Stunning sash windows installation Raynes Park and Motspur Park

London Box Sash design, make and fit A-rated box sash windows in Raynes Park, Motspur Park and surrounding areas

London Box Sash Windows is the trusted choice for sash window installation. We are a local, family-owned company specialising in handcrafted sash windows made from premium materials, including Accoya wood and A-rated double-glazed glass units.

Our windows seamlessly blend traditional sash window aesthetics with modern energy efficiency and durability, preserving the timeless charm of your home while improving performance.

Our skilled team of experienced tradespeople is dedicated to delivering superior craftsmanship and customer satisfaction. Our expertly designed sash windows, built to last and complement your property’s character, will enhance your home’s beauty and functionality. Do not just take our word for it—explore our glowing customer reviews to see why homeowners choose us.

One recent customer commented:

Can’t recommend enough. The windows installed seem like they’re a really high quality product. Very good customer service from end to end. They do a really thorough consultation & respond quickly to calls and emails. The day of the installation was easy and the guys who installed were quick and left no dust or mess. Followed up at the end via text, email and a call to check I was happy with the product – highly rate this approach.

By choosing London Box Sash Windows, you will benefit from exceptional materials designed to resist rot, decay, and warping. Our double-glazed sliding sash windows offer excellent insulation, helping to reduce energy costs and maintain a comfortable indoor environment. All our windows are manufactured locally in our London factory, just a few miles from our customers, ensuring strict quality control and personalised service.

Book a sash window consultation now by calling 020 8648 4230.

Motspur Park No. 1 sash window company to fit Accoya sash windows

Our sash and casement windows are perfect for modern and traditional homes, offering a timeless aesthetic paired with contemporary performance. The classic sash window design adds character to any property while using Accoya timber ensures exceptional durability and functionality.
Accoya is an enhanced softwood treated through an innovative acetylation process, strengthening the wood and making it highly resistant to insect damage and decay. Accoya sash windows can last over 80 years with minimal maintenance, providing long-term value for homeowners.

In addition to durability, Accoya windows are sustainably sourced and fully recyclable, making them an environmentally responsible choice. By selecting Accoya sash windows, you are investing in quality, longevity, and sustainability – ensuring your windows perform beautifully and support eco-friendly practices.

This seamless blend of style, strength, and environmental consciousness ensures our sash windows will elevate your home’s charm and efficiency for generations. Explore examples of our installations in our portfolio.

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Do you need sliding sash window installation in Raynes Park, SW20

Raynes Park in southwest London features a mix of Edwardian and Victorian homes, many of which showcase period architectural details such as bay windows, decorative brickwork, and traditional sash windows.

Modern developments and contemporary apartments complement the historic properties, offering a diverse range of housing options. We can supply and fit sliding sash windows to suit all properties.

If your home’s sash windows fail, replacements could be the perfect solution. Draughty windows can cause heat loss and rising energy bills, but new, well-sealed sash windows significantly improve insulation. Double-glazed replacements also provide excellent soundproofing, reducing street noise and disturbances from neighbouring properties.

Condensation and moisture buildup on your windows may indicate poor insulation, potentially leading to mould – issues that replacement sash windows can resolve. Additionally, if your windows stick, are difficult to open or close, or have damaged frames or hardware, new sash windows can restore functionality while enhancing your home’s aesthetics.

Check out our blog: Sash window vs other styles: What’s ideal for London homes?

The benefits of A-rated timber windows in Raynes Park

Our timber sash windows, designed with modern materials and techniques, deliver improved energy efficiency. Features like double glazing, weatherstripping, and insulated frames help minimise heat loss, enhance insulation, and lower energy bills.

These windows also provide excellent noise reduction, a vital benefit in a busy urban area. Paired with double glazing, our timber sash windows create a peaceful, quieter living environment while maintaining classic style and functionality.

Aalia Khan

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

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

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

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.

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

Merton
Morden
New Malden
Old Malden
Worcester Park

Would you like Raynes Park replacement sash windows? Call now

For a top-quality sliding sash windows or box sash windows quote, please call 020 8648 4230 or email info@londonboxsash.com.

Thinking about sash windows Richmond? Call us now.