Endorsed by Which?

London Box Sash Windows Ltd

5.0

110 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

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

5.0
110 reviews
Customer Service
5.0
Quality
5.0
Value
4.9
Sort by
Lovely windows/door, fantastic service
Customer Service
Quality
Value
I would highly recommend London Box Sash windows. From the initial detailed consultation with Jack, the comprehensive survey with Patrick, speaking to Judith in the office, to Mark and Angelo who made the installation straight forward and easy, this is a family company who obviously take pride in their product and the high quality service they provide. The four upstairs windows, French door and large ground floor bay window they installed not only look fantastic but have already made such a difference to the warmth in our house. Although a few issues did arise with the French doors, these were dealt with quickly, professionally and to our complete satisfaction. Both Mark and Angelo were extremely considerate around our newly decorated property which we much appreciated. I would have no hesitation in recommending London Box Sash and intend to use them again in the future to complete the rest of my windows. Thank you so much Jack, Patrick and all the team at London Box Sash.
Deline Posted on 04/09/2017 , work completed 04/09/2017
High quality windows and excellent service and support
Customer Service
Quality
Value
Really impressed. From the initial quote to the final installation London Box Sash were flawless. We had a large bay window in our London flat and are delighted with the final product. Has hugely improved the sound and heat insulation, not to mention looks amazing. We had quotes from a number of competitors and are delighted we went with London Box Sash. Would 100% recommend.
Tom Knott Posted on 12/08/2017 , work completed 12/08/2017
The entire process was simple
Customer Service
Quality
Value
The entire process was simple. The whole team were very professional, good communicators and totally reliable. The end product is fantastic. My neighbours commented on how good the fitters were and are now very envious of my beautiful window. Great family company. Highly recommend them.
Cathy Posted on 23/05/2017 , work completed 23/05/2017
Brilliant
Customer Service
Quality
Value
We’ve just had all our Victorian sash windows replaced - 9 windows, two of which are large bays. A major piece of work in a busy household of six people ranging in age from 76 to six years old. London Box Sash Windows could not have been more accommodating and helpful. A small glitch at the start of the work was dealt with immediately and professionally. The window fitters could not have been more friendly and helpful. The end result is excellent and completely in keeping with the Victorian features of the house. What could have been a messy and very disruptive experience was warm and professional with a high quality end product and all within the time frame. I thoroughly recommend this company.
K928639804 Posted on 17/05/2017 , work completed 17/05/2017
Highly recommend London Box Sash
Customer Service
Quality
Value
The initial consultation with Jack was great. He was polite, highly knowledgeable, very informative and not at all pushy. He offered various options for the wood/glass type to the final design. Although by no means the cheapest, both the high quality of the product and their experience means they are good value. The fitter, Andy, worked incredibly hard and obviously was highly experienced. He was also friendly and took pride in his work. The finished product looks great. I was also surprised how tidy everywhere was when Andy finished. I highly recommend London Box Sash.
jakeuk82 Posted on 21/04/2017 , work completed 21/04/2017
High quality product, excellent service, lovely company
Customer Service
Quality
Value
We have had seven windows and a single patio door replaced by London Box Sash over the last four months, in two batches. We would recommend them without reservation to anyone who wants to pay a bit extra for premium quality. The range of choices available is clearly explained with no pressure to buy any particular product, and every question we had was factually answered to our satisfaction. Booking fitting dates was stress-free and flexible, and if you can go with their standby schedule you can get a bit of a discount. The installation was professionally done, and most important of all, the quality of the product is lovely - with just the right combination of traditional appearance and modern technology (sound proofing, heat insulation, anti-condensation, long-lasting treated wood that doesn't expand etc), tailored to your particular choices. The people we dealt with (Jack, Patrick and Judith) were all pleasant and efficient, and it is lovely to see that a family-run company can compete successfully in this market. They deserve to flourish, and we thoroughly recommend them.
Alistair Fernie Posted on 15/04/2017 , work completed 15/04/2017
Excellent standards on product and service
Customer Service
Quality
Value
We replaced all the windows of our property with London Box Sash Windows and they not only provided an excellent product of superb quality but an outstanding customer service too. They were very flexible with our timings. Turned up on time every morning and left the property spotless each day and completed the job on time. Since the windows were fitted we have received various great and positive comments from neighbours and friends about them! We would definitely recommend them and with no doubt would hire them again. A fantastic team!
glorsa Posted on 15/04/2017 , work completed 15/04/2017
Friendly reliable company with high quality product
Customer Service
Quality
Value
I had four replacement sash windows fitted in the autumn having had others replaced previously by another company. There really is no comparison - both in the quality of the product and the customer service. All the staff at London Box Sash Windows are friendly, reliable and do a great job. The guys that came and fitted the windows were always on time, were respectful of my home and cleared up very well. The windows have made a real difference to the warmth of my home over the winter. I have no hesitation in recommending this company.
Cheryl Posted on 18/03/2017 , work completed 18/03/2017
Great Service and Result
Customer Service
Quality
Value
We could not rate London Box Sash highly enough. No hard sell, offer a high-quality product that you pay a little more for (as opposed to refurbishing existing windows, which was our original preference) but in our view, well worth the investment. Jack and Patrick clearly love what they do and made the whole experience a pleasure. They understood that new windows were a real investment for us and at no point did we ever feel we were given pressured into making a decision, and we were very patient with answering questions and their explanations. Our windows look beautiful and operate wonderfully. The whole process was great, the initial decision on which specification to installation. We were kept informed on lead times and it was never difficult to reach out and have questions answered. Andy, our fitter, was efficient, took care with the install, sealed off the rooms properly so the dust in the rest of the house was kept to a minimum. He takes real pride in his work and it really shows through in the windows. He discovered problems with the lintel above the bay window, but took initiative to resolve rather than turning it into an issue. Couldn't recommend highly enough.
MartinC Posted on 05/03/2017 , work completed 05/03/2017
Fantastic product and great company
Customer Service
Quality
Value
I had 4x new sash windows fitted at my flat in Balham and I can't speak highly enough about my experience with London Box Sash. From start to finish they were true professionals. Patrick and Jack did a great job measuring up and talking me through the various options, and I never felt under pressure. When it was time for the installation both their fitters (Andy & Anjelo) were first class. They protected the carpet in the entire communal hallway, dust-sheeted everywhere and when they left the flat was spotless. Great guys and never thought twice about handing them the keys. The product itself is perfect - really nicely weighted sash movement, great paint finish and I'm told the Accoya wood is incredibly durable. Patrick told me that cleaning the windows would be easy, because of the texture and quality of the Accoya, all I would need was a good quality shammy and any stains would come off with tap water. With that quality obviously comes a price, and as Jack will tell you these aren't cheap windows. Having lived with them for the last four months, the quality fully justifies the price. Ipso facto; trust received, responsibility given and taken. All in all, I wouldn't hesitate to recommend London Box Sash and their windows, which prove that a good idea, is a good idea forever. Tom Williams
Thomas Williams Posted on 17/02/2017 , work completed 17/02/2017