Sash and heritage window specialists
Find a sash window specialist you can trust
Compare local companies for sash window repair, draught-proofing, double glazing and like-for-like replacement. See who works on listed buildings and in conservation areas before you ask for a quote.
Launching across London first, then nationwide.
Services
What do your windows need?
Why use SashWindow.co
Sash windows only
Every company here works on timber sash windows. No general glazing firms padding out the list.
Heritage experience shown up front
See which specialists work on listed buildings, in conservation areas, and can prepare drawings for consent.
Compare before you call
Typical prices, guarantees, glazing options and accreditations side by side, so you know who to contact.
For architects, contractors and the trade
Specifying sash windows for a larger project?
Find manufacturers, joinery workshops and installers who take on multi-unit, heritage and refurbishment work, and the suppliers behind them: glass, hardware, mouldings and draught-proofing systems.
Guides
Know what you’re asking for
- Sash window prices
What repair, restoration and replacement cost in 2026 - Sash window repair
What a full overhaul involves - Double glazed sash windows
New windows, new sashes or slim glazing - Secondary glazing
Warmer and quieter, and fine for listed homes - Draught-proofing
Stop the draughts and rattles - Victorian and Georgian windows
How to recognise and look after them
For sash window specialists
Get found by homeowners and specifiers looking for your work
A basic listing is free. Show the areas you cover, your heritage experience and your typical prices.