The land rises to the east of the tower house and across the river to the west, creating a landscape of rock outcrops and pasture. The castle itself is a limestone rubble tower house, roughly coursed and probably once at least four storeys high, though today it survives only to first floor level with its vault still intact. The structure measures 7.87 metres north to south and 5.64 metres east to west internally, with walls 2.3 metres thick. One of its more distinctive features, noted in the OS Letters from 1930, is the rounded corners at the northeast and northwest angles, giving the building an unusual curved profile rather than the typical sharp edges found in most tower houses.

The original entrance was through a doorway in the south wall, though this has since collapsed along with much of the external southern face, leaving considerable rubble within the interior. What remains suggests a sophisticated defensive layout; there was likely an entrance lobby with a spiral staircase in the southeast angle, and possibly a guardroom to the west of the entrance, evidenced by a surviving wall cupboard. The ground floor chamber was lit by three windows, one each in the north, east and west walls, though only the east loop survives intact as a flat-headed opening with an external chamfer. Three wall cupboards are built into the main chamber; two at either end of the west wall and one at the east end of the north wall. The first floor, which was supported on a wooden floor resting on corbels on the east and west walls, was lit by a single loop in the north wall.

The 1840 Ordnance Survey map shows lime kilns immediately south of the tower house and adjacent to the west wall, as well as a small building projecting eastward from the south end of the east wall. A trackway once ran past the south side of the tower house leading to a quarry 160 metres to the south-southeast. The OS Letters describe an intriguing feature on the east wall; an opening twelve to fourteen feet above ground that gave access to a flight of stairs ascending within the centre of the wall in a northward direction. At the time of that survey, a thatched cabin or shed had been built against the wall where stone steps probably once led up to this opening. Today, heavy ivy growth obscures much of the exterior, including these features and a garderobe mentioned in the 1943 I.T.A. Survey, making it difficult to verify many of the historical architectural details.