The castle’s history stretches back to at least the 14th century, when the manor was held by the de Londres family of Rosegarland as part of the larger Devereux fief of Adamstown. By the 1600s, ownership had passed to the Browne family of Mulrankin, though their tenure would prove tumultuous; by 1641, William Browne possessed 800 acres and what was already described as a ruined castle in the Civil Survey of 1654-6.

Today, visitors to the site will find only fragments of the original structure, though these remnants offer tantalising glimpses of its former defensive capabilities. The northeast wall, stretching 10 metres long and rising approximately 6 metres high, remains the most substantial survivor. Its pointed doorway still shows evidence of a yett, a hinged iron gate that would have provided an additional layer of security. Just inside, the entrance lobby retains its murder hole; a sinister opening through which defenders could attack intruders trapped below, alongside access to a mural staircase built within the southeast wall.

Archaeological examination reveals further defensive and domestic features throughout the ruins. Portions of the northwest to southeast barrel vault remain visible, whilst double splayed window openings, designed to maximise light whilst minimising vulnerability to attack, can be found at both ground and first floor levels in the northeast wall. Though the interior is now filled with cairn material and the southwest wall opening has been destroyed, these architectural details speak to a structure that balanced the needs of daily life with the harsh realities of medieval warfare in Ireland.