Conversion of the existing property consisting of 2no. self-contained flats into a single family dwellinghouse; erection of a rear extension at first floor level, over part of the existing back addition; erection of a single storey rear extension, to the side of the existing back addition; removal of part of the existing single storey back addition to form a courtyard; erection of a 1.6 metre high obscured glazed balustrade around the flat roof of the existing back addition at second floor level, to form a roof terrace; and alterations to the front and rear facades including changes to the fenestration.