An extension to your house is one of the ways to enlarge the space you already have. Being that you want a larger kitchen and dining space or a downstairs WCs and utility room, sometimes just by adding a couple of metres on the ground floor makes all the difference. Some of these extensions could be done without any planning permissions as long as you stay within the guidelines laid out by the legislation for you. If you are thinking of doing an extension here are some tips on the Permitted Development Rights regulations that you will have to follow that will be reiterated by your design team.
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General information for any extension
must not exceed the height of the existing dwelling
the extension eaves height must not exceed the existing eaves height must not be more than 50% of the original garden area, including any previous extensions (sheds are included and other outbuildings must be included when calculating the 50% limit)
materials should be of similar appearance to the existing house
must not include a veranda, balcony or realised platform
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Single-storey rear extension
maximum height 4 meters
must not be more than 3 metres if a attached house and 4 metres if semi-detached beyond the rear wall of the existing house
maximum eaves height 3 metres if within 2 metres of the boundary (eaves – point where the wall meets the roof)
Always check with the council because there may be a restriction on the property. It this is the case Planning permission will be required.
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Two-storey rear extension
Must not be more than 3 metres beyond the rear wall of the original house, and must not be within 7 metres of the rear garden boundary
Must not be beyond the side of the original house
Must be within 2 metres of any boundary
Roof pitch of extensions higher than one storey to match that of the existing house, as far as is practicable
Any upper-floor window in a wall or roof slope in a side elevation must be obscure-glazed and non-opening unless the parts which can be opened are more than 1.7 metres above the floor of the room in which it is installed.
Always check with the council because there may be a restriction on the property. It this is the case Planning permission will be required.

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