Windows, Conservatories & Doors




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.

    RJ - Hitchin, Hertfordshire

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

    BA - Baldock, Hertfordshire

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

    MT - St Albans, 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