Endorsed by Which?

London Box Sash Windows Ltd

5.0

104 Reviews

Opening Hours
Today - 07:30–17:00
  • Monday 07:30–17:00
  • Tuesday 07:30–17:00
  • Wednesday 07:30–17:00
  • Thursday 07:30–17:00
  • Friday 07:30–17:00
  • Saturday - Closed
  • Sunday - Closed

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About

London Box Sash Windows is a family-owned and operated business that has been providing London homeowners with high-quality, custom-made timber sash windows for over 40 years. We use only the finest timber and double-glaze our windows to provide excellent insulation and energy efficiency. Our windows are also built to the highest standards and are backed by a comprehensive warranty.

We offer a wide range of timber sash window styles to choose from, including horns to match existing designs, traditional looking double-glazed units, casement windows and french doors

If you are looking for high-quality, custom-made timber box sash windows, then London Box Sash Windows is the perfect choice for you. Contact us today to schedule a free consultation and estimate.

FENSA Registered Company

0208 648 4230

What we do

  • Glaziers

    • Window consultants
    • Sash windows
    • Replacement window services and repairs
    • Timber windows
  • Double glazing

    • Double glazing installation
  • Carpenters

    • Joinery and carpentry
  • More Services

    • double-glazed timber sash windows

Customer reviews

Why you can trust these reviews

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5.0
104 reviews
Customer Service
5.0
Quality
5.0
Value
4.9
Sort by
I honestly couldn't be happier.
Customer Service
Quality
Value
As the guys were working on our bay windows downstairs I sat in my bedroom on a work call. I could not stop staring at our new replacement window which had been installed the previous day, and I mailed Judith to tell her that. It's such a difference, even setting aside any notion of resale value. The benefit to the look of the property inside and out is immediate. Other benefits like energy efficiency, noise reduction, and lack of condensation seem like icing on the cake. It's as though I feel more at home just standing in a room and looking out. The guys are very considerate and do a great job keeping the mess under control. The service is not cheap, but it's very good value. I feel good having spent the money. I intend to engage them again for plantation shutters, which I'm told they can do on their installed windows without needing to measure up.
Customer in Surrey Posted on 24/02/2021 , work completed 23/02/2021
Great company, high quality windows and friendly team
Customer Service
Quality
Value
We had used London Box Sash Windows a few years ago and were very happy with the job so we called them again to change the windows of our new flat as they were very old and single glazed. The quality of the new double glazed windows London Box Sash Windows made and fitted for us is excellent. The team were very nice and professional. They used protective sheets and left our flat spotless, despite the job creating a lot of dust. The day after the windows were fitted we noticed some minor fixing that was needed. The Company came back after a few days and fixed the job with no fuss, which we much appreciated. Something worth mentioning as well is they strictly comply with the covid rules, they all wore masks at all times when walking in the flat and we felt safe having them around to replace our windows despite the pandemic. We would definitely recommend London Box Sash Windows to friends & family.
Sandra in Greater London Posted on 17/02/2021 , work completed 01/02/2021
Excellent quality and brilliant service.
Customer Service
Quality
Value
I had the front windows replaced to my property. I’d previously used London Box Sash to replace the rear windows 6 years before, which I’d been very pleased with. Excellent service throughout the whole process from quoting through surveying and fitting. Everyone I encountered was very helpful and easily able to answer any questions and kept a professional yet friendly service. They played great attention to detail to ensure a match with the existing windows. Fitting was carried out efficiently, kept pristine cleanliness and tidiness throughout providing full protection of my belongings in the process. Kept me informed of details as the work to fit was carried out, no surprises along the way. The finished windows give an excellent level of noise reduction and immediately noticed the difference to temperature from the old windows. They are incredibly smart, fitting in very well with the Victorian property and period features.
Customer in Greater London Posted on 03/02/2021 , work completed 29/01/2021
Beautiful sash windows and excellent team
Customer Service
Quality
Value
We had an excellent experience with London Box Sash Windows - installing double glazed windows in our terraced home. From the start, the team were friendly and helpful - they obviously knew their stuff and took the time to chat through all the potential options and finer details. When it came to doing the actual work, the team were super - they were polite, very respectful in terms of being in our home (particularly during COVID-19 times) and helpful in terms of prepping rooms for work. The quality of the work they did was superb - the windows look lovely (and they work!), and the additional effort to get the small details right was so appreciated. We were so pleased! Would certainly recommend LBS for anyone that was exploring getting similar work done.
