Here at The Original Box Sash Windows Company we’ve helped protect and prolong the beauty of period homes and streets for more than 40 years 

Since our earliest days in London we have supplied top quality windows and doors to thousands of town and country properties that still look fabulous today.

Beautiful, solid and expertly fitted, what we make lasts and with our industry leading lifetime guarantees on timber frames and parts and 10 year guarantees on glazing, customers come back to us time and time again. Hardwood timber windows, French doors, bi-fold doors and front doors; we do it all.

As the company who invented the construction method for double glazed timber sash windows (patented in 1995 and now released), we are justifiably leaders in the marketplace. So when you choose us,  you can be sure you are choosing the best. Indeed, we are so confident of our craftsmanship, we encourage our customers to visit our factory and see their windows and doors being made (we will even buy you a lunch or dinner afterwards!). 

We operate across the southern half of the UK, predominantly in London, Surrey, Hertfordshire, Berkshire, Buckinghamshire, Hampshire, Sussex, Bedfordshire, Oxfordshire, Cambridgeshire, Essex, Gloucestershire, Wiltshire, Suffolk.