Trusted Fulham sash window company

Would you like replacement or new box sash windows in Fulham, West Brompton, or nearby areas?

London Box Sash Windows specialises in designing, crafting, and installing traditional timber sash windows that are proudly manufactured in our nearby factory. With over 40 years of experience, we have built a strong reputation for delivering bespoke, high-quality products that stand out in the industry.

We take a customer-focused approach to every project, starting with a detailed consultation to understand your plans. Our friendly and experienced team guides you through the process, from the initial consultation to installation. Our team meticulously crafts all our products using cutting-edge technology and expert craftsmanship. We offer a wide selection of box sash and casement windows, ensuring a perfect fit for your home.

Quality and sustainability are at the heart of London Box Sash Windows. Our high-performance windows are designed to reduce CO2 output, helping homeowners embrace sustainable living without compromising style or functionality.

We are also proud of our exceptional reputation.

One customer said:

Jake provided a great consultation and really listened to my requirements. He was confident, yet gentle with his approach and so knowledgable. I received multiple quotes from providers which honestly felt like a waste of time, as they didn’t seem to listen to my needs of wanting timber only. London Box Sash Windows stood out among them all, especially for their expertise and care in period properties. Really competitive pricing as well! Cannot wait to use and would highly recommend!

For further details about our company or services, please call 020 8648 4230.

West Brompton Accoya sash window company

Our Accoya sash windows represent the pinnacle of custom craftsmanship, blending elegant design with exceptional durability. These windows enhance a property’s aesthetic appeal and offer smooth operation and impressive thermal efficiency, making them a valuable addition to any home.

Accoya wood is a top choice for sash windows due to its unique properties and eco-friendly production. The wood undergoes an advanced acetylation process, altering its structure at the molecular level to ensure unparalleled stability and durability. Accoya sash windows withstand London’s variable climate for decades without cracking, swelling, or shrinking. Its sustainable origins and non-toxic production methods make Accoya an environmentally responsible choice, combining strength and beauty with ecological goodwill.

While oak is admired for its classic beauty and durability, Accoya surpasses it in several ways. Thanks to its innovative treatment, Accoya resists rot, decay, and insect damage more effectively. It also offers superior dimensional stability, reducing swelling and contraction over time. Additionally, Accoya’s sustainability credentials, including the use of ethically sourced materials and non-toxic methods, make it a cutting-edge option for eco-conscious homeowners.

One customer explained:

Absolutely brilliant windows. We looked around the competitors but London Box Sash made windows that looked closest to our originals. Key thing to note in my photos is that the weather seals are white and not black like most competitors. Their customer service and quality professionalism was top notch. Thank you.

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Why choose our sash windows specialists in Fulham, SW10?

In southwest London, Fulham has a mix of period homes and modern developments. Many of the houses boast charming facades, spacious interiors, and access to beautiful green spaces like Bishop’s Park. We believe windows and doors are key features of any home, combining energy efficiency with harmony in architectural style.

We aim to enhance the look, comfort, and value of your property with solutions that blend functionality and design. Whether you need a single window or replace multiple for a larger project, we are committed to delivering tailor-made solutions that meet your requirements.

London Box Sash Windows was founded by John Ellis in 1980. We are still a local and independent window company that prides itself on offering an exceptional service. Customer service is our top priority, and we greatly value the recommendations from our customers, which contribute significantly to our new business.

We take pride in offering our clients a wealth of knowledge and expertise in the timber window and door industry. We are also committed to delivering high-quality products and exceptional service.

See our portfolio for pictures of recent sash window installation projects.

Fulham A+ rated sliding sash window installation

Choosing London Box Sash Windows for your installation ensures you receive top-quality materials that resist rot, decay, and warping. Our double-glazed sliding sash windows offer outstanding insulation, helping to reduce energy bills significantly. All our sash windows are crafted in our London factory, just a few miles away, allowing us to maintain full control over quality.

Installing new sash windows is a great way to improve your home’s energy efficiency while preserving its character. According to the Energy Saving Trust, upgrading from single-glazed to A-rated double-glazed windows in a standard semi-detached home can save around £195 a year on energy costs.

Our team of skilled tradespeople is dedicated to providing excellent service and craftsmanship. By selecting London Box Sash Windows, you will enhance the beauty and efficiency of your home with expertly crafted sash windows designed to withstand the test of time while complementing the unique style of your property.

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

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.

Carole Plessy

Very professional, stress free. Beautiful finished sash windows, very smooth mechanism. Strongly recommended

Virginia Carter Leno

We are so pleased with our new windows! London Box Sash did a great job installing new timber sash to replace our very sad and poorly fitted uPVC windows. They were incredibly professional from start to finish, I had many opportunities to ask questions about materials and specification, and I was confident everything would be manufactured and installed by their own team (rather than outsourced to some unknown company/installer). The new windows look fantastic – would 100% recommend! Thank you Jake, Judith, Harry and the installation team.

Rob Davies

They were professional, friendly and efficient at every stage of the process. The installation went really well and we’re very pleased with the result. Warmer rooms and an unexpected improvement in sound insulation, deadening traffic noise. Good experience all round, would recommend.

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

Acton
And Fulham
Barnes
Battersea
Chelsea
Earls Court
Fulham
Hammersmith
Kensington
North Kensington
Putney
Roehampton
Shepherds Bush
South Kensington
Wandsworth
West Brompton
West Kensington

Would you like a sash window or casement window quote in Fulham?

To learn more about our sash windows or how they could improve your property, please call 020 8648 4230 or email info@londonboxsash.com.

Find out more about sash windows Lewisham.