It measures roughly 10.7 metres long and 5 metres wide, oriented on a northeast to southwest axis, and what survives above ground amounts to little more than a raised stony ridge, no more than 0.4 metres high on the interior and slightly less on the exterior. The northeast side has vanished entirely from the surface, and only traces of the southeast side remain. It is the kind of feature that rewards a careful eye rather than a casual glance.

The structure sits approximately 10.4 metres south of a separate enclosure, and a second similar structure lies to the west of that same enclosure. Whether any of these features belong to the same phase of activity is genuinely uncertain. The rectangular building may be later in date than the enclosure nearby, though the relationship between them has not been resolved. That ambiguity is itself revealing: the Galway landscape holds layer upon layer of past activity, and features like this one, too regular to be natural and too eroded to be easily read, often resist straightforward interpretation. Rectangular structures of this kind could represent anything from a small agricultural outbuilding to a later field enclosure, and without excavation the question stays open.