Erection of a rear roof extension involving an increase in the ridge height by 300mm; erection of a rear extension at second floor level over part of the existing back addition; erection of a single storey rear extension to the side of the existing back addition; installation of 1no rooflight in the front roofslope; remodelling of existing ground floor rear extension including new doors and windows; alterations to the rear addition's roof; conversion of existing dwellinghouse into 2 x 2 bedroom self-contained flats.