Sash Window Repair London

Windows that look better and last longer

Restore your original sash windows with repairs that improve lifespan, preserve character and avoid costly replacements

Trusted Craftsmanship, Backed by Real Reviews

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Robin Harris profile picture
Robin Harris
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Nick,Jack and Mickie installed draught-proofing and renovated my windows in my 19th century house. They were polite, tidy and did an excellent job. I highly recommend them.
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steven stallion
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Excellent. Jack, Nick and Robie were extremely professional, polite, informative. Top guys. Worked to a very high standard taking all care needed. Clean and tidy. Top Notch.
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Spencer Berry
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Nick and jack at Sash Window Preservation did a really nice job on our upstairs sash windows and also tricky alcove windows. They were lovely guys and no trouble to have round the house. Thanks guys and to the team
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Andrew Clark profile picture
Andrew Clark
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Alex did a great job. We’ve used the company for the third time and would highly recommend them again. Thank you.
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Alison Lewis profile picture
Alison Lewis
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Alex came to restore windows. He was courteous, professional and cleared up behind him. Would recommend this company.
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Alan Tunney profile picture
Alan Tunney
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We had the pleasure of Sash Window Preservation replacing sash window to our property and Jack and Nick completed the works in a polite and professional manner. I was was in the construction industry for over 45 years and find it hard to find any fault with these men. They were polite, reliable and very neat and tidy and nothing was too much trouble. They have done an excellent job I would highly recommend Jack and Nick and of course Sash Window Preservation. 10/10
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Andrew Lang profile picture
Andrew Lang
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Brilliant job by Scott and Shay, and the nicest guys to deal with. Thank you!!
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Sally Musitelli profile picture
Sally Musitelli
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We recently had our old sash windows restored and partially replaced, and the result is excellent. The craftsmanship is outstanding — the new windows are beautifully made and blend seamlessly with the originals, preserving the character of the property while significantly improving performance. Installation was carried out to a very high standard. The team — Adam, Ricky, George, and Gary — were professional, efficient, and clearly took pride in their work. Attention to detail was evident throughout, and everything was left clean and tidy at the end of each day. Overall, a very high-quality job from start to finish. Highly recommended.
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Emma Leach profile picture
Emma Leach
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Jack and Nick B were just incredibly good. Patient, gentle, precise, very careful. And really lovely people to have working in your home for a week. They did a wonderful job.
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Luna and Alessandro
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Gary and his wonderful team (George, Nick and Jack if I remember correctly) replaced our 120 year old Edwardian sash windows for exact modern double glazed replicas and we could not be more pleased. Beautiful windows, there is much less noise and the rooms are no longer cold. They draught proofed an older window too which now is like new. Fast and efficient service, and certainly fairly priced. Thank you! 10/10.
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Timber Sash Window Repair London

Trusted Timber Sash Window Repair London

No city has as many working sash windows as London. Most of these sash windows are over 100 years old and many are still original. Our sash window repair in London aims to keep the frames, glass and other original features of your sash windows intact where possible.

London Sash window rot repair and rebuilds

Across the capital we see painted shut sashes, broken sash cords with the top sash falling down, and misaligned meeting rails which rattle every time a bus or lorry goes by. Sills and the bottom rails of lower sashes are prone to the worst weathering, with signs of rot particularly where the old putty has cracked, allowing water to penetrate and sit against the timber.

Where timber has started to decay, we strip back the rotten wood, treat the remaining parts and rebuild them using the two-part epoxy resin Repair Care system. Larger sections can be repaired by joining in new timber using traditional joinery methods.

The benefits of repairing sash windows in London

A large share of the city is within conservation areas, and many councils restrict changes to front windows, sometimes through Article 4 directions. Repairing an original window as opposed to replacing it with a new one is often unproblematic and rarely queried, whereas a new one can be. Where necessary, we can make replicas of sashes, sills and frames that have decayed beyond repair, matched to the original profile. All of our new joinery is made in our Norwich workshop and our new sashes are made from Accoya timber, guaranteed for 50 years above ground.

We have been repairing and restoring sash windows since 2010. Based in Norwich, we are CERTASS qualified and a CHAS accredited contractor, and our teams clean up at the end of each day and leave your windows secure overnight.

Sash Window Repair FAQs

Do you provide sash window services in London?
Yes. As a Norwich-based company we travel across the whole of Greater London, including Islington, Highbury, Canonbury, Hackney, De Beauvoir, Camden, Primrose Hill, Hampstead, Bloomsbury, Marylebone, Clapham, Battersea, Wandsworth, Dulwich, Greenwich, Blackheath, Fulham, Richmond and Wimbledon. We have separate pages for Kensington, Lambeth and Barnet.
Do you work on Victorian and Georgian properties in London?
Yes. Many of the houses in the Bloomsbury and Marylebone areas stand on old Georgian squares, while the Islington, Hackney and Clapham areas are made up of long rows of old Victorian terraces. Further west there are many streets filled with Victorian and Edwardian sashes in the homes of Fulham, Richmond and Wimbledon.
Can sash window efficiency be improved in older London homes?
Yes. Draught proofing with discreet brush and seal strips fitted into the existing sashes cuts the cold air and traffic noise that get in on busy roads and lorry routes. Secondary, double and vacuum glazing options are also available where the building allows.
Can sash windows be upgraded while keeping their original appearance?
Yes. Listed buildings are a higher bar, but we understand listed-status requirements and are happy to work with you and your conservation officer to reach a sensible solution, repairing like for like. However, the final decision on consent is that of the local council.
Why should I choose Sash Window Preservation for my London property?
We specialise in period properties, and many converted terraces and mansion blocks need freeholder approval, so we provide a clear written quote you can pass to the freeholder or managing agent. For a free onsite or video quotation, call 01603 908 252.

Results that speak for themselves

The work speaks for itself.

Our skilled fitters helped to bring this beautiful Victorian bay window back to life in Bury St Edmunds:

Image of property where Sash Window Preservation are restoring and repairing sash windows
Amazing sash window repair carried out by Sash Window Preservation

Contact us today for sash window advice

For help with double glazing, draught proofing and bespoke sash window repair across the Eastern Counties and Greater London, get in touch with Sash Window Preservation on:

01603 908 252
01223 927 252
info@sashwindowpreservation.co.uk
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CASE STUDIES

Sco Ruston &
Hall

The Oaksmere &
Suffolk

Chiltern Hall &
Suffolk