Old - Single glazed wood sash windows x 8 New - Double glazed upvc wood grain sash windows x 8 SJB Windows were BRILLIANT! Quote - good value, precise and beat numerous other FENSA compa... See more
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Review summary
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I was very impressed with SJB throughout - from the first visit to the installation itself, everyone we dealt with was professional, helpful and really efficient. The fitting was extremely smooth and... See more
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The windows are beautiful and look really great installed. The entire process from measuring/ordering/fitting was incredibly smooth and the fitter was a total craftsmen leaving a very professional fi... See more
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The three guys (CJ, Leroy and Blogi) were all really conscientious and hard-working professionals. I had 10 windows replaced and they clearly realised that it was a big and stressful deal for me - so... See more
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Company details
Information provided by various external sources
We’re a family-run business specialising in both manufacturing and installation of traditional sash windows. Although we mainly install our sash windows in London & the south-east of England, our sash window services reputation is known much further afield.
Contact info
United Kingdom
- sjbsashwindows.co.uk
4.8
Excellent
329 reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 100% of negative reviews
Typically replies within 1 week
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SJB were highly professional
SJB were highly professional, from first visit to see the house to the state the window fitters left on completion, with everything clean and tidy and with the work completed ahead of plan by several days
May 28, 2026
Reply from Sjbsashwindows
Thank you for your kind review. We’re delighted to hear that you were pleased with the professionalism of our team from the initial visit through to completion.
It’s great to know the installation went smoothly and that our fitters left everything clean and tidy. We really appreciate your feedback and thank you for choosing SJB.
I thought SJB Sash windows were…
I thought SJB Sash windows were excellent, they did a really professional job and were charming to deal with. Jess Wilder
May 19, 2026
Reply from Sjbsashwindows
Thank you so much, Jess, for your kind words.
We’re delighted to hear you were happy with both the workmanship and the service from the team.
It was a pleasure working with you, and we really appreciate you taking the time to leave such a lovely review.
I was very impressed with SJB…
I was very impressed with SJB throughout - from the first visit to the installation itself, everyone we dealt with was professional, helpful and really efficient. The fitting was extremely smooth and they took great care of our property. We’re really happy with the look of the windows too.
April 20, 2026
Reply from Sjbsashwindows
Thank you so much for your kind feedback.
We’re delighted to hear that you were impressed with the whole process, from the initial visit through to installation.
Our team takes great pride in providing a professional and efficient service while treating every property with care and respect. It’s wonderful to know you’re so happy with the finished look of your new windows.
Thank you again for choosing SJB.
Great company and efficient window…
Great company and efficient window installation service.
April 28, 2026
Reply from Sjbsashwindows
Thank you for your kind words! We're really glad you were happy with both our team and the window installation process. It means a lot to us that you found the service efficient, enjoy your new windows!
Reply from Sjbsashwindows
Thank you for your kind feedback! We're really pleased to hear that you were happy with both the product and the delivery timeline.
Excellent customer service
The service was excellent, all staff were professional and courteous from start to finish. SJB is family run and they care about the customer as well as clearly being technically strong, and very knowledgeable in what needs to be done and how to get the best results for your windows. I would thoroughly recommend.
March 20, 2026
Reply from Sjbsashwindows
Thank you so much for your kind words and thoughtful feedback. We’re delighted to hear that you had such a positive experience with our team from start to finish.
As a family-run business, providing a professional, friendly service and delivering the best possible results is at the heart of what we do, so it’s incredibly rewarding to know that this came across. Your recommendation truly means a lot to us.
If there’s ever anything more we can help you with in the future, please don’t hesitate to get in touch!
Reply from Sjbsashwindows
Thank you for taking time to give your feedback.
Sash window replacement success
Clear details of costings, materials and installation requirements were provided and the installation went ahead with a minimum of fuss; floor coverings and final dust removal were well executed and a follow up visit to free up the sash window occurred without question. I would certainly use this company again.
February 26, 2026
Reply from Sjbsashwindows
Thank you for your kind review. We're glad to hear the installation went smoothly and that you were happy with the overall service, including the follow-up visit.
We really appreciate your recommendation and would be happy to help again in the future.
The SJB team
Brilliant
Great company to deal with from start to finish, and the windows are beautifully made and look great. Thanks for all.
February 25, 2026
Reply from Sjbsashwindows
Thank you so much for your kind words! We’re delighted to hear you had a great experience with us and that you’re happy with how your windows turned out.
It truly means a lot to our team. If you ever need anything in the future, we’re always here to help!
The SJB team.
The windows are absolutely gorgeous
The windows are absolutely gorgeous. I am so so happy with them, and the workers from SJB were also so lovely, kind, and communicative.
February 9, 2026
Unprompted review
Reply from Sjbsashwindows
Thanks for the feedback
We’re glad you’re happy with the windows and that the SJB team made the process a good experience.
We appreciate you taking the time to share this and will pass your kind words along to the crew.
SJB replacement sash windows
Very impressed with this company, from start to finish the experience was easy , professional & excellent quality.
