MADE IN BRITAIN
Manufactured in our own UK joinery
LONDON TIMBER WINDOW SPECIALISTS · MADE IN BRITAIN
Bespoke Timber Casement Windows in London
Made-to-measure hardwood, traditional proportions and modern double glazing. 50-year frames and 10-year glazing guarantees.
Bespoke British-made timber joinery for London period homes, backed by Box Sash experience since 1979.
100% authentic hardwoodStrictly no uPVC or plastic windows
Get in touch What happens next? One of our friendly team will call you to discuss your windows.
Read our many 5 star reviews from happy customersGET IN TOUCH
Get in touch about your windows.
We look forward to hearing from you
01
You tell us about your windows.
02
Our customer service team calls you back.
03
We discuss options and a home visit if appropriate.
FOR MORE INFORMATION OR TO ARRANGE A HOME VISIT FOR A QUOTATION PLEASE CONTACT US ON 01753 858196 or email us info@boxsash.com
A CALL FROM OUR FRIENDLY TEAM
Get in touch
Tell us a little about your project and one of our friendly team will call you back.
Thank you. We’ll call you soon.
One of our friendly team will call you back to discuss your project and, if appropriate, arrange a home visit for your quotation.
Call 01753 858196TRUSTED CREDENTIALS
Why London homeowners feel confident choosing Box Sash.
FENSA REGISTERED
Professional installation and compliance
FSC
Responsible timber sourcing
50-YEAR GUARANTEE
Timber-frame guarantee for long-term reassurance
See our timber casement windows.
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WHY BOX SASH
Proper timber joinery. Never uPVC.
Premium casement windows need to look right, feel right and justify the investment. Frame profiles, glazing bars, finish and proportion all deserve proper attention.
Established in 1979 · Made in Britain
Made-to-measure hardwood windows built in our own British joinery and fitted by specialists.
Designed for London homes
Experience with Victorian, Edwardian and Georgian properties, including the details important in conservation areas.
Worth getting right
No standard plastic units. We discuss frame profiles, glazing, opening styles and finish before specifying your windows.
WORKMANSHIP & FINISH
More of our actual casement-window projects.
Real photography from the actual Box Sash casement page, showing the homes, interiors and finish that help justify a premium choice.
See more of our window photographs
WHY WE VISIT
A proper survey makes the difference.
Photos and rough measurements only tell part of the story. Once you get in touch, one of our friendly team will call you back to discuss your project and the right next steps.
If a visit is appropriate, we can inspect the existing windows, discuss glazing and traditional details, and gather the information needed for a considered quotation — especially important for London conservation areas and period homes.
Get in touchBOX SASH · LONDON
Beautiful timber windows start with the right conversation.
Made in Britain. Established 1979. No uPVC. One of our friendly team will call you back.