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We specialise in the repair, restoration, and replacement of traditional timber sash windows across Hackney. Our master joiners blend traditional craftsmanship with modern techniques to preserve your home's character and improve thermal efficiency.
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Golden Ratio Joinery Ltd provides expert Sash Window Replacement Services for period homes throughout Hackney (E8, E9 & E5).
When a sash window is genuinely beyond repair — or a previous owner fitted unsympathetic uPVC — the right answer for a Hackney period home is a bespoke timber replacement built to match the original exactly, not an off-the-shelf substitute that jars against the rest of the terrace.
Every window is hand-made to the exact proportions of your existing joinery — the same sight lines, glazing bars and run-through horns — with modern performance built in:
A modified timber that resists rot and movement, carrying a 50-year anti-rot warranty so your new windows outlast the originals.
Cuts heat loss and the noise of busy Hackney streets while keeping the slim, period-correct look conservation areas require.
Fully weather-sealed and fitted to current building regulations, with FENSA certification supplied for your records.
With so much of Hackney under conservation control, replacement windows usually have to match the original design closely. That is exactly our specialism — conservation-grade timber windows that satisfy the council while delivering 21st-century warmth and security. Not sure replacement is the answer? Our surveyors will happily recommend repair or restoration where it makes better sense. See our price guide or browse all areas we cover.
Book a free, no-obligation site survey with our FENSA-registered joiners. We will assess your windows, explain your options honestly, and give you a transparent written quote. Call 020 3488 1695 or request a callback today.
We also provide expert sash window replacements across these neighbouring London areas:
A selection of recent sash window repairs, restorations and installations completed for homeowners across Hackney and North London.
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."
Queens Park
"The window is perfect. I couldn't be happier."
Yes. We regularly carry out sash window repair and restoration services in Hackney 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
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