Erection of a rear roof extension involving an increase in the ridge height by 250mm; erection of a rear extension at third floor level over part of the existing back addition; erection of a single storey rear extension, to the side and rear of the existing back addition following demolition of the existing single storey rear extension; installation of 3no rooflights in the front roofslope; installation of a new rooflight on top of the roof of the existing back addition at third floor level; replacement of 1no window with French doors and a Juliet balcony at both first and second floor level to the rear elevation of the existing back addition; installation of a new window to the side elevation of the existing back addition at ground floor level; formation of bike stores in the rear garden, bike stores and bin stores in the front garden together with associated landscaping; conversion of existing dwellinghouse into 1 x 1 bedroom and 2 x 2 bedroom self-contained flats.