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Contact our professional team today to discuss your project requirements

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Start your online quote

01494 510140

GB Windows is run by Tim Bower who has 35 years experience in the double glazing market. GB Windows have completed installations throughout Buckinghamshire, Berkshire, Oxfordshire and West London, to numerous satisfied customers.

Our dedicated and friendly staff is always on hand to help and advise you, taking you through the sometimes difficult process of making your home look the best it can. We pride ourselves in both our customer relations and great customer satisfaction.

We are based in High Wycombe at 461 London Road, Wycombe Marsh (opposite Costcutters) where we have a showroom displaying our products (opening times Mon – Fri 7:30am till 4pm, Weekends by appointment).

We like to maintain old fashioned values whilst offering you the most up to date products and services. Our professional craftsman’s approach to all our installations means that a large proportion of our business comes from recommendations or add ons from existing customers. We believe that our future lies in your hands, that is why we offer you a complete package, approaching all jobs from your point of view ensuring complete customer satisfaction from start to finish.

All of our installations are covered by a 10 year insurance backed guarantee, which is issued by the Consumer Protection Association (Membership No. 1443). As a CPA member you can be assured that we have met their strict criteria, provide a professional, reliable and ethical product and service, and have proved that we have the ability to produce the highest quality of work. www.thecpa.co.uk

We are Certass registered (No. 001993) in accordance with building requirement “Part L” being a government approved regulatory body, allowing us to self certificate all our installations through building control. Since April 2002 it has been a legal requirement that all domestic replacement window and/or door installations are registered with Local Authority Building Control. http://www.certass.co.uk

On this site you will be able to view all of our products we install with details and images to help you select the right product for your home.

10 years guarantee for added peace of mind

Free, no-obligation quotes

Over 50 years experience

Grainger Bower Windows

4.5

Based on 11 reviews

review us on

Lorenzo mrmo

17:53 30 Aug 23

Great service as usual

Gareth King

14:25 01 Jul 22

Good service from Ash & Tim @ GB Windows.A small wait owing to lead times of materials (5weeks), but this was explained at the time of order. Quoted, priced and installed all within the agreed period, for the agreed price, no nonesense or dramas.

L Hazlem

12:23 25 Feb 22

Nick Ridley

07:56 25 May 21

2nd time using GB Windows and can't recommend highly enough. Great service throughout, great quality windows, great price and fantastic installation.

Ian B

20:28 01 Mar 21

Great service from GB windows, they recently fitted new French doors and a new kitchen door for us. Excellent communication from Steve & Ash to arrange our fitting, and John did a fab job fitting the new doors. Very clean & tidy, good value & a nice finish, would recommend. Thanks guys!

Caz Hebri

19:41 02 Feb 21

This is the third time that we have used Grainger Bower Windows and have recommended their good work to many of our friends. They always finish the installation to a high standard. Steve and Tim both listen to what we need and are both very knowledgeable and always give good advice. Even on an occasion when a window was manufactured in the wrong size, they went above and beyond to sort out a replacement for the next day. My brother in law is an engineer and fussy with tradesman but he also sang their praises. Well done Steve and Tim!

Nikki Dore

18:02 26 Jan 21

Brilliant people to deal with!Extremely helpful, budget aware and try to save you money where possible. Smashing team of fitters, extremely polite, tidy up every evening when they finish. A pleasure to have around. Nothing is too much trouble and will go over and above.Thank you Steve and Tim for a great job!Highly recommended!

Karen Elliott

11:38 06 Dec 20

Very happy with the service provided, Steve was very helpful , courteous and professional throughout the enquiry and ordering process - the windows arrived on time as promised and are of great quality - when other companies were unable to supply due to Covid19 GB Windows went out of their way to help. Installation was done by buidlers rather than GB simply ecause they were fully booked and we are in the middle of some buiding work. We are having an extension built soon and have no hesitation in ordering for supply and fit.

Jacqui Taylor

15:06 02 Feb 20

We found this company extremely rude and unhelpful when we had issues with our 'whole house' installation. Booked appointments for repairs were missed and owner refused to re-book even though they were the ones who were over an hour late, being extremely rude in the process. Our bi-fold doors also had numerous scratches which they were not prepared to do anything about. We would NOT recommend this company to do anything relating to window/door installation.