Erection of a rear roof extension; erection of a rear extension at second floor level over part of the existing back addition, including raising height of existing chimney to the existing back addition; erection of a single storey rear extension to the side of the existing back addition; erection of an external staircase from lower ground to upper ground floor level at the front of the property, including installation of metal gate to front boundary; installation of 2no rooflights in the front roofslope; replacement of the existing window with a new window at first floor level to the rear elevation; replacement of existing doors with new French doors at lower ground floor level to the rear elevation; installation of a new front entrance door to replace the existing door at lower ground floor level; conversion of existing property from 2no self-contained flats into a single family dwellinghouse.