windows fitted a few years ago and have recently had a problem with one of the locking mechanism failing. I called 3 Counties, who had a base call out charge, where a lovely lady took my details, refered to my file and we agreed a date when the fitter would come out and inspect the issue. Paul arrived bang on time and was very helpful. He checked the window, confirmsd the issue and promptly fixed it there and then with a replacement part he had on board his van. He was polite and knowledgable. Very efficient. Thank you 3 Counties.
samie dowling
samie dowling
2024-01-25
I had new windows fitted and they look amazing, make such a difference. House is much warmer and soundproof! Staff were very professional, done the job so quickly and cleaned up after. Would definitely recommend.
Ywain Martin
Ywain Martin
2024-01-23
Excellent service throughout the process. Very happy
Victoria Stone
Victoria Stone
2024-01-12
Very happy with our new windows. Fitters were respectful and tidy. From start to finish. Thanks again.