My project & installation team communicated regularly, the guys on site managing the sash replacements were friendly, considerate & delivered an impeccable finish.
Not a cheap product, but you get what you pay for & I am over the moon with my new windows. Would thoroughly recommend!
January 28, 2026
Reply from Sjbsashwindows
Dear CJ,
Thank you so much for taking the time to leave such a lovely review, we really appreciate it.
We’re delighted to hear that you had a smooth experience from start to finish and that the project and installation teams looked after you so well. It’s great to know the communication, on-site professionalism, and final finish all met your expectations.
We’re especially pleased that you’re over the moon with your new windows, that’s exactly what we aim for. Thank you again for choosing us and for your recommendation; it genuinely means a lot to the whole team.
All the best,
The SJB team.
Excellent experience from start to…
Excellent experience from start to finish. Blago in particular was amazing. He was professional, helpful, very tidy and always friendly and courteous.
October 1, 2025
Unprompted review
Reply from Sjbsashwindows
Thank you so much for taking the time to leave this lovely review. We’re delighted to hear you had an excellent experience from start to finish. Blago will be especially pleased to hear your kind words — his professionalism, attention to detail, and friendly manner are things we really value. We truly appreciate your support and hope to work with you again in the future.
Excellent consultation and great…
Excellent consultation and great customer service, all of which made the process of getting new windows installed incredibly easy.
Our bedroom is now much improved and much warmer than prior to installation.
January 21, 2026
Reply from Sjbsashwindows
Thank you so much for the kind review! We’re really glad to hear you had a great consultation experience and that the installation process felt easy from start to finish.
Even better to know your bedroom is now warmer and more comfortable—that’s exactly what we aim for.
Thanks again for choosing us, and don’t hesitate to reach out if we can help with anything in the future!
The SJB team
The box window replacement was smoothly…
The box window replacement was smoothly managed, with minimum disruption /mess.
January 27, 2026
Reply from Sjbsashwindows
Thank you for taking the time to leave a review. We’re really pleased to hear the box window replacement was handled smoothly with minimal mess. It was a pleasure working for you.
All the best,
The SJB team.
Loving our new windows
Easy to ask and obtain information to make an informed decision. Purchase, delivery and installation was easy to organise. Happy with our windows.
November 13, 2025
Reply from Sjbsashwindows
Thank you so much for your kind review! We’re delighted to hear that you found the process easy from start to finish and that you’re happy with your new windows.
Helping our customers make informed decisions and enjoy a smooth experience is always our goal. If you need anything in the future, we’re here to help
Professional
Good products, professionally managed process and installers. Would recommend
January 5, 2026
Reply from Sjbsashwindows
Thank you for your kind review! We’re glad you’re happy with the products and found our process and installers professional. We really appreciate the recommendation and your support.
Very Professional
From initial visit, quotation and completion this was a very smooth job. It was unquestionably a difficult 4th floor window replacement and our installer, Constantine, was a multi-skilled professional who just got on with it, where others might have balked. Lovely windows as promised.
December 9, 2025
Reply from Sjbsashwindows
Dear Scott,
Thank you for taking the time to share your experience. We’re delighted to hear that the process, from quotation to installation, went so smoothly. Your project was indeed a complex one, and we’re proud that Constantin’s expertise and can-do approach helped ensure everything was completed to a high standard.
We’re equally pleased that the new windows have met your expectations. Your feedback means a great deal to us, and we appreciate the confidence you placed in our team.
The SJB team
Beautiful quality windows and door
Beautiful quality windows and door. Ordering process and pre-installation contact efficient and responsive. Installer very nice, polite and tidied up well. Only misses 5 stars because of untidy paint retouching (recommend asking SJB not to retouch edges of windows and just do these yourself with masking tape later).
October 15, 2025
Reply from Sjbsashwindows
Thank you so much for your thoughtful review and for choosing us for your windows and door installation. We’re delighted to hear that you were pleased with the product quality, ordering process, communication, and the professionalism of our installer.
We’re sorry to hear the paint retouching didn’t meet expectations. Your feedback is very helpful, and we’ll make sure it’s passed on to the team so we can improve this part of the process.
Thank you again for your honesty and for the 4-star rating, your insights help us get closer to 5 stars next time. If there’s anything else we can assist with, please don’t hesitate to get in touch.
The SJB team.
Good job done, thank you
Professional service and a polite operator who did a neat job and cleared up afterwards.
November 24, 2025
Reply from Sjbsashwindows
Thank you so much for your kind review!
We’re really glad to hear you were happy with the service. Our team takes pride in being both professional and tidy, so it’s great to know this came through. If you ever need anything in the future, we’ll be more than happy to help.
The SJB team.
Josh was fantastic and the window was…
Josh was fantastic and the window was installed in a morning and looked great thank you
October 27, 2025
Unprompted review
Reply from Sjbsashwindows
Thank you so much for your lovely feedback! We’re delighted to hear you’re happy with your new window. We’ll be sure to pass your kind words on to Josh — he’ll be thrilled to know you’re pleased with the result.
All the best,
The SJB team
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