The walls survive only one or two courses high, built in the double-faced style typical of early Irish stone construction, where two parallel faces of large blocks are set against each other to form a single wall. The structure measures roughly ten metres from east to west and four metres from north to south, modest even by the standards of early medieval domestic buildings. What makes it quietly puzzling is what lies beneath its western end: a souterrain, an artificial underground passage or chamber, typically cut into the earth or built from stone and roofed over, used in early medieval Ireland for storage or concealment. The house was built either without knowledge of the souterrain below, or in deliberate relationship with it.

The house sits within the interior of a cashel, a type of stone-walled enclosure that served as a farmstead or settlement boundary in early medieval Ireland, positioned just west of the enclosure's centre. The site at Lisheeneenaun, County Galway, was noted by McCaffrey in 1952, and the overlapping relationship between the house and the souterrain was recorded at that time. Whether the house postdates the souterrain or whether both belong to the same period of occupation remains unclear, which is in part why the house carries no firm date. The cashel itself and the souterrain are recorded as separate features, and the house occupies the uncertain ground between them, literally and archaeologically.