Stunning new sash windows Wimbledon

Timber sash windows and replacement sash windows manufactured locally and installed in Wimbledon, Southfields, or nearby areas

Installing Sash Windows In Wimbledon since 1980!

Welcome to London Box Sash Windows. We are a family-run sash window company specialising in high-quality timber sash windows. Our workshop manufactures a complete range of wooden sash windows, preserving timeless elegance and style.

We have been handcrafting custom-made double-glazed sash windows for over four decades to meet our customers’ needs. Our skilled engineers use only the finest materials, ensuring our wooden sash windows are built to the highest standards. We are committed to providing exceptional products and service, earning a reputation for quality and craftsmanship.

Our sash windows team has excellent ratings on Google reviews and top reviews on Which? Trusted Traders.

One recent customer said:

Outstanding customer service and quality in every aspect and interaction. We ended up replacing all the windows that we could we these guys on the strength of the experience we had with them. Would highly recommend getting a quote from them if you are in the market for windows.

At London Box Sash Windows, we prioritise eco-friendly manufacturing that benefits customers and the economy. We produce all our products at our London factory, just down the road from Wimbledon. Remarkably, 90 per cent of our window installations occur within eight miles of their production site. This approach supports the local community and minimises our environmental footprint.

Visit our local showroom to explore our stunning range of sash windows and experience our craftsmanship firsthand. Our knowledgeable team is available to offer expert advice and help you select the perfect sash windows to match your style and needs.

To request an instant estimate or more information, please call [telme].

Why choose our Southfields sash window company for sash window installation?

Wimbledon, renowned for its prestigious tennis tournament, is known for its charming blend of historic and modern properties. Many homes in Wimbledon and Southfields feature traditional architectural styles, making them ideal for replacement sash windows.

Installing new sash windows in these properties enhances their aesthetic appeal and boosts energy efficiency and soundproofing. Modern sash windows, with advanced features like double glazing and draught-proofing, preserve the character of these historic homes while offering contemporary comfort and functionality.

Since engineer John Ellis opened our first workshop in 1980, we have specialised in double-glazed sash windows and doors, meticulously crafted to stand the test of time. Over the years, we have expanded our business, continually investing in state-of-the-art machinery to ensure our products are of the highest quality.

Our commitment to excellence is backed by a highly skilled team of craftsmen dedicated to maintaining the highest quality standards. At LBS, we take pride in delivering products that combine timeless design with enduring durability.

Please see our portfolio.

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Why choose Accoya sash windows in Wimbledon, SW19?

Accoya wood is renowned for its exceptional durability and stability, making it an ideal choice for sash windows. It is resistant to rot, decay, and insect damage, ensuring longevity. Accoya is a sustainable option with a low environmental impact, crafted from non-toxic, responsibly sourced materials. Its impressive lifespan further enhances its appeal, making Accoya wood an excellent choice for windows and doors.

With its combination of strength, sustainability, and aesthetic appeal, our sash windows are designed to stand the test of time while minimising their environmental footprint.

We are dedicated to delivering the best service to our customers. We provide a free consultation and estimate for new sliding sash windows and are always available to answer your questions. Additionally, we offer a satisfaction guarantee on all our products and services.

Another customer added:

An excellent all-round experience; the windows look fantastic, and the much-feared compulsory trickle vent is particularly discreet! If we ever need more doing, we know where to come.

A+ rated sash window installation

It is essential to prioritise energy efficiency in your home. Installing thermally efficient windows enhances your quality of life and contributes to environmental protection by lowering carbon emissions. No matter which style you select, the benefits will immediately be evident. You will experience a warmer, more comfortable living space and enjoy savings on your heating bills.

Timber sash windows are an exceptional choice for several other reasons. First, it has a significantly longer lifespan compared to alternative materials. While uPVC typically lasts 15 to 25 years and aluminium up to 30 years, timber can outlast these options by as much as 30 years when properly maintained.

Although the initial cost of timber windows and doors may be higher than that of other materials, their longevity – around 60 years – results in lower overall costs throughout their lifetime. Additionally, timber is the only mainstream construction material that is nearly infinitely renewable and regenerative.

