The majority of the features identified on site related to the Middle (400-40 cal BC) and Late Iron Age (1st to 4th century AD). In both of these periods there was a substantial rural settlement composed of roundhouses and associated features. The dating evidence suggests that there was a pause or shift in settlement location away from Craggan as the Middle Iron Age settlement declined before the area was resettled in the Late Iron Age with new structures being built near what would have been the ruins of the Middle Iron Age settlement.