Windows and Doors Milton Keynes & Northampton

Welcome to Fenster Glazing

Fenster Glazing wants to make your dream home a reality.

We are a market leader in offering premium glazing options for both residential and commercial buildings. With years of industry experience under our belts, we boast a dedication to exceptional craftsmanship that’s unmatched throughout Bedfordshire and Hertfordshire. 

Our superior uPVC and aluminium window and door solutions improve the beauty, efficiency, and security of your space. We provide a wide range of glazing options because they can be tailored to meet your specific design tastes.

Our team of talented experts is committed to realising your vision, whether you’re looking for beautiful doors, energy-efficient windows, or bespoke glazing solutions.

We supply and install quality double glazed windows and doors in Milton Keynes, Northampton, Ampthill, Toddington, Leighton Buzzard, Buckinghamshire, and the surrounding Bedfordshire and Hertfordshire areas. 

Get in touch with our expert team. We’ll help you design your perfect windows and doors today!

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Customer Service You Can Trust

Customer service will make a huge impact on your own home improvements journey. Here at Fenster Glazing, we’re dedicated to leaving every customer completely satisfied with their new windows and doors. Going above and beyond other double glazing companies, we’ll take time and care to get to know you and your home. Your home will look better than ever with Fenster Glazing.

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Entrance Door Installation

Make An Entrance

Use our innovative door designer to create the entrance of your dreams. Choose everything from handle styles to your own bespoke letterbox. Leave nothing to chance with our state of the art security. Whether you are looking for a particular glazing option or want a special hardware feature, our door designer allows you to make the ideal door for your home.

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uPVC Windows and Doors

Thermally Efficient uPVC Windows and Doors

Fed up with draughts and cool temperatures inside your home? Then it might be time to upgrade to uPVC home improvements. All across the UK, including right here in Milton Keynes, homeowners are choosing uPVC windows and doors for their homes to increase thermal efficiency. With these new front entrance doors and double glazed windows, your home could be at a more consistent temperature throughout the year. You could even see a reduction in heating bills!

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SureFlap Cat Flap

The SureFlap Cat Flap

also offer state of the art SureFlap cat flaps, the perfect solution to keep your cat safe while also offering freedom. The innovative system allows your pets to freely move between the interior and exterior of your home. A microchip in the collar means the flap will only open for your feline friend. This will help keep your home safe from potential intruders. If you're looking for a cat flap that grants freedom without any of the hassle, choose SureFlap.

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Finance Available

Fenster Glazing offer finance across our range of products. This allows customers to pay for their windows and doors over a flexible timeframe that suits them. To find a payment plan that suits you, use our online finance calculator. This will provide you with all the details you need to find the perfect plan for you.

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Finance Home Improvements

Our Process



The first step of your home improvement project with Fenster Glazing is a no-obligation consultation. We use WindowCAD 7, a state of the art window and door design software to virtually create your perfect double glazing installation. After our consultation, you can decide if you'd like make your 3D design a reality.



Before we start any work on your home, we’ll carry out a comprehensive survey of your property. This determines the scope of the work required for your new home improvements, and gives us a chance to tailor our installation to your specific vision.

Double Glazing Installation


It can be daunting letting tradespeople make changes to your home. But don’t worry; we'll be transparent and open throughout the entire process. Taking great care of your home, our installers will leave your space looking clean and tidy while we install our brand new home improvements.

Double Glazing Aftercare


Unlike with other double glazing companies, Fenster Glazing's service doesn't end at installation. We're strong believers in aftercare services, making sure your windows and doors continue to perform at the highest levels years after installation. If you ever have any problems, don’t hesitate to get in touch with our aftercare team for support.

Our Testimonials

There’s no better recommendation than those of our past customers. Take a look at what they have said about our home improvements products and installations.

We are very pleased with our new front door. Very good service and excellent quality. Would highly recommend Fenster Glazing.

Nicky Kent

From start to finish, Fenster have been amazing. Great communication, easy to work with, friendly fitters, flawless windows and a very fair price. I’m so happy I chose them over other companies and have already recommended to several of my friends and colleagues.

Dan Alger

Amazing service! Communication was easy from the beginning and both the professional who came to take measures and the one who finally replaced the windows were extremely friendly, quick, and helpful. I can't recommend enough!

Karen Gómez

I’d give 6 stars if I could! I’ve just had a new door fitted by these guys, absolutely amazing service and very fair price! I cannot fault a single thing! Thank you fenster!!

Laura B

I expected great service from Fenster Glazing based on the Trustpilot reviews and that is exactly what I received. Very satisfied customer, the whole process from measuring to fitting of my replacement door was made as easy as it could be for me! Well done to all in the Fenster team. You deserve your 5 star review.

Mark Vincent Smith

Excellent from End to End. Fenster originally came out to us and went through ideas, a couple of designs and all the options available to us. We settled and then changed our mind on a couple of things which was accommodated without question. Installation was superb - quick and efficient and the final product looks great!!

Mark S
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