This medieval earthwork forms a near-perfect square, measuring 32 metres north to south and 34 metres east to west. The site's defensive perimeter consists of a substantial earth and stone bank, roughly 2 to 3 metres wide, which stands between 0.5 and 0.8 metres high on the inside but drops a more imposing 1.5 to 2 metres on the exterior face.

Originally, a water-filled fosse, or defensive ditch, would have surrounded the entire enclosure, though today it's only clearly visible along the southwest section. Here, the waterlogged channel spans about 3.5 metres across and reaches depths of 0.35 metres; elsewhere, centuries of silting and infilling have obscured its outline. A gap in the southeastern corner, approximately 3.5 metres wide, likely marks the original entrance to the site.

These moated sites were typically built between the 13th and 14th centuries by Anglo-Norman colonists or prosperous Gaelic families, serving as fortified farmsteads rather than true castles. The raised platform within the enclosure would have supported timber buildings; perhaps a hall, living quarters, and agricultural structures; whilst the surrounding ditch and bank provided both defence and drainage in this marshy terrain. Though now little more than earthen ridges and depressions in a field, this site once stood as a symbol of medieval authority and agricultural prosperity in rural Tipperary.