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UK cost guide
Replacement windows are priced per opening, so the total depends on how many windows you have, the frame material, and whether upstairs windows need scaffolding. uPVC remains the cheapest option; aluminium, timber and sash windows cost noticeably more each.
Typical budget
£350 to £16,000+
Supply and fit for the whole job. A standard white uPVC casement window is typically about £300-£700 fitted.
Typical UK double glazing budgets by project size.
| Budget band | Typical cost | What it usually covers |
|---|---|---|
| Starter | £350-£3,000 | replacing one to five uPVC casement windows. |
| Mid-range | £3,500-£6,000 | replacing every window in a typical three-bed house in uPVC. |
| Premium | £7,500-£16,000+ | a whole house in aluminium, timber or sash windows. |
Supply and fit for the whole job. A standard white uPVC casement window is typically about £300-£700 fitted.
Prices checked October 2026. These are guide prices, not quotes. Prices vary by region, property, access and specification, so get itemised quotes before you commit.
Sources
Number of windows, their sizes and opening styles (casement, tilt and turn, sash or bay)
Frame material and finish: white uPVC, coloured foils, aluminium, timber or composite
Access and repairs: scaffolding for upper floors and making good rotten or damaged openings
Ask each shortlisted company to confirm the same scope and timeline. Avoid comparing quotes for different frame materials or glass specifications; also avoid using an installer who can't self-certify the work or arrange building control sign-off and paying a large deposit before a final survey has measured every opening.
| Quote check | Why it matters |
|---|---|
| Itemised scope | Shows whether labour, materials, waste, finishing and specialist trades are included. |
| Local availability | Prices vary by region, and London and the South East usually cost more. Lead times differ too, so ask when each firm can start. |
| Proof and aftercare | Insurance, warranties and verified contact details reduce homeowner risk. |
Share the scope, timing and postcode in the quote form. Free, no obligation.
We pass the request to up to three vetted specialists who cover your area.
Ask for itemised quotes and compare exclusions rather than using headline price alone.
Confirm insurance, warranties and payment milestones in writing before paying a deposit.
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