The proposed two storey side extension, by reason of its scale, form, mass, design and position is considered to be harmful to the modest, utilitarian and traditional character of the existing building and detract from its setting in the landscape. The proposed extension would appear as a dominant feature which would compete with the existing two storey part of the property. The proposal would significantly obscure the little-altered north and east elevations of the property and would fail to respect its existing architectural character contrary to the requirements of Development Policies 3 and 19 of the NYM Core Strategy and Development Policy Document together with the advice contained within Part 2 of the Authority's adopted Design Guide.