extension to the rear over 5 floors (including first to fifth floor) providing 3 additional bedrooms at each level (15 in total) to bring the total number of bedrooms in the premises to 89 rooms, together with provision of an additional set back penthouse storey at 6th floor to accommodate a new roof top bar at The Mont Clare Hotel, 1-4 Merrion Street Lower, 13-14 Clare Street, and Merrion Close, Dublin 2, D02 H525