Menu
London's trusted window installation service — call us for a free site survey.
Get a quote
We specialise in the repair, restoration, and replacement of traditional timber sash windows across Chelsea. Our master joiners blend traditional craftsmanship with modern techniques to preserve your home's character and improve thermal efficiency.
No obligation · Free site survey · Reply within hours
Golden Ratio Windows provides specialist Sash Window Repair in Chelsea and across the surrounding London neighborhoods.
Period properties in Chelsea deserve expert care. We address issues ranging from rotting sills to jammed sashes, ensuring your historic windows are restored to smooth operation without losing their character.
Our repair services include replacing worn-out sash cords, servicing pulleys, and addressing draughts. Chelsea is renowned for its premium Victorian red-brick townhouses and classic Georgian terraces. Windows in these conservation areas must meet strict Article 4 directives regarding glazing profile and timber finishes.
Many homes near King's Road, Sloane Square, and the Chelsea Embankment suffer from rattling windows due to stretched or broken cords. We use high-durability waxed cotton cords and carefully re-balance the internal lead weights to ensure effortless gliding.
Our master joiners offer heritage-focused sash window repairs in London. From Chelsea (SW3) to neighboring conservation grids, we keep your period homes draft-free and secure.
We have helped hundreds of London homeowners upgrade their inefficient single-glazed windows.
Finsbury Park
"Saved our original Victorian windows when others said replace. Beautiful workmanship — our sash windows look brand new."
Stoke Newington
"Draughts completely gone. Warm house for the first time in years. Fair price and they clearly know period properties inside out."
Central London
"They completely replaced two windows in our Edwardian home. Friendly, communicative and done quickly — in just 2 days."
North London
"The detailing is very well done and accentuates the property nicely. The whole front of the house looks much better as a result."
Yes. We regularly carry out sash window repair and restoration services in Chelsea and all surrounding boroughs. We offer free site surveys for all local residents.
Yes, absolutely. We specialise in retrofitting slimline double-glazed units into original timber sash windows. This means you don't have to rip out the entire window box, saving money and preserving the historical character of your property.
Costs vary depending on the extent of the damage (e.g., rotten sills vs simple broken cords). However, repairing is almost always significantly cheaper than a full replacement. We provide completely transparent, itemised quotes after a free survey.
Stop the draughts and start saving on energy bills. We offer a free, no-obligation survey and quote for all window upgrades across London.
218 Hornsey Road, London, N7 7LL
Fill in the form and we'll get back to you within one business day.
