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You do not normally need to apply for planning permission to re-roof your house or insert roof lights or skylights.

However, there are some special rules which govern extensions to the roof. You will need to apply for planning permission if you live in a Conservation Area, A National Park, an Area of Outstanding Natural Beauty or the Boards and you want to build an extension to the roof of your house or any kind of addition which would materially alter the shape of the roof.

Note: A roof extension counts towards the total volume limit of your house.

You need to apply for planning permission if any of the following is true:

• The work would make some part of the house higher then the highest part of the existing roof.

• A roof extension would add more than 40 cubic metres to the volume of a terraced house or more than 50 cubic metres to any other kind of house.

• For a terrace house, the volume of the ''original house'' would be incresed by more than 10% or 50 cubic metres (whichever is greatest).

• For any other kind of house, the volume of the ''original'' would be increased by more than 15% or 70 cubic metres (whichever is greatest).

• The volume of the ''original'' would be increased by more than 115 cubic metres.

Note: The term 'original house' means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date) although you may not have built an extension to the house, a previous owner may have done so.

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