Single storey rear extension measuring 4 metres (deep) x 3.8 metres (wide) x 2.8 metres (high excluding roof lantern) increasing to 3.45 metres (high including roof lantern); and single storey rear 'bay window' extension measuring 1.2 metres (deep) x 2.95 metres (wide) x 2.5 metres (high to eaves) increasing to 3.65 metres (high to ridge)