The structure is modest even by the standards of early Irish settlement: roughly 7.5 metres long and just 2.3 metres wide, with what appears to be a narrow entrance, only 0.7 metres across, set into its northern side. It is the kind of trace that is easy to walk past without registering what it is, a slight thickening of the ground where a wall once stood, meaningful mainly in relation to the larger enclosure that contains it.

The building sits in the southern half of a cashel, a type of stone-walled circular or oval enclosure used in early medieval Ireland, typically for farmsteads or occasionally ecclesiastical settlements. The cashel at Ballyhenry is a separate recorded monument in its own right, and the house site occupies the interior, pressed up against the enclosure's southern wall in a position that would have offered some shelter. Lavelle, writing in 1994, described it as a possible house site, and that note of caution is worth keeping. The dimensions are real enough, but without excavation the function and date of the structure remain uncertain. When a building is described as being of indeterminate date, it often means the archaeology is legible enough to identify a feature but not enough to place it confidently within any particular century or cultural phase.