Grade II listed building. Main construction periods 1795 to 1966 Three-storey, brick building of 1795. Part of South Barracks, Building No.12.Building 12 (Officers' Mess), South Barracks. Royal Marines School of Music. The earliest part of the building dates from 1795 when the barracks were first established and was probably used as an Officers Mess - its present function. A kitchen was added to the rear in the mid 19th century and two porches to the front during the same period. The main range was extended at both ends in the mid 20th century. Three-storey building, thirteen bays in length, built of brown brick laid in Flemish bond. The building was designed by J Johnson and J Sanders, Barrack Department architects. The 18th century range is one of only two officers quarters that survives from the first English army barrack-building campaign of the 1790s. Part of South Barracks.