Roof pitch must match existing house as far as practicable note that this also applies to any upper storey built on an existing extension.
Roof extension planning permission.
Any alteration to project no more than 150 millimetres from the existing roof plane.
And non opening unless the openable part is more than 1 7 metres above the floor.
It s not higher than 4 metres including.
It s located at the back of the house.
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.
A mansard roof extension can represent a much more significant change however where full planning permission will.
If your loft conversion plans include installing a roof light you must apply for householder planning permission if.
The height of the eaves where the wall meets the roof is no higher than 3 metres.
Any upper floor window located in a side elevation must be obscure glazed.
This is when measured perpendicularly from the external surface of the roof.
If your extension will have one storey you don t need planning permission as long as.
The highest part of any roof light will be higher than the highest part of the original roof.
It would protrude more than 15cm above the roof slope.