Subdivision of single dwellinghouse into two dwellinghouses; associated private amenity spaces (following demolition of outbuilding in rear garden); alterations to roof involving hip-to-gable enlargement to side roofslope and extension to rear of main roofslope, and installation of four rooflights to front roofslope; front extension to form front porch; alterations to front and rear elevations involving replacing window and door openings, and installation of two front canopies (following demolition of existing canopy and porch); and alterations to forecourt involving formation of a vehicle crossover, additional vehicle parking space, breaks in boundary treatment, and installation of plantings.