Demolition of existing flat roof 3 storey extension to rear, single storey extension to rear, pool house and outhouses; construction of 2 storey extension to rear, single storey extensions to rear and sides, basement store, alterations to and renewal of existing roof; alterations to existing return comprising removal of intermediate floors and top flight of stairs, removal of windows serving ancillary spaces, alterations to existing internal walls of return to facilitate revised layout and new extensions; lowering of existing window ope to rear at first floor level; insertion of two windows at ground and first floor to front; blocking up of window ope and replacement of bay window structure at ground floor level; formation of new internal openings, addition and removal of partitions at ground and first floor levels, repairs to and upgrading of existing fabric internally and externally and associated site works.