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We specialise in the repair, restoration, and replacement of traditional timber sash windows across Islington. 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
If you live in North London and your original timber windows are beyond saving, Golden Ratio Windows provides authentic sash window replacement designed to meet strict conservation rules.
Living in a period property is wonderful, but dealing with rotten sills, extreme draughts, and single-pane glass isn't. When repairs just aren't enough to save your old frames, we step in to handle complete sash window replacements in islington. We know the area inside out—from the classic Georgian townhouses around Canonbury to the tall Victorian terraces in Barnsbury. We've spent years fitting new timber windows that look exactly like the originals but perform to modern standards.
If you're unsure about the styles we can match, take a quick look at our windows guide to see the different profiles available.
When you book us for your sash window replacements in islington, we handle the whole process from start to finish. We don't use off-the-shelf plastic frames. Instead, our joiners build everything bespoke using sustainably sourced timber. This means we can precisely copy your existing glazing bars, horn details, and architraves. The big difference? The new windows come fitted with slimline double glazing, bringing your home into the 21st century for warmth and noise reduction, without upsetting the local planning office.
It's a big decision to pull out old joinery. If you want to know more about the structural side of things, read our guide to sash window replacement.
We believe in keeping things simple and honest. The first step for any sash window replacements in islington is a relaxed site visit. We'll pop round, measure up your existing frames, and give you straightforward advice on what needs doing. No hard sales pitch, just proper joinery advice. You can check out some of our recent work in our gallery to see the finish we achieve.
Ready to finally sort out those old windows? Get in touch via our contact page and we'll arrange a free quote.
Golden Ratio Windows is committed to top-tier craftsmanship. Whether you need full sash window replacements in London or just a simple overhaul, our FENSA-certified team is here to help.
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 Islington 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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