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With over 40 years’ experience in the windows, doors and conservatory industry, family-run Martindale Windows are Northampton’s leading home improvement experts. We have built a long-standing reputation within the Northamptonshire area for combining the finest double-glazed products with expert FENSA registered workmanship to seamlessly take your project from concept to completion with the highest possible standards. 

What’s more, because the majority of our windows, doors and conservatory work comes from customer recommendations (a fact we’re very proud of), you can be assured of the quality you’ll receive on your domestic development project. Our window, door & conservatory installation teams work throughout Northampton, Milton Keynes, Bedford, Oxford and beyond, so if you’re looking to get started on an exciting new project in one of these areas, contact us today to arrange a free quotation!

Free Online  Quote

Get an instant online price for windows, doors, conservatories, orangeries & extensions.


No matter what home improvement project you’re looking to work on, we have a tailored solution to suit your needs. If you’re looking for inspiration, you can also visit our new Inspiration Video Gallery below to get some exciting ideas, or discover how you can spread the cost of your project with our range of Window, Door & Conservatory Finance Options.


Finding the ideal Windows for your home can now be easier than ever before with Northampton based Martindale Windows. By supplying the finest range of Windows that the market has to offer, we can help you to find a solution that perfectly matches the requirements of your home.

Using the most stylish and secure uPVC, Aluminium & Hardwood Windows, we can help you to improve the style, security and . From a full set of Flush Sash Windows to Bay & Bow or Triple Glazed Windows, we’ll find your perfect glazing, all backed by our 10 Year Window Guarantee.


Installing the finest quality Doors is the perfect way to enhance the style and security of your home. Whether you require a uPVC, Aluminium or Composite door solution, the range we provide at Martindale Windows and Developments gives you a wealth of choice.

From traditional front doors to ultra-modern Bi-Fold & Patio Doors, we can help you to discover the ideal options for your property. Whether your house is in Northampton, Milton Keynes or further afield, we guarantee Martindale’s expert range will surpass your requirements for years to come.


Looking to create extra space with a new Conservatory? If so then Northants based Martindale Windows can help! We’ll work with you from the early stages of planning to guide you through the necessary regulations needed when considering an extension or conversion of your property.

Using experienced tradesmen and high-quality property improvement products, we will work with you to transform your home and develop the perfect Traditional or Warm Roof Conservatory around your exact requirements.


Perfect for enjoying your garden  all year round, Martindale’s unique range of exterior Veranda’s are the ideal solution for giving your Northamptonshire property a wonderful outdoor entertaining space that can be customised to your individual requirements.

Available in a wide range of sizes and colour finishes, our Veranda’s are made from the finest materials and to the highest specification to last the test of time. With prices starting from £1595 +VAT, our Veranda’s are also extremely cost effective. 

Bespoke Kitchens

With our bespoke Kitchen Design service in partnership with Grand Union Designs, Martindale Windows can help you to design the kitchen of your dreams. Our team of qualified carpenters and kitchen installers will ensure you have the right high-end kitchen to suit you home.

So whether you’re looking for contemporary or traditional kitchen design to improve your home, we will be able to advise on a style, layout and cabinet configuration that’s tailored to your bespoke requirements, providing expert appliances where required.

What our customers say...

  • Always very helpful and a great team of fitters very clean and tidy.Good quality windows and doors great local company.

    PcSupplies UK

    Always very helpful and a great team of fitters very clean and tidy.
    Good quality windows and doors great local company.

    PcSupplies UK
  • Great service from start to finish 😀

    Rachel Vaughan

    The whole company was friendly and very professional.The fitters were quiet and quick. I am over the moon and would recommend them no hesitation

    Many Hands
  • The whole company was friendly and very professional.The fitters were quiet and quick. I am over the moon and would recommend them no hesitation

    Many Hands

    After recently setting up as a sole trader working from home, I was looking to move out of our box room into a larger, more open office, but still work from home. After speaking with Russ and hearing about the Garden Rooms that they’re creating, I decided to use Martindale Windows & Developments to create my new Garden Room, and the result has proved fantastic!

    From the start, Russ, Adam and the rest of the team that Martindale used to make the Garden Room were fantastic. Everything was designed and finished to my exact requirements and everything was left clean and tidy each day after the team were finished for the day. We now have a fantastic office and space to relax within the garden and I wouldn’t hesitate to recommend you to anyone in the future.

    Dan Calvert

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