The castle once stood in open pasture that slopes gently towards the Glennyrea River, which flows about 60 metres below. Though the castle itself has long since vanished, historical records paint a picture of what was once a significant manorial estate in this quiet corner of South Tipperary.

The Civil Survey of 1654-6 provides valuable insights into what existed here during the mid-17th century, describing 'a castle and some thatcht houses with a Bawne about them'. A bawn was essentially a fortified courtyard wall that surrounded and protected the main buildings; a common defensive feature of plantation castles throughout Ireland. The survey also notes that Rehill was a proper manor, complete with its own Court-leet and Court-Baron, indicating it held considerable legal and administrative importance in the local area.

By the time the Ordnance Survey mapped the area in 1840, only traces remained. Their cartographers marked out a roughly square area measuring about 31 by 33 metres with dashed lines, likely indicating where the bawn once stood. The 1904-05 edition shows a 23-metre length of scarp running north to south, west of the castle site, but even this final remnant has since disappeared. Today, visitors to the ridge will find only pasture where this fortified manor once administered justice and sheltered its inhabitants behind protective walls.