Traditional Box Sash Windows
Authentic proportions. Modern performance.
Traditional Box Sash Windows, made to measure
Our traditional box sash windows are built to the same proportions found in Georgian, Victorian and Edwardian properties — slim sightlines, horns, and glazing bars set out by eye as well as by measurement.
Behind the period profile sits a modern window: weighted sash cords or spring balances, draught-sealed running sections, and a choice of slim double glazing or specialist conservation glass where planning requires it.
Traditional Box Sash Windows we've built
A selection of box sash windows completed for homes across London and surrounding areas.
Specification & features
Made to measure
Every sash is built to your opening, not adapted from a standard size — critical for period properties where openings are rarely square.
Conservation-grade glazing
Slimline double glazing and heritage glass options for listed buildings and conservation areas.
Authentic ironmongery
Traditional sash lifts, fasteners and horns, finished to match the period of your home.
Building Regulations
Specified to meet current Building Regulations, with how compliance is certified confirmed for each installation.
Box Sash Windows FAQs
Will box sash windows work in a conservation area?
Yes. We regularly supply like-for-like replacement sash windows for homes in conservation areas and listed buildings, matching the original glazing bar pattern, horns and putty-line detailing. Planning permission or listed building consent may be needed: please check with your local planning authority before ordering.
How long does a sash window last?
A well-made timber sash window, properly maintained, will outlast most modern alternatives — many original Victorian sashes are still in service today. Ours are built to the same standard.
Can you match an existing window style?
Yes, we survey the property and match glazing bar layout, horn detail and sightlines to your existing joinery or neighbouring properties where required.
Ready to talk about your box sash windows?
Chat with our TradeCraft Quotation Assistant and get your quote started in minutes. Free site surveys for quotation purposes.
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