A rath, for those unfamiliar with the term, is a circular earthen enclosure, typically dating to the early medieval period in Ireland, often interpreted as a defended farmstead. Most of what survives above ground at such sites is the enclosing bank and ditch. Here, though, something else remains inside.

In the north-western quadrant of the enclosure at Killoe sits a low stony mound, roughly eight metres in overall diameter, that may represent the collapsed walls of a hut once standing within the rath. A possible entrance faces east, which would be consistent with early medieval building practices in Ireland, where doorways frequently opened toward the morning light. The structure is catalogued as a companion feature to the broader rath complex, and its interpretation as a hut site rests on the shape and composition of the mound rather than any excavated evidence. A. O'Sullivan and J. Sheehan, who surveyed the archaeology of the Iveragh Peninsula for Cork University Press in 1996, recorded this feature among hundreds of monuments across south Kerry, a region whose comparative remoteness helped preserve a remarkable density of early settlement remains.