It is not a dramatic ruin; there are no standing walls, no carved stonework, no towering gable ends. What survives is quieter than that: the grass-covered footings of a small, irregular building, the ground itself retaining the shape of walls that were once thick enough, at 1.2 metres, to suggest solid construction and some degree of permanence.

A rath, sometimes called a ringfort, is one of the most common monument types in the Irish landscape, an enclosed farmstead of the early medieval period, typically defined by one or more circular earthen banks. What makes the Ballincar example of particular interest is the relationship between the enclosure and this building within it. The house does not sit at the edge or to one side; it occupies a raised oval area at the very centre of the rath's interior, a positioning that implies deliberate planning rather than casual placement. The building's internal dimensions, roughly eight metres north to south and 6.7 metres east to west, are modest but not negligible, and a narrow entrance, 1.4 metres wide, faces the northwest. That north-westerly orientation is a detail worth pausing on, running counter to the more commonly observed preference for south or east-facing doorways in early medieval Irish structures.