Sash windows (UPVC & timber) in London
From £900
| Service | Typical price in London |
|---|---|
| UPVC double glazed windows | £563 - £1,125 |
| Sash windows (UPVC & timber) | £1,125 - £3,000 |
| French & patio doors | £1,625 - £4,000 |
| Bay & bow windows | £2,000 - £4,750 |
| Secondary glazing | £438 - £1,188 |
Sash window quotes for London’s Victorian and Georgian stock
Roughly half of London’s inner-borough housing was built between 1840 and 1914, which means sash windows are still the default original detail on streets across Islington, Hackney, Camden and Wandsworth. Legacy Windows is a quote comparison service that puts your brief in front of joiners and installers who genuinely work on box-sash rebuilds, slim double-glazed timber replacements and cord-and-weight restoration, not firms who only offer casement swaps.
Why locals in London choose Legacy Windows
- Realistic London pricing: expect £1,125 to £3,000 per sash fitted, depending on timber versus UPVC and glazing spec
- Listed Building Consent is common in Westminster, Camden and Islington, and our shortlisted joiners already handle the paperwork
- Slim-profile double glazing (14-16mm sealed units) is offered for streets where full 28mm cavities would breach conservation-officer sightlines
- Draught-proofing and cord replacement is quoted as a separate line, so you can refurbish rather than replace where that is the right answer
- Timber sash refurbishment is offered as a like-for-like alternative to plastic, keeping original glazing bar proportions
Areas we cover around London
Sash restoration briefs come to us most often from N1 Islington, N7 Holloway, NW1 Camden, W1 Marylebone, W2 Paddington and SW1 Pimlico, plus the Georgian squares of Kensington and terraced streets across Hackney, Greenwich and Wandsworth. Article 4 boroughs (Islington and parts of Hackney) get special attention because permitted development rights are stripped and a full planning application is often needed.
Frequently asked questions
Do Victorian sash windows in Islington need timber replacements? On any street inside the borough’s Article 4 Direction, yes: UPVC and aluminium replacements are almost never approved on the front elevation. Rear elevations are usually less restrictive, but check the planning portal before ordering.
Can original sashes be refurbished rather than replaced? Very often, yes. Where the frame timber is sound, draught-proofing brushes, new cords, parting beads and slim double-glazed panes can bring a 120-year-old sash up to a Uw around 1.6 W/m²K without touching the outward appearance.
What is the typical lead time on a bespoke timber sash for a London property? Six to twelve weeks from survey to install for made-to-measure timber, versus three to five weeks for a UPVC vertical slider from a stock profile.
Windows and doors in London - local context
Victorian and Edwardian terraces dominate inner boroughs, alongside interwar semis in outer London, 1960s-70s tower blocks, and modern glass-fronted apartments in redevelopment zones like Nine Elms and King's Cross.
Dominant era of housing stock: Victorian to Edwardian across inner London, interwar in outer boroughs.
Heritage note: London has over 1,000 conservation areas across 33 boroughs - always check with the local council planning portal before ordering.
- Islington
- Hackney
- Camden
- Wandsworth
- Greenwich
- Ealing
- Croydon
Postcodes we cover in London
- E1
- EC1
- N1
- NW1
- SE1
- SW1
- W1
- WC1
- W2
- N7
- SE15
- SW9
- E14
- E17
Not seeing your postcode? Request a quote anyway - we likely still cover it.