Bespoke timber windows & doors across London.
Traditional proportions, modern performance and specialist installation for London homes. From one sash window to a full-property project, Box Sash designs, manufactures and installs bespoke timber joinery made around the building.
Established 1979. Bespoke timber windows and doors made in Britain and installed by specialists.
Made for the architecture of your home.
London properties demand more than an off-the-shelf window. Box Sash works with the proportions, mouldings, glazing patterns and character of the property, then combines them with modern comfort, security and glazing performance.
Box Sash’s registered business address remains in Hampshire; London is a service area, not a claimed physical branch. That keeps the location information accurate while making the coverage clear to customers and search engines.
Sash Windows
Traditional timber sash windows for Victorian, Georgian, Edwardian and other period homes.
Explore sash windows →Replacement Sashes
Replacement sashes designed around the character and proportions of the existing property.
Explore replacements →Casement Windows
Made-to-measure timber casements for period and contemporary London homes.
Explore casements →Restoration
Repair and renovation where retaining existing timber and historic detail is the right approach.
Explore restoration →Serving homes across London.
From North London terraces and conservation areas to West London townhouses, South London family homes and properties across East London, Box Sash can quote for projects throughout Greater London.
Real Box Sash work in London.
Existing London project pages give Google and homeowners genuine location evidence rather than a network of thin, repetitive location pages.
A Box Sash London project with a substantial gallery of completed work.
View Finchley project →A North London project showcasing bespoke timber windows in a period setting.
View Aberdeen Park project →