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Three counties - casement windows - specialists in replacement double glazing installations.
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0% Deposit and Finance

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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.

Available in a Range of Styles and Designs - Our uPVC casement windows come in a range of colours and styles so you can choose the look that suits your home and your taste..

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.

Colin Drumm
Colin Drumm
2022-04-14
We used Three Counties to replace our front door and porch. Throughout the process, from design, quote, survey and installation the service and level of communication has been fantastic from all involved. The installation team were great, friendly and courteous, working cleanly and tidying up after themselves. We would have no hesitation using Three Counties again, or recommending their services.
Clare Rogers
Clare Rogers
2022-03-29
Fantastic service from start to finish. Kept me upto date all the way through the process. Very prompt coming out to measure up and discussing what windows I would like. The install was done professionally by a fab team (James and Josh), cleaned and tidied as they went, friendly team. Would highly recommend
Donata Noad
Donata Noad
2022-03-28
Very happy with Three Counties. That’s the second time we have ordered services from this company and both times it was flawless. Prices are very competitive, customer service very good and workmanship excellent. I trust this company 100% and will be definitely be using them in the future. Paul, gentleman who fitted the door, done an amazing job. There is nothing there that person like myself (with slight touch of OCD) would have an issue with. Highly recommended local company that you can trust.
Steve Colvin
Steve Colvin
2022-03-17
We replaced all windows and doors with 3-Counties. Efficient and tidy, the workmanship is great. Very happy with experience of using them and wouldn’t hesitate to recommend them
Paul Thompson
Paul Thompson
2022-02-15
We used Three Counties to replace 7 windows at our property in February 2022. From the initial quotation, through survey to installation I was extremely impressed with them. The installation was completed by Dan and Cam who I cannot praise highly enough. Their workmanship and attention to detail / finishing was exemplary. They were polite and worked hard / efficiently to complete the job in 1.5 days. They took great care to protect carpets and furnishings whilst working and spent time tidying up, leaving the property very clean. I would not hesitate in strongly recommending this company.
Ryan Wel
Ryan Wel
2022-01-14
Professional installation by the team including brickwork and windows will definitely be using again for other windows at the property
MissS
MissS
2021-12-09
Excellent service all round from Three Counties. I fully recommend this company, the fitters Ron and Liam were brilliant, thorough, polite, continually clearing everything away, very tidy, helpful, punctual and never wasted time. The windows and doors are great, one very happy customer.
John White
John White
2021-12-07
The quote was the price (no hidden extras).The quality of the doors we purchased and the fitting of them was top notch It is nice to find a company that keeps you informed as regards fitting etc at all times We had a problem through no fault of 3 counties and they sorted it efficiently and effectively.We were kept up to date at all times. I have no hesitation in recommending them to anybody thinking of any form of double glazing. This revue would not be complete without a big thankyou to Kate and the fitters.
Tim Padday
Tim Padday
2021-11-17
We are so pleased with our new bi-fold doors supplied and fitted by Three Counties. The job was done professionally and in the time frame provided. Dan and Cam took the upmost care on installation to ensure everything was perfect and they were a pleasure to deal with. Credit to the administration team also who kept us fully informed of the process and schedule. I would highly recommend Three Counties for their workmanship and already have to our friends, who have employed them to do their conservatory