London Box Sash Windows Logo

Trusted Fulham sash window company

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

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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.

    Rebecca Wood
    4 weeks ago
    We asked Simon to come and quote for replacing 6 tired windows – 3 casement and 3 sash windows. Simon arrived on time and was very polite. What impressed me most was his honesty and integrity. He asked how long we intended to stay in our home and he did a thorough review of the condition of our windows and then said, we would be better off just repairing them. In this day and age it's rare to find someone not trying to force sell things to you. Chapeau. Rest assured we will use this company in the future when we do need to replace our existing windows.
    Richard Bailey
    1 month ago
    This was the 3rd time using London Box Sash Windows to replace 1890s Victorian sash windows, having been very impressed with them previously. Both high quality windows and doors (manufactured locally!), and friendly and efficient staff. This time it was to replace a very worn out rear ground floor side return bay window. Jake was the first point of contact for assessing and quoting – on time and courteous.Then surveyor Harry who dealt straightforwardly with issues like precise measurements and the practicalities around the installation date. This was confirmed promptly on a standby basis (with the incentive of a small discount). It was reassuring to opt again for privacy glazing for this window (various designs available) and acoustic glazing. The installer Audrius arrived on time and carefully protected all areas in the room. The replacement took a day with additional filling and painting the following morning (including around the exterior bonnet roof). Along with skilled workmanship, the area was cleaned up afterwards. The window surrounds could then be easily painted by me after a couple of days. My interactions with Judith and Sam in the office were always very responsive – organising appointments, invoicing (exactly as agreed) and dealing with any snagging issues. Should a 4th requirement to use them arise, I'd be very happy to choose this company again.
    Jane Watkins
    2 months ago
    Great service, great quality product and polite professional staff. Very pleased with final result. Seamless from start to finish. Would highly recommend anyone looking to replace their sash windows to use this company.
    Aalia Khan
    2 months ago
    London Box Sash have done a fantastic job. I’ve now used their services around four times, and on each occasion I’ve compared options—yet they consistently stand out as the best by far, offering a great balance of competitive pricing, excellent service, and beautifully crafted products. Firstly, their windows are stunning, with a wide range of hardware options. I’ve had both sash and casement windows installed, all made from high-quality Accoya wood, which really shows in the finish. Secondly, the installation team are excellent. They take real care to make good around the windows—whether that’s repainting walls or fixing tiles—so nothing looks unfinished. They’re punctual, respectful of your home, and work efficiently and professionally, often completing installations within half a day. Thirdly, the entire process—from ordering to survey to installation—is smooth and well-managed. The team feels consistent and personal, with people like Judith handling bookings and payments, and Harry and Jake carrying out surveys. It has the feel of a trusted family business, with knowledgeable staff always on hand to offer helpful advice on the best options. Lastly, their aftercare is outstanding. Even with more complex installations (my Victorian walls weren’t the easiest!), they are quick to problem-solve and always willing to return promptly if needed. Overall, I wouldn’t hesitate to recommend London Box Sash.
    Christopher Wylde
    3 months ago
    Very happy with the whole experience here from start to finish. Professional and honest outfit that will do excellent work. Very happy to take on bespoke needs so if you have something slightly different to standard requirements these are the people to go for! UPDATE: used these guys again for my new house. Nothing has changed: still an excellent service. Nothing is too much trouble, great experience from start to finish. Great aftercare tips upon request. Nothing is too much trouble. You definitely get what you pay for with these guys.
    Tracy Clark
    3 months ago
    Simply outstanding! Everyone we dealt with was super friendly, polite and very efficient. The installation was seamless and they covered everything up with dust sheets and plastic. The windows are stunning and so easy to open. I highly recommend them.
    gervase
    3 months ago
    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
    3 months ago
    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.

    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
    Factories and showroom image

    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.