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About London Box Sash Windows

At London Box Sash Windows we don’t just sell windows, we partner with each and every one of our customers to provide them with a product that meets their needs and requirements. We are a family-run business driven by an immense passion cultivated from over thirty years’ experience. Throughout each generation we invest in research and development capabilities, manufacturing innovation and a skill-force that is at the very core of the industry. It is this longevity and strong heritage of producing the very best in timber windows and doors that makes us who we are.

Fully accredited and award-winning, more than 85% of our work is generated by word of mouth and existing customers.

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“I was extremely happy with the quality of windows from this company. The fitter that was sent, Andre, was professional, conscientious and attentive to detail. Upon leaving he made sure that the job was done properly and that I was happy with the finished product. He ensured that the flat was as clean and tidy as when he’d arrived. I would definitely recommend this company!!”
CLS London

“Great quality products at a competitive price and superior client service: Patrick and his team were super helpful in accommodating my needs and fit the overall installation within the timetable of a larger refurbishment process. Very neat and precise fitting with great attention to details. I’ll use them again.”
DD London

“We chanced across these guys towards the end of our search for new wooden sash double glazing and I’m so happy we did. From the moment they came around to quote they were a cut above the rest. No hard sell, no ‘buy now’ discounts just a knowledgable presentation of their product which they were extremely proud of, and rightly so. Price wise they were very competitive, even for their highest specification models which were far better than anything else we saw. Our only other concern was the fitting, we have a very old home, recently decorated, which had the potential of a lot of plaster to come loose. They however took the upmost of care to ensure as little disruption as possible, their attention to details was exceptional and the covering up of everything in the house made sure no dust or dirt was left behind, the fitters were true professionals and highly skilled in their trade. I couldn’t recommend them highly enough.”
PEckhamBren

“We are absolutely delighted with the new windows that were installed by Andy at the end of last week. They are a great match and the service they provided has been excellent. They have done a marvellous job and I have to say I have not seen anyone work as hard. they worked constantly, never on their phones, polite and really taking pride in the windows they fitted with excellent finishing.”
Veronica W

“The quality of their product is outstanding and they were the only company that came with a demo model when quoting so we could see the final product. The guys were a pleasure to have in the house and they had a fantastic work ethic. They arrived at 0730 and worked all the way through to 1830 every day for 4 days to get the 7 windows fitted. As I’m sure you can tell we are super happy and highly recommend London Box Sash to friends.”
Golfgtiman

“We’re delighted with our new windows and doors – and very pleased to be able to recommend London Box Sash. We went for LBS because we thought that they represented the best value all round; the difference in cost between partial restoration and full replacement was much less than we expected – and we/I were attracted by the reduced need to repaint! We had both sets of french doors, and box sashes replaced, and we’re really pleased with the end result. The new windows/doors match the existing style – but are much, much warmer. The installation and fitting was exceptional – we had the work done in December but the disruption and discomfort was kept to a minimum, and the quality of the finishing and detailing was outstanding. The care and attention to detail was second to none, and much, much better than any other tradesmen we’ve used. We hope to replace more of our windows in due course – and would have no hesitation in recommending LBS to friends and family. Great product and a great firm.”
Gavin Rand