What survives is an oblong cairn, roughly 8.5 metres long and 2.5 metres wide, with a shallow depression running along it and a partial gallery at its western end. That gallery, a roofed stone passage typical of megalithic tomb construction, is now reduced to three upright stones called orthostats, a prostrate slab along the southern side, and a single standing stone to the west. The whole structure abuts an old fence line, giving it the slightly incongruous appearance of something that has simply been there long enough to become part of the field boundary.

The more particular damage dates to 1872, when a party of soldiers dug into the monument and removed what was recorded as a covering slab. This incident was documented by Cremen in 1924, preserving at least the fact of the interference even if the slab itself is long gone. The removal of a capstone or covering slab from a megalithic gallery is a significant loss: such stones were often the largest and most carefully placed elements of the structure, spanning the chamber below and completing the monument's form. What remains at Ballymacus Point is therefore not simply a ruin in the usual sense of gradual decay, but a site that was actively disturbed at a known moment in time, leaving the orthostats standing without the roof that once connected them. The cairn material around them, and the depression that runs through it, suggest the original monument was considerably more substantial than what the eye now takes in.