Established in 1978, Win-Dor is the leading home improvement specialist for the Northampton, Milton Keynes, Buckinghamshire, Bedfordshire and Oxfordshire areas.

We offer an extensive range of windows, doors, conservatories and orangeries; all of which are available in a wide choice of colours, and are backed by our 10 year guarantee.

Ever heard the saying big enough to cope but small enough to care? Well, this perfectly sums up Win-Dor. We're not a big national company that sees each customer as a number, we're a local company that prides itself on going the extra mile for our customers and providing truly brilliant service.

We're also unlike the small one man band double glazing companies that have very little resources behind them. Our sister company is Astraseal, one of the UK's largest window manufacturing businesses. Being a division of Astraseal means we can give you access to a wider product range and can offer you incredibly competitive prices. We employ 32 staff at Win-Dor, including multiple fitting teams, dedicated service engineers and NVQ qualified surveyors from a wider pool of over 250 staff across the whole group.

Contact Details

  City Northampton
  Postcode NN4 7BD
  Address 7, Monarch Courtyard 12 Salthouse Rd
  Phone Number 01604 630 630

Products & Services


When deciding on new windows for you home, it’s important that you choose the right ones for you. Whether you want to match your house’s existing features, or you want your windows to be particularly energy efficient, Win-Dor can offer you a huge selection of styles and specifications to choose from.


Whether you’re looking for a replacement entry door, or a door to open the rear of your house onto a garden or patio area, Win-Dor can offer you a comprehensive range of doors to suit the configuration and style of virtually any home. All of our doors are fully customisable, and can be made to complement our range of windows and conservatories to help you achieve virtually any look you want for your property.


Whether you live in a large country house, period property or bungalow, a conservatory is the perfect addition to any home – adding space, value and light to your property.
Win-Dor offer a wide range of conservatories in both contemporary and classical designs, and we can even create bespoke conservatories from your designs. Additionally, we can offer you a choice of both glass and polycarbonate roofs.

Customer Testimonials

If you are unsure about exactly what you want - then visit the showroom where really sound advice is provided. Often you will consider a product that you may not have first thought was suitable. Nice, friendly, customer focused service with a product that perfectly fits the bill. Two years after my conservatory was built - I knew the best place to go when deciding on some new doors. Highly recommended for overall service and price.

I would like to the various people who have been involved in the installation and to add that they were not only very professional in their approach but also very friendly and we would not hesitate to recommend Win-Dor.

Thank you very much for all the help and excellent service provided to us from your staff and team of contractors. We are extremely pleased with the work carried out in an efficient and professional manner – Well done!


Social Activity

We love getting letters like this from happy customers. This one from Maureen and David Wheeler
Twitter   Full Post ›
Buying windows, doors and conservatories from Win-Dor gives you peace of mind. Find out why here >
Twitter   Full Post ›
Add a sense of theatre to your home with a gable end conservatory
Twitter   Full Post ›
New 36 page brochure dedicated to Windows, Doors & Conservatories out now Download here >
Twitter   Full Post ›
360 degree tours of our double glazing showrooms in #MiltonKeynes, #Bicester & #Northampton here >>
Twitter   Full Post ›
Brigten up you living space with an Orangery from Win-Dor
Twitter   Full Post ›
Recent feedback from Mr Ryland of Witney: Thank you to everyone involved from start to finish, I am very happy with the finished results.
Twitter   Full Post ›
0% Finance options on our Tiled Roof Conservatories
Twitter   Full Post ›