“We were dubious so tried one window first and couldn’t believe the results. We have now had the whole house done and are still very much in love with our windows.”
Read Georgina's review ↗
THE ORIGINAL BOX SASH WINDOWS COMPANY · EST. 1979
Beautiful windows.
Beautiful homes.
Bespoke timber sash windows and doors, made in Britain by Box Sash since 1979. Traditional character, made-to-measure for the home you love.
Leave your details. One of our friendly team will give you a call.
★★★★★Read our many five-star customer reviews
Crafted here. Since 1979.BOX SASH · BRITISH JOINERYBuilt around the home, never the other way round.
Since 1979Specialist timber window & door makers
FENSA registered
Responsible timber sourcing50YEARTimber-frame guarantee*
*Guarantees are subject to product eligibility and the applicable terms.
The Box Sash difference
For homes with character. And people who care about the details.
Your home has its own character. The right windows should look as though they've always belonged there.
That's why we start by listening and looking at what you already have. We'll talk through what can stay, what might need replacing, and the details that will make the finished job feel right. Our timber joinery is made in Britain, to fit your home.
Meet Box SashOur windows
The right windows make a house feel like home.
Authentic timber, made to fit your home. These photographs show examples of finishes and designs — your windows are made around what you want.
01 · THE CLASSIC
Timber sash windows
Traditional character, with modern glazing and comfort.
Find out more
02 · KEEP THE CHARACTER
Replacement sashes
Where the original box frames are sound, we may be able to keep them.
Find out more
03 · MADE TO MEASURE
Timber casement windows
Beautifully proportioned windows for traditional and contemporary spaces.
Find out more
Made in Britain since 1979Made by Box Sash in our UK joinerySee how we work
Made by us. For your home. In Britain.
Our timber joinery is manufactured in Britain by Box Sash, to the measurements and details of your property. That means a proper choice of glazing, mouldings, paint colours and ironmongery — not just a selection of standard sizes.
It's also why we can talk honestly about the options for your existing windows before you make a decision.
Made by Box Sash in our UK joineryIn our customers' words
Our reviews are a testament to the service we provide.
★★★★★Real five-star customer experiences
“From the very first visit, the team were friendly, professional, and genuinely cared about getting everything just right for my home.”
Read Lucy's review ↗“We opted to keep our existing box frames and install new hardwood timber framed double glazed sashes. Wow! What a difference , so warm and snug now !”
Read Robin's review ↗These are individual five-star customer reviews, not a claim about Box Sash's overall review rating.
Our doors
A beautiful first impression. Every time.
An entrance you’ll love coming home to. French and bifold doors that bring the garden closer. Proper timber joinery, made for your home.
Why a home visit matters
We come to see your windows. Not just measure them.
Photos and measurements are a helpful start. But there's no substitute for seeing the original frames, the details of the building and what is actually causing the problem.
That way, we can explain whether keeping the existing frames is sensible, what glazing could help, and how new joinery would look alongside the rest of the property. You'll know what is being recommended and why.
Get in touch Our team will contact you to discuss your project and the next step.
Getting started
Tell us a little about your project. We'll take it from there.
01
Tell us what you're thinking
One window or the whole house, sash windows or doors — let us know roughly what you have in mind.
02
We'll give you a call
One of our friendly customer service team will get in touch to find out a little more and answer your questions.
03
We'll advise on the next step
Where a home visit is appropriate, we'll talk through the options and how a proper quotation can be prepared.
Box Sash · Made in Britain since 1979
Let’s make something beautiful for your home.
Whether you know exactly what you want or you're not sure where to start, we'd be pleased to hear from you.
Tell us a little about the project and a member of our team will call you back.