1)
The proposed dormers due to their form, profile, architectural design, size and scale would fail to respect the existing context, character and appearance of the host property, mews and the wider Pembridge Conservation Area. There are no public benefits that would outweigh the harm that would be caused and therefore the proposal would fail to preserve or enhance the character and appearance of the Ladbroke Conservation Area and would be contrary to policies CL1, CL2, CL3, CL6, CL8 and CL11 of the Local Plan 2019 and the requirements as set out in the NPPF.
2)
The proposed development, by virtue of its design and siting on the rear roofslope, would result in an harmful level of overlooking and loss of privacy to neighbours located at the rear boundary of the site. It would fail to ensure good living conditions for neighbouring properties, contrary to policy CL5 of the Local Plan 2019.