Dormer Extension - PD

[Expatman1]

I want to put a dormer to increase bedroom space. The dormer would extend partly over an existing 2.5m ground floor extension that was built 5 years ago and for which normal planning permission was granted. The dormer would finish approx 1 metre from the roof edge. All facing the rear of the house.
Is this okay?

 

[tony1851]

You will probably find that your LPA will regard this a a two-storey extension, subject to the rules of class A (extensions) rather than class B (roof enlargements).
If it is a class A extension, it might still be p.d. if it satisfies the conditions for that class.

 

[Expatman1]

You will probably find that your LPA will regard this a a two-storey extension, subject to the rules of class A (extensions) rather than class B (roof enlargements).
If it is a class A extension, it might still be p.d. if it satisfies the conditions for that class.

Thanks - house is not in conservation area or anything. It looks like I should be okay under Class A. Rear roof currently slopes from Apex to first floor level so 1st floor extension is really a "dormer" but by extending over original extension I can see that it could fall within Class A. Either way it looks okay.