Conversion of the existing property into two self contained residential units and one self-contained residential dwelling with provision of associated amenity space, cycle storage and refuse storage facilities; alteration of roof from hip to gable end; rear roof extension and installation of two roof lights to front roof slope, single storey, part two storey side/rear (wraparound) extension and installation of window to front roof slope (following demolition of existing side addition, rear addition and chimney stack); single storey front porch extension; alteration to external elevations, involving installation of two windows to side elevation; alteration to boundary treatment