Alterations and improvements to a building containing flats
If you live in a flat, you will have some permitted development rights for alterations which do not enlarge the building of which your flat is a part.
You will not require planning permission for these types of alterations, provided that:
- the alteration does not protrude from any outer wall or any part of the roof by more than one metre
- the existing dimensions of any window or door are not altered (i.e. the window or door is not enlarged - merely replacing the windows or doors within the existing openings don't require planning permission)
- the alteration does not result in a balcony
- it does not result in a platform or terrace if located on the roof.
The above permitted development rights don't apply if your building is listed or is located in a conservation area. If it is, you will need to apply for and receive planning permission before you carry out the work.
A building warrant might be required for the work you are considering.