The first military buildings constructed by the British Army in the former Pembroke Cantonments were St George's Barracks. The military buildings that survive include the former Guard Room, which has a distinctive protruding multi-arched veranda and still contains the former cells, rehabilitation yard, as well as the marble plaque commemorating the inauguration of the barracks in 1860.

There are also four large soldiers' accommodations having long verandas on the southern façades to provide shade at both the ground and first floors. Two of these are now used as housing, two others are used as the Institute of Tourism Studies. At roof level of the ITS buildings are displayed the Victorian Royal Arms of United Kingdom and those of Lieut.-General Sir John Gaspard LeMarchant (1803-1874), governor of Malta, from 1858 to 1864, sculpted in franka stone. Mepa scheduled these five properties in 1996 as Grade 2 buildings of historic, architectural and contextual value as they form part of a larger already-scheduled military complex and were republished following a revision as per Government Notice numbers 873/09 and 880/09 in the Government Gazette dated October 30, 2009.