Get up to £250 of highstreet/online vouchers - Refer a Friend

Covid - Latest Update

Three Counties - Casement Windows - Specialists in replacement double glazing installations.

Double Glazing Windows

Improve the warmth, security and look of your home

See our windows range
Installations of uPVC Front and Back Doors by Three Counties Ltd

Front & Back Doors

Create a great first impression or bring the outside in

See our doors range
Three Counties - Large range of Orangeries & Conservatories

Orangeries & Conservatories

Create extra living space that looks great

See our conservatories range
Three Counties - Timber Alternative Window

Traditional & timber alternative window & doors

Made-to-measure to your exact bespoke specifications

See our traditional range
FinanceIcon for finance

0% Deposit and Finance

GuaranteeIcon for guarantee

10 Year Guarantee

Uk-madeIcon for uk-made

Made in the UK

ReviewsIcon for reviews

1000+ Checkatrade Reviews

Welcome to Three Counties
Windows, Doors, Conservatories and Rooflines

We are Three Counties. We’re based in Camberley and have been installing high-quality uPVC, timber and aluminium double glazing throughout Surrey, Hampshire and Berkshire for almost 15 years. Whether you’re looking to improve your home with replacement windows and doors, or perhaps a conservatory or modern glass extension, Three Counties have got a superb selection to transform your home.
Download a free brochure

Three Counties - WIndows


We install quality energy rated, high security, uPVC double glazed windows

Our Windows
Three Counties - Doors


View our range of secure, durable & stylish uPVC & arrow composite doors

Our Doors
Three Counties - Conservatories


Add space, add value with a stylish conservatory, orangery arrow or glass extension

Our Conservatories
Three Counties - Sash Windows

Sash Windows

Traditional sash windows that suit your style, your home and your neighbourhood

Sash Windows
Three Counties - Aluminium Windows

Why Choose

Three Counties for your home improvements?

We are incredibly proud of our enviable reputation as trusted local installers; we are totally committed to product quality, customer satisfaction and value for money, and with a Checkatrade score of 9.8/10 you don’t just have to take our word for it! Unlike some double glazing companies, we don’t believe in hard sales techniques or over inflated prices, which is why we’re happy to publish our double glazing and triple glazing prices online and also have a free online instant price calculator.

Home Improvements
Three Counties - Front Doors

Design Your Door

Get an Instant Online Price

You can get an instant online guide price right now. Simply enter your details to get started. You’ll gain instant access to our Dynamic Price Engine, where you can choose different products and compare prices at the touch of a button.

Design Your Door Now
Three Counties - Styles

You are as individual

As your home

Here at Three Counties we believe that customers are as individual as their homes; our range or windows, doors and conservatories are all available in a huge choice of designs, colours and glazing options and each product is made to order to your exact specifications, so whether you have a period property or a modern home, you can be sure to find a style to suit you!

Buy Now Pay Later

On Our 4th Generation Windows

Our 4th Generation windows are our best yet, with more features than ever and prices starting from £28.47 per month for 4 windows.

See our prices
Colin Drumm
Colin Drumm
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
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
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
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
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
Professional installation by the team including brickwork and windows will definitely be using again for other windows at the property
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
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
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