What remains today are the outlines of rectangular buildings set within a larger rectangular enclosure, measuring 43 metres north to south and 64 metres east to west. The ruins are difficult to interpret due to their deteriorated state, with only the basic footprint of the structures visible beneath the sod.

Historical records show that the castle was owned by Walter MacFiegh in 1574, placing it firmly within the turbulent period of Tudor Ireland when Gaelic lords still held considerable power in the western counties. The rectangular layout suggests a typical Irish tower house complex of the period, likely consisting of a main residential tower with associated outbuildings for livestock, storage and servants’ quarters, all protected within the outer defensive walls.

These remnants were documented as part of an archaeological survey of the Ballinrobe district in 1994, which catalogued numerous historical sites around Lough Mask and Lough Carra. Though little more than earthworks today, Liskilleen Castle represents one of countless fortified homes that once dotted the Mayo countryside, built by local families seeking security and status in an era when both were hard won.