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.

Will Edwards

Would 100% recommend. Great service. Very professional. Exceptional attention to detail. Really high quality. Lovely workers.

Felicity Ellacombe

If you’re thinking about new sash windows, I’d highly recommend these guys. From the moment I contacted them, the communication was smooth and professional. The installation went off without a hitch, and I couldn’t be happier with the quality of the windows. They are exactly what I hoped for – a functioning window that looks fantastic! I’ve already recommended them to my neighbours!

Dan Symons

If you’re thinking about new sash windows, I’d highly recommend these guys. From the start, their reputation and quick installation times stood out to me, and they did not disappoint. Jake made a great impression during our initial meeting, and the installation itself was brilliant. I had a minor hiccup with the first installer not knocking, but the second one was excellent. The windows look fantastic, and I’m really pleased with the quality. Overall, a solid experience and I would definitely recommend them to friends and neighbours.

Dieter Gatzke

Had a couple of beautiful new sash windows installed in summer of 2024 by London Box Sash Windows Ltd. At the time we were (and still are delighted with their work.
When we needed a new made to measure balcony door in June 2025, for obvious reasons London Box Sash Windows Ltd was our first port of call. We gathered a couple of quotes from specialised door installation companies but found that the price difference was marginal compared with what London Box Sash Windows Ltd quoted us.
So we went with ‘the devil we knew’
The experience from start to finish was s great as before. From the first visit by Jake to the post installation follow-up call by Judith everything worked extremely well again.
The door looks and feels solid and is made to look like the original door (first installed in 1905), including double glazing in 3 different colours across the 9 glass segments.
If you after a cheap job, don’t use London Box Sash Windows Ltd – they are not cheap. But for your money you get an outstanding product, expertly installed and with full warranty.
Without hesitation, I will recommend London Box Sash Windows Ltd to friends and neighbours.

Steven Munro

The new windows have completely transformed the feel of the house — quieter, warmer, and just better. We chose London Box Sash Windows after being impressed with the quality and price during the initial quote. The installation experience was smooth, and I can’t recall any issues, so I’d rate it a solid 10. Jake, who came to survey our home, was particularly knowledgeable and left a great impression. Overall, I would definitely recommend.

Jane Sparrow

This is the second time I have purchased windows from London Box Sash and both times the experience has been excellent. From the initial appointment, to timing of the quote, survey, communication from the office and finally the installation, everything was handled efficiently and professionally by all the people I interacted with. The installer completed the job a day ahead of schedule and left everything tidy. The quality of the windows is outstanding, and I would happily recommend them to friends and neighbours.

Charlotte Gillespie

Really impressed with how professional and tidy the team was. Raf and Angelo did an outstanding job during the installation; they were incredibly polite and efficient, making the whole process smooth and hassle-free. I would definitely recommend London Box Sash Windows to anyone looking for reliable and high-quality window installations!

Many thanks,

Jack
London Box Sash Windows