It is almost all that remains of a small square building, its interior once measuring around three metres by three metres, now reduced to that one surviving face of masonry and a rubble scatter lying about fifteen metres south-east of a nearby church. It is the kind of remnant that could pass entirely unnoticed, easily mistaken for field clearance or a collapsed outbuilding, yet it marks a distinct structure in its own right.

The relationship between this building and the adjacent church suggests some form of associated use, whether ecclesiastical, domestic, or functional. Small ancillary structures of this kind were common accompaniments to rural churches across Ireland, serving as sacristies, shelters, or storage. Without further excavation or documentary evidence, the precise purpose of the Rosclogher building remains open. What can be said is that its location close to the lough shore places it within a landscape that has been settled and worked for centuries, the low-lying ground between Lough Melvin and the surrounding drumlin countryside forming one of the more accessible corridors in this part of south Leitrim.