1)
The rear extension by reason of its size and siting would project beyond the rear building line and closet wing and would not respect the rhythm of the terrace. By infilling a historically valuable open space, the extension would disrupt the prevailing regular relationship between the house and rear garden. The proposal would fail to preserve the character and appearance of the conservation area, contrary to development plan policy in particular Core Strategy policies CL1, CL2 and CL3 and 'saved' UDP policies CD47 and CD63.
2)
The rear extension by reason of its detailed design would not relate well to the parent building, representing an incongruous feature that would fail to preserve the character and appearance of the property and conservation area, contrary to development plan policy in particular CL1, CL2 and CL3 and 'saved' UDP policy CD63.