Symmetrical administrative outbuildings are designed to discharge Concert Hall technological process and place its additional staff utilities. The Northern outbuilding is supposed to place additional make-up rooms. In the Southern outbuilding rehearsal halls, offices, staff café and souvenir shop are suggested. Both 6-storey outbuildings are connected with the main building of Concert Hall with cantilevered galleries at the 3-nd floor. The projects were examined by a state construction expertise.