This square-shaped defensive enclosure measures approximately 36 metres north to south and 38 metres east to west, defined by a low rise of ground just 30 centimetres high. The site’s shallow fosse, or defensive ditch, ranges from one metre wide at its base to three metres at the top, though centuries of agricultural activity have reduced its depth to a mere 40 centimetres. A modern field boundary now cuts through the western side, further obscuring the original medieval layout.

The site’s strategic position becomes clear when considering its medieval neighbours; a ringfort stands 150 metres to the south, whilst a tower house rises 400 metres to the north-northeast and a church sits 430 metres to the east. This cluster of defensive and religious structures suggests Aughnagomaun was once a significant settlement in medieval Tipperary. The moated site itself would have been home to a wealthy Anglo-Norman family, the water-filled ditch and internal bank providing both defence and status in an era when such features marked social distinction.

Archaeological surveys from the 1950s provide crucial evidence of the site’s original form, with sketch plans showing a roughly square enclosure with an enclosing bank along the northern and eastern sides, a scarp to the south, and the fosse visible on all sides except the west where a field boundary had already obliterated it. Today, the fosse remains most visible along the northern and southern edges, whilst the eastern and western sections have been completely levelled by agricultural use. Despite its deteriorated condition, this moated site remains an important reminder of the Anglo-Norman colonisation of Ireland and the defensive homesteads they established across the countryside.