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

Covid - Latest Update

Three counties - windows
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

Explore Windows by Style

We have been fitting energy efficient double glazing and triple glazing across Berkshire, Surrey and Hampshire for more than 10 years and are the experts when it comes to helping you select the new windows that are perfect for you.

Three Counties - Casement WIndows

uPVC Casement Windows

Our most popular choice of replacement double glazing due to its energy efficiency, affordability and versatility.

Three Counties - Sash Windows

uPVC Sash Windows

Add some quintessentially English style to your living space with our beautiful sash windows.

Three Counties - Flush Casement WIndows

uPVC Flush Casement Windows

Our flush casement windows are a contemporary alternative to traditional uPVC windows.

Three Counties - Bay and Bow WIndows

uPVC Bay & Bow Windows

uPVC bay and bow windows give the feel of a traditional wooden bay window and are a beautiful choice for adding lots of light your home.

Three Counties - Tilt and Turn WIndows

uPVC Tilt & Turn Windows

Our uPVC tilt and turn windows are truly versatile and are an aesthetically stunning addition to your home.

Coloured Windows

Our uPVC windows don’t just come in white - start browsing the beautiful coloured window options available to you.

View Our Range

Triple Glazing

Make your home as efficient as it can be with our ultimate triple glazed windows.

View Our Range

Why choose Three Counties for your double glazing?

We have been fitting double glazing in your local area for more than 10 years and are the experts in Berkshire, Surrey and Hampshire. Each window we fit has been tailormade, is fitted to a very high standard and we offer a free comprehensive guarantee to give you peace of mind.

About Three Counties - Weatherseal Gasket

What are the benefits of double glazing?

By having double or triple glazing added throughout your home, you will eliminate any drafts caused by your windows – meaning in the winter months your home will feel much warmer. In turn this will also mean that your energy bills will reduce – due to your home retaining a lot more heat and there being less need to turn the heating up. Double glazing will also make your home more secure and will reduce any unwanted outside noise.

Double glazing is not just practical, it’s also a beautiful way to update the look and feel of your home inside and out. With a range of different materials, finishes, styles and colours, our double glazing will give your home a fresh new look.

Three Counties - Triple Glazing Benefits

What’s the difference between double glazing and triple glazing?

Choosing double glazing will mean your home is warm and draft free but if you want that extra layer of warmth then triple glazing will hold onto the heat in your home even more. If you are unsure which is best for you then one of our experts will be happy to help.

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