The castle’s dimensions, recorded in meticulous detail during the 19th century, reveal a structure of considerable proportions; its interior measured 24 feet by 19 feet 6 inches, with walls nearly six feet thick and rising to 25 feet in height, though they once reached even higher. The ground floor featured a surviving arch as late as 1840, whilst the upper levels contained practical defensive features including a murder hole that once protected the entrance below. Archaeological surveys have identified this as a Type 2 tower house, distinguished by its side tower or turret, with a wing projecting from the east end of the south wall that housed a second storey latrine accessed via stairs built into the walls themselves.

The castle’s history weaves through centuries of Irish political upheaval and changing ownership. The Hubert family held the castle in the late 16th century, with Edmund Hubert receiving a pardon in 1582, though his kinsman Gerald would later join the ill-fated Desmond Rebellion. By 1611, ownership had passed to Oliver Stephenson, whose family maintained their connection to Ballyvoghan for over a century; Thomas Stephenson died there in 1633, and the family still held lands in the area as late as 1736 when Robert Morgan leased property to Richard Stephenson. The castle’s name itself tells a story of linguistic evolution, known locally as Baile Uí Bhuacháin in 1840, possibly connecting to the ancient Eoghanacht name Buadhachan, though earlier forms suggest links to the Vaughan family who were prominent in nearby Kilbradran in the early 17th century.

Today, what remains of Ballyvoghan Castle offers tangible evidence of medieval Irish defensive architecture. The surviving vault over the second storey and the remnants of the mural room in the southwest corner speak to both the military purpose and domestic arrangements of these fortified residences. Though time has claimed the upper portions of the structure, the castle’s substantial foundations and lower walls continue to mark the Limerick landscape, a testament to the turbulent centuries when such fortifications were essential to survival in rural Ireland.