Our windows are designed to open and close smoothly. They usually feature counterbalanced mechanisms or spring systems, enabling easy opening and closing without requiring excessive force or maintenance.

gervase

We recently had our sash windows installed by London Box Sash Windows, and the whole experience was excellent.

Anjelo and Raf, the installation team were respectful, professional, and did a wonderful job. Jake who looked after us on the sales side, was helpful and knowledgeable, Judith kept it all organised.

The sash windows themselves look absolutely beautiful and have completely transformed the appearance of the house. We’ve had a number of compliments from people passing by, which speaks for itself.

Brad V

You do not need to worry because this company make, supply and fit the best windows around.
I have used them well over 10 years on various projects and i would not go elsewhere. What can i say other than ‘superb in every respect’
Their choice of wood and paint is astonishing as they never move or crack and look like they were fitted only yesterday even though my original windows from them are well over 10 years old, i have never had to do anything to them.
I cannot express how brilliant their products are and, their service is fantastic. I would never use any other supplier.

Phil Bowen

We have used London Box Sash Windows twice in the past four years. We can’t speak highly enough of the customer service, the ease of the sales process, the quality of the work and the professionalism of the window fitter. We now have a beautiful set of windows in our house and would not hesitate to recommend them.

Helen Jenkins

I found London Box through Which Trusted Traders and was so glad that we chose them to replace a bathroom window in 2025 following it being damaged through an attempted break-in. We were so impressed with the service given by the company through the assessment visit by Simon, the contact and support through the office of the lovely Judith and the amazing work done in a single day by the wonderful Andy to replace the window. He worked tirelessly all day and cleaned and tidied up beautifully afterwards. Because of their impressive service installing this window we employed them to replace the bay windows on our house which was a much bigger and more complicated job because of issues to do with the state of the bay itself but London Box were more than up to it. This time Harry came to measure up and Judith in the office continued to keep us informed and up to date with the process. Angelo and Raf did a fantastic job on the day installing the new windows. It was a very difficult job but they did amazingly well and we couldn’t be happier with the windows as well as with every aspect of our involvement with the company. Would throughly recommend this company and not hesitate to use them again in future.

Andrea Melville

I have used London box sash windows three times. The product stands the test of time. We had upstairs bedroom windows installed in 2014. Lounge in 2021 and bathrooms 2026. They open as easily today as when installed. Service is professional. Everything left clean. When some water got in some glass it was replaced quickly with no fuss. A great experience and a great product.

You

Excellent result from these guys- they are extremely efficient, turned up on time, did a great job with an old rotten window, cleaned up afterwards and were polite and friendly

Pete Stoneman

After getting quotes from three sash window companies, we chose London Box Sash to replace six old, single glazed sash windows. Every step of the process was great and the new windows have massively improved the look of the house from the street – as well as making it better insulated for noise and warmth.

At the initial home visit Jake clearly explained the different options available to us and their respective costs. I didn’t feel rushed or pressured with an upsell. Harry took measurements at the pre-manufacture survey, confirmed our chosen options and explained the installation process.

We were also invited to visit the factory, and it was great to see the windows being made locally.

Andy, the window installer, was absolutely fantastic. He arrived on time every day, was a hard worker, and showed real attention to detail. He also took the time to explain what he was doing at each stage of the install.

I would not hesitate to recommend London Box Sash to others and will reach out to them when we need other windows replacing.

Dominic Elliott

I had all of our front windows replaced with London Boxsash wooden sash windows and couldn’t be more delighted.

The window demonstration was really informative and I could tell from the start that the windows were far superior to any others I’d seen.

The booking process was very smooth and the installation team were by far the most professional, fast and tidy I’ve ever witnessed.

This isn’t a cheap product but represents superb value for money.

Book a sash window survey in any of the nearby locations:-

Wandsworth
Malden
Balham
Mitcham
Putney
Raynes Park

To get a quote for new sliding sash windows or replacement sash windows in Wimbledon, call now

Would you like replacement sash windows? Please call [telme] or email [emailme].