You will need approval however if.
Planning portal roof.
You carry out structural alterations.
In most situations this work will need building regulations approval.
They do not protrude more than 150mm beyond the plane of the roof slope they are no higher than the highest part of the roof.
Planning permission is not required for repair and or maintenance works to a roof including re roofing provided that the materials used are the same as those being replaced.
You do not normally need to apply for planning permission to re roof your house or to insert roof lights or skylights as the permitted development rules allow for roof alterations subject to the following limits and conditions.
To enable compliance with the requirements of the building regulations to be demonstrated full details of the new roof will be needed including.
Any alteration to project no more than 150 millimetres from the existing roof plane.
Planning permission building regulations new roof lights or skylights will not normally require an application for planning permission providing.
Flat roof this usually consists of felting which has a slight fall to allow rain water to drain off.
About planning portal adverts if you want to carry out repairs on or re cover less than 25 per cent of the area of a pitch or flat roof you will not normally need to submit a building regulations application.