Scores within last 12 months

Reliability & timekeeping
Invoice History
Charged as per quote / estimate100%
Appointments reported as missed (6 months) 0
Average score 9.96

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We are a premium sash window and door bespoke workshop. We manufacture our windows and doors in house, and we encourage our prospective customers to visit us at our workshop in Hackney London so we can show you in person what we do and how we do it.

Our single- and double-glazed sash windows, casement timber windows and french doors are produced by time served craftsmen in our Hackney London workshop, faithfully replicating original features using traditional joinery methods. All selected timber is preservative treated, hand prepared and the wooden window frames are either spray paint finished, or hand painted.

At Golden Ratio Sash Windows, we appreciate the value and importance of sash windows within period properties, and strive to make them a practical, functional and yet beautiful feature of your home. We offer a full draught proofing service to ensure that your windows remain rattle-free and retain the heat in your home. We can re-cord windows that no longer work and restore windows that have been painted shut. Our products are covered by a comprehensive ten year guarantee which has optional insurance backing and is fully transferable.

Our range of double-glazed windows are designed to keep your house warm all year. Two 4mm glass panes separate an 8mm cavity to reduce heat loss through your windows. Your home will be more energy efficient and you’ll save money on your heating bills. Golden Ratio windows and doors add curb appeal and value to your home, but their energy efficiency will save you money! All our windows are custom ordered to the exact size you need and the style you want, and they meet stringent industry standards for insulation, structural strength and resistance to the elements. Our windows are designed to withstand even the worst weather in London. We believe that the quality of the installation process is just as important as the quality of manufacturing. Our craftsmen are trustworthy and flexible enough to work around your needs and lifestyle. Ours installers will treat your home with care and respect by keeping work areas clean, tidy and safe.

Please do get in touch with us to discuss any of your carpentry or joinery needs. We offer a free survey, a professional service and a final product you will love forever.

Buy the highest quality direct from the manufacturers.


Based in


Works in

London, Barking