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Whole-House Window Replacement Cost
A whole-house window replacement for a typical 3-4 bed home usually falls between £20,000 and £70,000, with partial projects starting from around £8,000.
3 min read
Replacing every window in a house is one of the larger investments a homeowner makes in the building fabric, and understandably one of the first questions is simply what it costs. As a guide range, a full replacement for a typical 3-4 bedroom home runs £20,000–£70,000, with partial projects, such as replacing windows on one or two elevations, starting from around £8,000.
That is a wide range because house size, window count, frame material and specification all vary so much between properties. This guide sets out how to narrow that range down to something closer to your own home before you arrange a survey.
Why the range is so wide
| House profile | Likely position |
|---|---|
| Smaller 3-bed, standard uPVC-style Residence, standard colours | Lower third of the range |
| Larger 4-bed, mixed aluminium and Residence, some larger openings | Middle of the range |
| Larger period or characterful home, mostly aluminium, bespoke sizes, conservation input | Upper third or above |
Beyond frame material, the number and size of windows matters more than almost anything else. A compact cottage with eight modest openings will cost markedly less than a larger house with fifteen windows including large picture frames or bay configurations, even at the same specification level.
Partial replacement versus full replacement
Not every project needs to cover the whole house at once. Replacing windows on the most exposed elevation, typically the side that takes the worst of prevailing weather, is a sensible way to phase a budget, starting from around £8,000 for a handful of windows. The trade-off is two separate survey and installation visits rather than one, and the risk of a visible mismatch in frame colour or age between phases if you wait too long between them.
- 01Prioritise by conditionIdentify the windows that are failing, draughty or beyond economic repair first.
- 02Prioritise by exposureIn Cumbria, west and south-west elevations often bear the worst weather.
- 03Match specification across phasesKeep colour and frame profile consistent even if you split the project by time.
- 04Plan the whole house even if phasingA single survey covering every opening avoids inconsistent detailing later.
What a whole-house figure typically includes
- Survey and design consultation across every opening
- Manufacture of each frame to measured sizes
- Removal and disposal of existing frames
- Installation by experienced teams we know and trust
- Making good internally and externally around each opening
- FENSA or Certass certification on completion
Budgeting sensibly
Because whole-house projects are significant investments, it is worth getting more than one survey and quotation, provided each is itemised in enough detail to compare fairly. A cheaper headline figure that excludes making good or certification is not necessarily better value than a slightly higher figure that includes everything.
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