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10 Year Guarantee

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Made in the UK

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1000+ 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.

Paul Wallis
Paul Wallis
2023-10-28
We recently decided to replace our front door, and could not be happier with the result! Thanks so much to Kate, for her time and understanding. Cannot say enough good things about the installation, and Cameron was tidy and efficient. It's been a pleasure to work with Three Counties recently, doors and windows. Many thanks!
Danielle Horsley
Danielle Horsley
2023-10-14
Lovely looking door
Agatha W
Agatha W
2023-09-08
Three Counties have been superb, their customer service is great and their workman were polite, cleaned up after themselves and the workmanship is excellent!! I am very pleased with their work and would happily recommend them.
Tom Winter
Tom Winter
2023-08-15
Excellent service!! We had 21 windows and 3 doors installed and very happy with it all. The process from start to finish was stress free and Ron and Lee who installed the windows and doors were great. Would definitely recommend!
Phil Redhead
Phil Redhead
2023-08-12
Just had my tatty old windows replaced by Three Counties, and it’s been a highly professional job from start to finish. Communication from the administration team was prompt and courteous at all times, and installation ended up being much quicker than advertised projections. Installation was without issue and the lads who did the work were amenable to my requirements and did an excellent job. Very happy with the entire process. Three Counties were recommended to me by friends and I can certainly now recommend them to others.
Mark Boyce
Mark Boyce
2023-07-21
Bought two new windows and a new front door from Three Counties, was very impressed with the attitude of all staff, who were friendly and informative. Price was good, and installation completed without a hitch - very happy with the final product, and would definitely use again.
Paul Picknett
Paul Picknett
2023-06-13
We have just had all our windows (18) replaced, french doors (20 and side panels (2) by Three Counties. We could not be more pleased with their workmanship and the finished product. They left the property incredibly clean after each day, and this despite the messy nature of ripping out old windows and frames. We were kept informed at each stage and a minor snagging issue was resolved promptly and efficiently after installation. A first class service. We would not hesitate to recommend Three Counties.
Anna Trevelyan
Anna Trevelyan
2023-06-01
Three Counties have now installed several windows and doors on our house and they're always my go-to company. I used another before I discovered them and they let me down, but I absolutely cannot fault Three Counties. From the moment you contact them they're courteous and professional, and they keep in touch with timescales and installation times. Friendly installers too, who go above and beyond. You'd think all this great service would cost more but they beat other companies on price. Highly recommended and trusted, I'd never go anywhere else now.