Alterations including erection of rear mansard roof extension involving raising ridge 300mm, insertion of rooflights on front roof pitch, roof extension above rear outrigger, ground floor rear and side extension, squaring off existing first floor rear addition with creation of roof terrace with 1.7m high balustrade at second floor level, alterations and replacement of windows on front and rear elevations, conversion of 2 flats to 4 flats (1�3-bed, 1�2-bed,1�1-bed/2-person, 1�1-bed/1-person) with associated refuse and cycle storage.