Pressed against the interior of the ringfort's southern and south-south-western bank, the stone foundations of two rectangular house sites survive, joined to one another by a short, steep scarp running roughly north to south. A ringfort, for context, is a roughly circular enclosure defined by an earthen bank and ditch, common across early medieval Ireland and typically associated with a single farming family and their dependants.

What makes the arrangement at Adamstown quietly interesting is its internal organisation. A low, narrow bank of earth and stone runs northward from the paired houses to connect with a third, single house site at the northern end of the enclosure's interior. This creates a kind of informal spine within the ringfort, linking three separate structures across the enclosed space. The two southern houses sharing a scarp boundary suggest they may have served related but distinct purposes, perhaps separating sleeping quarters from storage, or accommodating different members of a household. The date of these structures remains unresolved, which is itself a common situation with ringfort interiors, where surface remains can belong to the original occupation or to much later reuse of a convenient, already-bounded space.