• I want to upgrade a wooden sash window from single to double glazing by replacing just the sashes. I'll be DIYing the installation. How much should I be paying for that?

    Just had the first quote back for £1000+VAT

    (North London-ish recommendations welcome)

  • Kingswood joinery are around £1000 inc vat for a complete new timber sash.

  • We had ours upgraded by Wandsworth Sash Windows for £1k per window all in. Fitted and VAT included. So that does seem a little high.

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