Who Are We?

Windows and Doors Milton Keynes & Northampton

Fenster Glazing deliver high quality uPVC and aluminium windows and doors to homes across Milton Keynes and further afield. Our expert installation service will provide you with home improvements that are designed to be the perfect mix of style and substance. We’ll leave you with a perfectly fitting installation that provides an excellent performance for years to come.

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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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Double Glazed Windows Milton Keynes

FENSA Accredited Home Improvements Milton Keynes

You don’t have to take our word for the quality of our home improvements products and installations. We have a wealth of testimonials from past customers whose homes we have transformed with our windows and doors. Also, we have full accreditation from top UK authority FENSA, ensuring the thermal performance is top notch and that your windows are Building Regulation compliant.

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Double Glazing Window Suppliers Milton Keynes

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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Home Improvement Milton Keynes

The SureFlap Cat Flap

We don't just specialize in windows and doors; we also offer state-of-the-art SureFlap cat flaps, the perfect solution to keep your cat safe while giving them the freedom they need. This innovative system allows your pets to move freely between the inside and outside of your home. Equipped with a microchip in the collar, the flap only opens for your feline friend, enhancing your home's security by preventing potential intruders. For a hassle-free way to provide your cat with freedom, choose SureFlap.

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Our Process

Home Improvements Costs Milton Keynes


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. This also allows us to provide a completely accurate pricing quotation for the work, tailored to your specific vision.

Home Improvements Quotes Milton Keynes


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.

Home Improvements Prices Northampton


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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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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