Supply and installation
Double glazing in Northampton
Replacement windows, new doors or just the glass. We help you work out what your home needs, price the choices and fit the finished job with our own team.
Talk to us: 01908 429200Serving Northampton (NN1 to NN5) from our Milton Keynes showroom.
What needs replacing?
Start with what you want to change.
New windows
Choose how each room opens and ventilates first. Casement, flush and sliding sash windows offer different frame lines and opening styles; uPVC and aluminium give you different finishes.
View new windowsNew doors
A front entrance needs a different layout from a wide garden opening. Compare composite entrance doors, paired French doors, bifolds and sliding doors around the space you use.
View new doorsReplacement glass
If your frames are sound and the glass has misted between the panes, we can assess the sealed units on their own. Send a photograph of the whole window and a close-up of the glass.
View replacement glassNorthampton
Northampton homes, and what to check first.
The homes. Northampton has long streets of Victorian terraces from its boot and shoe trade, older villas and a Georgian centre, and large estates built from the 1970s when the town expanded as a new town.
What that means. The Victorian terraces often have bays and narrow frontages that suit traditional styles. The 1970s and 1980s estates are usually straight replacements of original or first-generation frames.
Check first. Northampton has several conservation areas, including the Boot and Shoe Quarter. Check the status of an older house before changing the style of its windows.
Windows and doors
Compare the styles before choosing a finish.
Your project in Northampton
See the samples. Talk through the job.
We cover Northampton from our base in Milton Keynes. A free consultation brings advice and colour swatches to your home. For full-size product samples, visit the showroom.
Book a free consultation98 Alston Drive, Bradwell Abbey, Milton Keynes, Buckinghamshire MK13 9HF
Opening times and directionsFrom our installation diary
Our work in and around Northampton.
The location, products and photographs from each job.
Roof lantern and heritage doors, Northampton
A Sheerline roof lantern paired with black steel-look heritage aluminium doors on a brick extension.
Read case study
Flush casements, tilt and turn windows and doors, Hanslope
Anthracite grey Liniar windows and two doors across a stone barn conversion in Hanslope, with flush casements on the elevations and a tilt and turn that opens two ways.
Read case studyYour questions
Buying double glazing in Northampton.
Product choices, pricing and what happens before we fit.
Can you replace the glass and keep my existing frames?
We can replace sealed glass units in suitable existing frames. Send us photographs and approximate sizes so we can check the frame condition and identify the glass. For handles, hinges or locks, our repairs team can advise separately.
How do I get a price for double glazing?
Build your price online using approximate sizes, or book a free consultation and we price the job with you. Both use the same software and price list. Once you decide to go ahead, a technical survey confirms the measurements and fitting details before anything is made.
Do you supply and fit in Northampton?
Yes. We cover Northampton and its NN1 to NN5 postcodes from our Milton Keynes base, and everyone who surveys and fits works for us. Nearby, we also fit double glazing in Wolverton, Newport Pagnell and Stony Stratford.
Do I need permission to replace windows and doors in Northampton?
Northampton is covered by West Northamptonshire Council. Like-for-like replacements are usually permitted development, but the town has several conservation areas and many listed buildings, where changes can need permission.
What our customers say.
Real reviews from real installations. Every one is public, so you can go and check them yourself.
Silvia Peraro
a month ago
I had an excellent experience with Fenster Glazing from start to finish. Nick Perry and David managed the initial quote to installation process seamlessly, keeping communication clear, honest, and completely stress-free. When it came to the actual fitting, Zac and Shane did a fantastic job with the installation, working efficiently and leaving everything spotless. The professionalism from the entire team was top-notch, and the final result looks brilliant. I highly recommend them.
Read on Google Nicole 20 May 2025Shane and James fitted two sash windows for us at the front of our house and we are so pleased.
Read on Google Josh McMillan 1 Jun 2025Tom and Radu were great with our install. Very happy with the work done.
Read on GoogleKeep comparing