Exceptional sash windows Kingston-upon-Thames

A-rated box sash windows & casement windows fitted to residential and commercial properties in Kingston, Norbiton, or nearby areas

London Box Sash Windows is your trusted local specialist in sash window installation. We craft elegant, high-performance sash windows using Accoya wood and A-rated double glazing, offering exceptional energy efficiency and long-lasting durability.

Our designs preserve traditional sash windows’ slim, classic aesthetics, enhancing the architectural charm of properties in Kingston and surrounding areas. Our headquarters are just a few miles away, and we pride ourselves on delivering a personalised service. We collaborate closely with homeowners to ensure each installation perfectly suits their style and functional requirements.

As a Which? Trusted Trader since 2011 and with outstanding Google reviews, our sash window team is recognised for exceptional craftsmanship and customer care. Our strong reputation for quality reflects our unwavering commitment to excellence, making us the preferred choice for creating or restoring beautiful, efficient sash windows.

One recent customer explained:

Thrilled with our 3 new box sash windows. The quality of the windows is excellent and worth every penny. I thought the price was very fair compared to other quotes I received given the quality of the wood that is used, the length of the guarantees and the ease of the company to deal with. The process from start to end has been seamless. Everyone we interacted with was superbly knowledgeable, responsive and helpful – from Harry, the sales person who helped explain all the design considerations and options very clearly, Judith in the office helping getting us booked in and Andy, the fitter. Andy consulted us on any bits where needed explaining clearly the decision that was needed and his work was to an excellent standard and he was very clean and tidy and respectful of our home.

Contact our sliding sash window specialists at 020 8648 4230.

Hampton Wick: A-rated sliding sash window replacement

At London Box Sash Windows, our timber sash windows are more than just a traditional architectural feature – they are a timeless statement of elegance that elevates any home’s aesthetic. Combining classic design with modern functionality, our sash windows offer the perfect solution for homeowners who value luxury and energy efficiency.

Our dedication to craftsmanship and attention to detail ensures that every sash window meets the highest standards, blending tradition with modern comfort and durability.

To see examples of our recent sash window installation projects, explore our portfolio.

Double-glazed sash windows provide the beauty of traditional timber frames while significantly enhancing insulation and heat retention, ensuring a warm and comfortable indoor environment, especially in colder seasons.

One customer added:

Can only recommend! Everything went extremely smoothly. The team were always available to answer any questions and walk us through the entire process to get our new window installed. Also very competitively priced.I will be reaching out to them soon to get other slash windows replaced.

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Thinking about wooden sash windows in Kingston-upon-Thames, KT1

Kingston-upon-Thames, a historic market town on the River Thames, boasts a mix of architectural styles, from charming Victorian and Edwardian homes to sleek, modern developments. Many properties feature classic period details such as bay windows and intricate brickwork. Homeowners in Kingston often focus on preserving the traditional character of their properties while incorporating modern upgrades for comfort and efficiency.

Accoya wood offers many benefits, making it an ideal choice for sash windows. Its exceptional dimensional stability means it resists moisture-related issues. Accoya’s natural resistance to decay ensures durability, as it is impervious to insects, fungi, and rot. Environmentally conscious homeowners will appreciate its sustainable origins, as it is sourced from FSC-certified forests and requires less maintenance, reducing its ecological footprint.

This long-lasting material is a sound investment, backed by a 50-year guarantee for exterior use and 25 years for ground contact. Accoya also offers superior UV resistance, helping it maintain its aesthetic appeal even under prolonged exposure to sunlight. Additionally, its ability to hold paint or varnish for extended periods means your windows and doors will remain beautiful with minimal upkeep.

Please read our blog: What are the advantages of wooden window frames?

Our sliding sash window installation Kingston

Does your home feature timeless sash windows that are beginning to show their age? If they are becoming draughty, noisy, or no longer performing effectively, it may be time for an upgrade. Revitalise your property with replacement sash windows from London Box Sash Windows.

Our expertly crafted windows are designed to preserve the charm of your home while significantly enhancing its energy efficiency, reducing noise, and boosting overall comfort. Combining traditional aesthetics with modern functionality, our windows ensure your home retains its classic appeal while benefiting from improved performance and durability.

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

Philip Honer

Superb! From beginning to end. Communication is unusally good and the process seamless. Product is fantastic

R Edwards

The whole process felt simple, well organised, and stress-free, which was ideal during a loft conversion. London Box Sash found an install date extremely fast which meant we could make the building water-tight quicker than expected. We have used London Box Sash before, but I was still impressed by the quality of the windows, and the price for accoya wood as well. They’ve made a big difference in insulation and noise reduction. I would highly recommend London Box Sash Windows to anyone looking for a reliable service.

michael cronin

What stood out most was the care and attention to detail. From the moment we made our initial inquiry, the whole process was seamless and stress-free. Andy, in particular, was an absolute gem—his efficiency and friendliness made a real difference. The quality of the windows is superb, and we couldn’t be happier with the installation. We would wholeheartedly recommend London Box Sash Windows to anyone looking for new windows!

Michael Glynn

We followed our very successful window renewal with one more that needed doing. Naturally, we choose London Box Sash Windows again, and they fully lived up to our excellent previous experience. Just one man did the whole thing, on time, quietly, very thoroughly and with no mess left at all. In fact you would not know he had been, apart from a brilliant new window manufactured and fitted to the highest possible standards,

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

Richmond Upon Thames
Strawberry Hill
Teddington
Twickenham
Whitton

To get a quote for new or replacement sash windows throughout the London Borough of Kingston upon Thames, call now

For further details about our sash window installation or to request a free quote, please call 020 8648 4230 or email info@londonboxsash.com.

Kickstart your project for new sash windows Raynes Park.