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.

Additionally, we offer Commercial double glazing window and door solutions as well as new-age innovations like Curtain Walling systems, Louvre Vents and cutting-edge Automation. Get a bespoke quote for your commercial project today!

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.

Door Designer
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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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.

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Our office opening hours are:
9am to 5pm, Monday - Friday.
Closed Saturday - Sunday.

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Based on 67 reviews
Heather Scott
Heather Scott
This is the second set of windows we’ve had fitted by Fenster. They are brilliant at every stage and I would highly recommend them. The staff are friendly and professional, they got the job done quickly and well, we’re very pleased with both sets of windows they fitted and would definitely use them again.
Dan Alger
Dan Alger
I contacted Fenster last week to see if they could help me. My French doors were failing to lock meaning we couldn’t leave the house. They sent Ben out the next morning who replaced the mechanism and also adjusted the door, closing up an annoying gap that’s been there for years. I wouldn’t hesitate to recommend Fenster to friends and family, a really helpful and efficient company.
Alison Budd
Alison Budd
We couldn't be more delighted with the professional service we received from Fenster Glazing. Nick turned up on time for the initial visit/quote which was fair and reasonable. After accepting the quote a survey was was carried out. The installers arrived on time and were polite and friendly. They covered everything up and left everything clean and tidy. After installation Perry called to check we were happy with the service. The quality of the french doors and windows installed were outstanding. We have no problem recommending this company. We would rate Service, installation and aftercare as 5 star.
I live in Milton Keynes, I contacted Fenster Glazing for an uPVC replacement door. From the beginning to the end, they conducted professional communication, from sales to the technicians coming to replace the door everything was perfect. I had a draught issue with my door and it is resolved now. I want to mention that I am also happy with the quality of the material of the door. I am hoping to have the same quality of service in the future if anything comes up—special thanks to Perry for dealing with everything. Ben
CMH Yoga
CMH Yoga
Highly recommended. I wanted a very specific style of doors to fit into our 1930s front porch. Fenster designed them, advised on colour & finish and they have produced exactly what I was looking for. The fitters were very polite and made sure everything was to my standards, and no mess left.
Chris Pike
Chris Pike
Great company. Very friendly, helpful. The work was completed to a very high standard, at a very reasonable cost, and I would highly recommend them.
Martin Cassin
Martin Cassin
Used Fenster glazing to replace two large panes of glass in our conservatory. Everything so Easy from obtaining a quote from Fenster to agreeing installation date and completing installation, polite, professional installation staff, very happy with service from start to finish

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