In order to keep within the 50m3 volume allowed within PD, I have suggested that we have a sloping roof on the wrap around dormer. This will also enable us to put solar PV on the two south facing roofs.
The architect is concerned that this will require planning permission but she cant say why! The Council refuse to give advice without a submission which takes 8 weeks. I have looked at the technical guidance for householders, particularly Class B and Class C, and I cannot see why this would not be permitted under PD. But Im sure the law and case law has lots of things in it of which I am not aware.
In the same road, there are two houses that have something similar on a side dormer only. I could not find a planning application for either of them on line. The differences as I see them between what Im proposing and what theyve built are:
The angle of the slope: their dormers have the same slope as the original roof; were putting in a much shallower slope probably c 17 degrees. This will give us more volume for the wrap around
Because our slope will be shallower, the flat portion of the roof will be larger and the amount of the existing roof remaining will also be greater Well have a slope on both the south and west walls; both existing dormers (including the wrap around dormer) only have a slope on the west wall.
Is my suggestion for a wrap around dormer with a half-sloping, half-flat roof permitted development?