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Premium Putney sash windows

We install and replace A-rated box sash windows & casement windows in Putney, Barnes, or nearby areas

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Installing Sash Windows in Putney since 1980!

Welcome to London Box Sash, your trusted expert for sash window installation near you. We specialise in crafting beautiful, high-performance sash windows using Accoya wood and A-rated double glazing, ensuring enhanced energy efficiency and lasting durability.

Our designs maintain the slim, elegant features of traditional sash windows, seamlessly complementing the architectural heritage of Putney homes.

As a local sash window company, we take great pride in producing our windows just over two miles away, offering a truly personalised service to each client. This proximity allows us to work closely with homeowners, ensuring that every installation meets your unique style and functional needs.

Our sash window team consistently receives excellent ratings on Google reviews and has been a proud member of Which? Trusted Traders since 2011, earning top feedback for our craftsmanship and customer service. Our long-standing reputation for quality and reliability speaks to our dedication to delivering exceptional results for every project.

One recent customer said:

I have bought windows from London Box Sash twice now – the service is unmatched. Having had quotes from a series of other providers, LBSW kept coming out on top for me. The quality of the windows is extremely high, and they have made a massive difference to the feel of my home. The double glazing is excellent, and the installation was swift and professional. A huge thanks from a very happy repeat customer.

Get an instant quote for sash windows or call our team now on [telme].

Barnes sliding sash windows for your home

At London Box Sash, our timber sash windows are not just a traditional architectural feature; they are a hallmark of elegance that enhances the first impression of any home. These windows blend classic design with modern functionality, offering an ideal solution for homeowners seeking to maintain a luxurious aesthetic while improving energy efficiency.

By opting for double-glazed sash windows, you can enjoy the charm of traditional timber frames while benefiting from superior heat retention and insulation. This combination is crucial for maintaining a comfortable indoor environment, particularly during colder months.

Our expertise and passion for excellence guarantee that your sash windows will meet the highest standards, providing you with the perfect blend of tradition and modern comfort for years to come.

For images of recent sash window fittings, please see our portfolio.

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    Why choose our wooden sash windows in Putney, SW15?

    Putney is located along the banks of the River Thames in southwest London. It is known for its beautiful green spaces, such as Putney Heath and Wandsworth Park. The area boasts a mix of charming Victorian and Edwardian properties and modern developments.

    Many of these period homes feature original sash windows, which, while aesthetically pleasing, may require replacement due to age-related wear and tear, poor energy efficiency, or damage from the elements.

    Our sash windows are made from Accoya wood. Accoya is a treated softwood created through an acetylation process that enhances its natural properties. Unlike traditional timber, Accoya requires minimal maintenance to maintain its appearance. This process alters the wood’s cell structure, making it resistant to insects and fungi, preventing them from ingesting the material.

    Accoya offers outstanding thermal efficiency, showcasing excellent thermal retention and reflection properties. Combined with double glazing, Accoya windows help reduce energy bills while ensuring year-round comfort.

    The acetylation process also provides remarkable durability, resisting decay and harsh weather conditions. Its lifespan exceeds 60 years with little maintenance. Accoya has a lower carbon footprint than many alternatives and is sustainably sourced from fast-growing, FSC-certified pine in New Zealand. Its recyclability remains intact, as it can even be composted after use.

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

    Putney sliding sash window installation

    By blending timeless craftsmanship with modern technology, we can transform your home’s aesthetics while significantly improving its energy performance.

    Our skilled team specialises in crafting high-quality timber double-glazed sash windows and casement windows, ensuring that each installation preserves the unique beauty of your home. We are dedicated to delivering exceptional craftsmanship and take pride in producing windows that not only enhance the visual appeal of your property but also contribute to its energy efficiency.

    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:-

    • Acton
    • Barnes
    • Earls Court
    • Fulham
    • Roehampton
    • Wandsworth
    • West Brompton
    • Wimbledon
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    Do you need replacement sash windows or box sash windows in Putney? Contact our team now

    We can provide a consultation and free quote for sash windows or casement windows. Please call [telme] or email [emailme].

    Book a consultation for sash windows Streatham.