Customer in Greater London Posted on 27/01/2021 , work completed 14/01/2021
Great job
Customer Service
Quality
Value
Andy came on time it was a 3 day job his work was exceptional he asked me when he had to fit the windows to make sure I would be happy with the the look as like all old property windows not the same size.Right from the first talk with the company I was so impressed with whole way my order was completed .Andy made sure plastic covered my furniture and each night cleaned away. I took pictures of the windows sent them to all my family as the could not visit because I am so impressed with them.
Customer in Greater London Posted on 25/01/2021 , work completed 24/12/2020
Very happy
Customer Service
Quality
Value
They changed all the window in my house and I couldn’t be happier. Their quote was competitive and the quality and finish of the work was great. I have a mixture of sash and casement windows and they all match perfectly. The fitters were very tidy, took a lot of care minimising damage and worked around a couple any issues they came up against. Highly recommend.
Customer in Greater London Posted on 04/12/2020 , work completed 30/11/2020
Smooth and high quality from start to finish
Customer Service
Quality
Value
London Box Sash Windows replaced two old and rotting sash windows at the top of my property. From the first home visit they were polite, friendly, professional and clear about pricing and timings. I had a full list of contacts and regular communication from the office. Andy was the installer and did a brilliant job over two long days to replace the windows, including removing and replacing the existing shutters and working with wonky Victorian walls! He covered and protected the rest of the room and the house, and cleaned up thoroughly before he left. First rate team from start to finish - would highly recommend.
Customer in Greater London Posted on 28/10/2020 , work completed 22/10/2020
Fantastic service and beautiful windows
Customer Service
Quality
Value
We asked London Box Sash Windows to replace all the windows in our Victorian terrace house in London. Jack, Patrick and the team were incredibly knowledgeable and spent time talking us through our options, explaining the history of the business as well as the specifications for the windows. The windows themselves are beautifully crafted and finished, operate very smoothly and feel incredibly secure. They have been complimented by many people. The glass used in the bathroom window is particularly special and in-keeping with the age of the property. Installation was efficient and took place well within the original schedule we had anticipated. We had recently replastered and no damage was caused to the new plasterwork. We had regular email and phone communication with the team throughout the process who were on hand to answer all our questions. We are delighted with the windows and with the service provided. We were pleased to be able to support a local family business. They come highly recommended.
Customer in Greater London Posted on 27/05/2020 , work completed 21/05/2020
Great quality windows, really nice people.
Customer Service
Quality
Value
I couldn't be happier with my new sash windows and French doors. The quality of the design, workmanship and materials is excellent, the communication and general service are also just as good. It's always nice to use a family company too - Jack and Patrick run a professional and friendly outfit. They took considerable time to help me design really stunning French doors and were really flexible when it came to installation requirements. I'm kicking myself that I didn't find this company earlier - I used an alternative sash window specialist company to fit some windows just after moving, the quality is just not nearly as good despite them being more expensive.
Customer in Surrey Posted on 08/01/2020 , work completed 19/12/2019
Exceptional from start to finish!
Customer Service
Quality
Value
We have just had seven windows replaced, including a bay window, in our (1906 built) house by London Box Sash Windows Ltd .We are absolutely thrilled with the finished work. Simply cannot fault a single aspect! The quality and finish is stunning and has greatly improved the curb appeal and heat efficiency etc of our property. However, what has been most impressive is the professionalism of everyone we dealt with. Jack and Patrick have clearly picked up the mantle from their Father and continue to deliver a top quality product and exceptional service for every customer. The administrative side was straightforward and excellently handled by Judith. Angelo and Raf are the most outstanding workmen we have ever had in our house! Angelo walked in with a small tool box on the first day, proceeded to cover every surface and carpet with protective sheets. Then brought in a whole workshop of tools and equipment and then worked very hard and non-stop with an attitude of pride and concern for his work. On the last day, he walked out with the same small toolbox and no-one would ever be able to tell that they had been here! - apart from the wonderful windows they installed! It was a total pleasure to meet them both and a joy to have them working in our house. We have no hesitation in recommending London Box Sash Windows Ltd.
Customer in Greater London Posted on 15/11/2019 , work completed 07/11/2019