The top of the old castle mound was the main focus of last summer's archaeological work. Although much of the castle's stone had been removed in the past, a sequence of structures was revealed (see Phase Plan).

Building appears to have begun with a two-storied block with an external stair, in the eastern corner of the mound. A stone curtain wall was subsequently added, and then further internal buildings. Corner towers were then added, perhaps in response to structural movement, as the later structures had no proper foundations. There was also evidence of activity on the mound after the castle had been dismantled, in the form of an oven and waste materials from smithing activity.