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Replacing Windows
The short answer
For most unlisted houses outside an Article 4 area, replacing windows with ones of similar appearance is permitted development and needs no planning permission. Listed buildings, flats, Article 4 areas and big changes of style or material may need consent.
Last reviewed September 2026 · General guidance, not legal advice
Usually straightforward
Like-for-like replacement on an unlisted house, where the new windows are of similar appearance to the existing.
Worth checking first
- Listed buildings
- Flats and maisonettes
- Article 4 directions
- Changing material, opening style or glazing bars
- Making openings bigger
Building regulations still apply
Even when no planning permission is needed, replacement windows must meet building regulations. Installers registered with a competent person scheme can self-certify.