The Best in the Business

Having been established since 1990 the company has successfully completed more than 40,000 installations. Operating from our depot, which is conveniently located between Newbury and Reading in Woolhampton, we operate throughout the Berkshire, Hampshire, Wiltshire and Oxfordshire counties. We have three sales advisors and a fully trained workforce of over 40 employees, including installers, bricklayers and plasterers.

Castle Windows are registered with FENSA, the Fenestration Self Assesment Scheme for companies that install windows and doors in homes. We are also a registered installer of Pilkington and Pilkington EnergiKare and we are part of the Federation of Master Builders and European Building Confereration.

Why Choose Castle Windows?

Castle Windows have over 40,000 satisfied customers and a large majority of our business comes from recommendations.

We are financially secure and have never traded under any other name or gone into receivership which is key to honouring guarantees on our products and installations.

Castle Windows offer high quality products at the right price with an insurance backed guarantee.

Our sales advisors have years of experience in helping you choose the right products for your home. Our installers are fully trained with some of them being with the business since the company began in 1990. We work with our manufacturers to be innovative in new product development and offer first class customer service.

Who’s Who:

Oliver Byng – Managing Director

James Knight – Sales Director

Rachael Knight – Company Secretary

Luke Thomas – Installations Manager

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Start a Quote

Contact Castle Windows today if you'd like to get an estimated price for any of our products or services. Simply complete the form linked below and one of our team will be in touch as soon as they can.


Very nice company, trustworthy and honest. Good products. Recommended.

Peter Brunsden -

I’ve been a customer of Castle Windows for around 20 years and have always had excellent service , I needed to claim on their warranty recently five years after the door was fitted and it was replaced quickly and efficiently with no quibbles at all.

Rich Fielding -

Great service from start to finish, aftercare brilliant too.

Helen Chalmers -

Brilliant job. Quality of service as well as the products were good. It did take a bit longer than i expected, but the end result more than makes up for it.

Umer Fraz -