Any alteration to project no more than 150 millimetres from the existing roof plane.
Roof extension planning permission.
A mansard roof extension can represent a much more significant change however where full planning permission will.
The highest part of any roof light will be higher than the highest part of the original roof.
The height of the eaves where the wall meets the roof is no higher than 3 metres.
It s not higher than 4 metres including.
This is when measured perpendicularly from the external surface of the roof.
It doesn t go back further than 3 metres if it s a terraced house or 4 metres if it isn t.
Roof pitch must match existing house as far as practicable note that this also applies to any upper storey built on an existing extension.
National planning guidance concentrates on general loft extensions and conversions where dormers are more commonplace.
Any upper floor window located in a side elevation must be obscure glazed.
If your loft conversion plans include installing a roof light you must apply for householder planning permission if.
It s located at the back of the house.
If your extension will have one storey you don t need planning permission as long as.
A dormer roof extension can often be done without full planning permission under permitted development rights.
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.