We are proud of the Quality Windows, Doors and Conservatories that we supply and the quality of our workmanship. Here are some comments from our customers.

I had a new front door installed recently. Installation was fast and very tidy.

A manufacturing fault was handled without fuss and they went out of their way to make sure that it was dealt with and installed as quickly as possible. Really pleased with the result, the level of communication, and the service overall.

RJ - Hitchin, Hertfordshire

Knebworth Windows replaced all the windows, front door and back door of my house and their work was exceptional.

They were punctual, clean and tidy and completed the work quicker than anticipated. When one window wouldn’t close due to a mechanical hinge failure, Dave came out at the weekend and replaced it immediately. Highly recommend Knebworth Windows, a first rate Company.

BA - Baldock, Hertfordshire

We were delighted we chose Knebworth Windows to replace our old leaky Patio Doors

They suggested some absolutely stunning Full Width Folding Doors. They've been open all summer long! Thanks guys!

MT - St Albans, Hertfordshire

We have worked with Knebworth Windows for a number of years now and engaged their services on numerous jobs. We have always found them to be reliable, knowledgeable and good value for money.

Dave will go the extra mile to ensure our customers are satisfied with the end product and react promptly to any queries they may have. I have no hesitation in recommending Knebworth Windows.

AN - Stevenage, Hertfordshire

I can whole-heartedly recommend Knebworth Windows.

Great advice and service and some minor issues with the front door lock were sorted promptly.

J - Knebworth, Hertfordshire

Our experience with Knebworth Windows was one of professionalism and competency

We replaced all of our windows and doors in our family home, from the point of quotation through to installation we were kept in the picture at all times. We experienced very little disruption during the installation which was key with a young family. The overall price was extremely competitive with exceptional results! We would definitely use Knebworth Windows in the future.

SP - Welwyn, Hertfordshire

I have used Knebworth Windows for a new conservatory and replacement windows.

This company is very reliable works to a very high standard and I would certainly recommend them to other people. The works were completed on time and without any problems.

DG - Hitchin, Hertfordshire

Dave at Knebworth Windows recently visited a vehicle impact damage job for me, to make safe and replace two windows at two separate properties.

Both windows were of specific design and had to be colour matched accordingly. Dave was very reactive upon instruction and liaised with both owners promptly with great communication and quality of works throughout, both at the initial visit and make safe stage through to final installation. Both owners were very happy with the final outcome. This is just one of numerous jobs of varying size and complexity Dave has carried out for me over the years ranging from composite doors, windows, UPVC cladding and full conservatory installations, only positive comments, a great service all round.

LD - WGC, Hertfordshire


Can I Really Save Money Replacing My Windows?

Yes! We can help you save on average £250 per year on your household energy bills just by supplying and fitting brand new replacement energy rated windows - we have lots of styles and colours avilable to suit your home, and save you money.

Will New Windows Make My House More Secure?

Absolutely! We can supply and fit a wide range of security options as part of replacing your existing windows.

Can We Have UPVC Sash Windows?

Yes we can replace your wooden Sash Windows with modern, secure, energy efficient UPVC Sash Windows - We can supply and fit UPVC Sash Windows in a wide range of colours, wood effect, and even white on the inside.

Do You Have Different Types Of Conservatories?

Our conservatories are available in various styles - We can show you the full range of styles, colours, finishes and security options talk to us 07880 712525

Do You Do A Warm Roof Conservatory Option?

We can supply and build you the conservatory of your dreams in any shape or size, with a warm roof option!

Is Your Work Guaranteed?

Absolutely Yes! All of our work is gauranteed and is fully insurance backed.

About Us

Knebworth Windows are based in Knebworth, Herts and have over 20 years of experience in the UPVC Double Glazing Business.

All of our fitters and installers are qualified to the highest standards, they are clean and tidy, reliable, experienced and honest - Our team are able to fit Porches, Lead Work, Brick Work, Gutters, Facsia & Sofits and Building Work.

We are currently improving homes near you.

Knebworth Windows

  • Over 20 years experience
  • Fully qualified, knowledgable, professional
  • All of our servcices are fully insured
  • We are clean, tidy, honest and reliable