Expertly Fitted Sash Windows, Tailored to Your Home

"Liam and Christian have now completed fitting the new kitchen doors and together with Lewis, who was here yesterday, have done an excellent job and left everything neat and tidy.  "

Ms B, Oxfordshire, February 2025

"Please do thank the team again for taking such a good care of our windows. Even our builders have complimented!"

Ms S, London, February 2025

"It has been a genuine pleasure dealing with you and everyone at the company. We would highly recommend your services to anyone."

Mr & Mrs H, Hampshire, Feb 25

"We are very pleased with the windows, they look fabulous!. The guys were great to have in the house and worked really hard."

Ms M, Hampshire, January 2025

"Box Clever were responsive, reliable and expert. The whole process from quotation to installation was easy and we are delighted with the high quality windows. The house is warmer, draught free and quieter. Our neighbours immediately ordered windows from Box Clever too!"

Ms M, Oxford, December 2024

"Excellent service from start to finish. Questions answered quickly. Fitting the windows went smoothly and the young men were professional and kept everything as clean as possible. Very good company which I would highly recommend."

Ms M, Hampshire, November 2024

"Fantastic from start to finish! The team fitted 5 sash windows in my home and I’m very happy with the quality of the finish. The team were very professional and it is evident that they are experts in their field and take pride in what they do. There was no pushy sales pitch, instead Simon was very open and honest when presenting options and the price was very competitive. During installation, the team were friendly, tidy and efficient. I highly recommend Box Clever Sash Windows!"

Mr C, Berks, August 2024

"Amazing, friendly, professional service from start to finish. Installed two large Masterframe Bygone range sash windows. Lovely, honest and highly experienced family business who explained the whole process and couldn’t be nicer to deal with. I love my new windows!"

Ms J, Bucks, August 2024

"Thanks to everyone for fantastic service, installation & communication – very happy I chose Box Clever."

Mrs H, Hampshire, July 2024

"We wanted to say how delighted we are with our new sash windows. They look absolutely fantastic and we could not be happier. [...] Thanks also to the guys who did the fitting, they were fantastic."

Mrs S, Hampshire, June 2024

"I am so very grateful to you for all you efforts [...] you really went above and beyond to help me. Please thank all concerned at the Box Clever team."

Ms N, London, May 2024

"We chose Box Clever Sash Windows after having a poor experience with another company and I’m so glad we did! Tony and Simon made me feel really comfortable and were great in helping me explore all the options and provided the necessary quotes with no hard sale or pushiness, unlike other companies I had encountered. The whole experience was a breeze. Their communication and responsiveness was faultless and the installation team worked quickly and left the place tidier than they found it! Not to mention, the windows are of great quality and look fantastic too. Would 100% recommend."

Ms C, Hampshire, May 2024

"Please thank Tony and ALL TEAM, the lads are such a pleasure to have working in the house and the workmanship is better than we expected. Tony and Syreeta make everything so easy, we cannot recommend you enough."

Mr P, Berkshire, March 2024

"I cannot fault the experience in any way with Box Clever Sash Windows. From the outset, Tony and Syreeta were so accommodating from being very responsive, answering all our questions and meeting to our requirements. [..] Simon and the install team ensured that any space where they were working was properly protected and I was so impressed that there was no mess at all where work had been carried out. [..] I have more work to do in the future and will be for sure be using Box Clever Sash Windows again. Thanks Team!"

Mr D, Berkshire, March 2024

"Thanks to you and all the team: I've met a number of the installers over time but Lewis and Simon have probably done the most and always been exemplary in their manner and how they engaged with me."

Mr E, North Hampshire, February 2024

"We had decided to use Box Clever right from the beginning when Tony came round and gave us our quote. After getting quotes from 4 other company’s they were the only one that listened to what I wanted. The installation team, Lewis and Simon, were so considerate and tidy when working in the house and each window was installed and finished with the same time, care and high standard. I would highly recommend using them."

Ms H, Berkshire, Jan 2024

"We are so pleased with the windows – immediately see the difference with keeping the heat in over the recent cold snap. They look lovely and work better than we hoped for. Really successful. The install was complex, but the boys were great. Do pass on our thanks to the team and Syreeta in the office."

Mr S, West London, Jan 2024

"I'm really happy with the windows and French Doors - they make such a difference to the house. The guys did a great job fitting them (and tidying up afterwards too!)."

Ms Q, Berkshire, Dec 2023

"The team at Box Clever did an amazing job replacing our sash windows. All the work carried out was to the very highest standard, efficient and super tidy too! Can’t recommend them enough."

Mr L, Hampshire, Dec 2023

"I am delighted with the service received from Box Clever Sash Windows. The entire team, from Tony's initial visit to Lewis, Simon and Christian installing the windows and Syreeta helping with queries and payments, were an absolute pleasure to deal with. The windows look fabulous, thank you "

Mrs F, Hampshire, Oct 2023