What replacing a window costs
The two jobs people ask me about most, one new window and one failed sealed unit: what each costs fitted, what moves the price and what a written quote must include.
- Single replacement windowA single replacement window is the cleanest way to test a quote.from £350typically £510one standard white uPVC casement window, supplied, fitted and the old one removed
- Sealed unit replacementWhen the glass has misted between the panes, the sealed unit has failed and the frame is usually fine.from £50typically £170one failed sealed unit in a standard casement window, supplied and fitted into the existing frame
Which of the two jobs is yours
If the glass has misted between the panes and the frame is sound, you need a new sealed unit, not a new window. If the frame is rotten, warped or past repair, or the window is draughty and will not close properly, you need a new window. A firm that wants to sell you a whole window for a misted pane should be able to tell you why.
Each page shows what its job typically costs fitted, what moves the price and what a written quote should include, so you can compare like with like.
Before you sign
Get the quote in writing and ask how the work will be certified. Whoever fits it should give you the certificate to keep, because it matters when you sell. Then put each figure through the quote checker, or weigh several together with compare quotes.
Get quotes for your home
A guide price only takes you so far. Local firms can price the work on your own home, and comparing a few quotes is the quickest way to see what is reasonable.
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