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Golden Ratio replaced a rotten sash window and sill, completely refurbished the sash box and redecorated it all. The price was competitive, and the work was carried out on time, quickly and extremely tidily. Elvis and his team were also very easy to deal with. I am pleased with the work and would be happy to hire Golden Ration again and to recommend them.


Elvis and his colleague did a very good job and cleaned up following works. All was completed well!


Elvis and his team did a fantastic job removing rotten wood from my balcony windows, replacing with new wood and varnishing it to a very high standard to look good as new. He also looked at the windows above and located the source of the leak that caused it, and sealed it up to avoid a repeat. And when that was all done he came back to nail in some wooden beading around the windows that had come loose at no extra charge, and even did some other bits that were nothing to do with the window just out of the goodness of his heart. He and his team were friendly, courteous and tidy, and I would thoroughly recommend them to anyone. Thank you!


We were delighted with Golden Ratio Windows. The lower rail of one of our sash windows had rotted through and we couldn't close the window. After trying several specialist sash window companies who were either too busy or wouldn't come out to look at just one window, I posted on My Builder. Elvis responded and offered to come and see the window within 48 hours. He came out punctually was very polite, told us we needed a new lower sash and quoted a very fair price. He went straight back to his workshop to make the new window and returned to fit it 3 days later. He replaced the cords, locks and handles and the end result is perfect. I will definately go straight back to Elvis next time we have any problems with our sash windows. Highly recommended.


The price was very competitive, and the service was quick, efficient and they left everything very clean.


Very happy with the work done. The window cords work perfectly, replaced pane and work on the frame is not noticible, they even painted the window sill. The team was very considerate, leaving everything clean and tidy. Excellent, thank you.


I have booked another window to be replaced. There are more to follow and will replace doors with this company


Elvis and his team did an excellent job. Timekeeping was perfect and the windows are just as promised. We are really pleased with the end result.


We're a hard working business who's main priorities are to:

  • Be punctual
  • Provide great quotes
  • Be honest and reliable
  • Exceed expectations
  • Value each of our clients
  • Provide quality workmanship
  • Be friendly and helpful

Here at Golden Ratio Windows we have built up an excellent reputation in our local area by offering the most comprehensive and expert service in London. From the planning stage to the finished article; we are with you every step of the way, making sure that whatever the task, you are completely satisfied with the end result. You can also rest assured that you will be receiving a professional, yet personal service for each job that we attend.

See our services

With so many years working in the trade, we are happy to answer any queries and provide quotes for any work that you are looking to have done. If you are in need of any work in London or the surrounding areas, then give us a call on 02034881695, or send us a message through our contact page.

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