Towards the top edge of the north facing slope a well-defined complex of features were identified as a timber post structure. Eight substantial postholes formed two parallel lines down the middle of the building, representing the position of the main aisle posts that would have supported the roof. The walls were defined by smaller postholes, the whole building measuring c.12m by 7m externally. Traces of slots to support partitions had survived and linear hollows just inside each gable end suggest further complications to the interior of the structure.
Small sherds of early Neolithic pottery were recovered from several of the postholes along with occasional pieces of flint, including a broken portion of a finely worked arrowhead. The pottery associated with the house is 'Irish Sea ware' dating to the Early Neolithic (c. 4500-3900 BC). This same pottery was found associated with the Early Neolithic house on the old Llandygai Industrial Estate site and the present structure closely resembles that house. Only one other site in Wales has produced good structural evidence from the Early Neolithic period. Llandygai now has the 'two best examples in Wales' of these rare houses.