The following buildings on the James Fletcher Hospital site show technical innovation in construction methods: the Military Barracks (surviving original timber roof structure, lining boards and original masonry elements, verandah and columns), the surviving original fabric of the former Officer?s Quarters, the surviving original fabric of the former Guard House, the surviving original fabric of the former military outbuildings and underground brick water tanks, the former Military Hospital (surviving timber shingle roof and other masonry elements, original and early timber joinery).