The Civil Survey of 1654-6 recorded it as "a castle inhabited yet wanting repair", suggesting that whilst still occupied, the structure was already showing signs of decline during the tumultuous years following Cromwell's campaign in Ireland.

The lands at Barnane were divided amongst a complex web of local landowners, reflecting the intricate nature of land ownership in 17th century Ireland. The proprietors included Sir John Morres of Knockagh, Nicholas Morres of Ballymcrier, and various members of the Magher family; William McEdmond, Donogh oge, Phillipp, Edmond, and William McShane; alongside Theobald Butler of Killoskehane. All were noted as "Irish Papists" in the survey, a designation that would have significant implications for their land holdings following the Cromwellian settlement.

By the 19th century, the original castle had been incorporated into a castellated house, with what Bence-Jones described as a "keep-like tower" at one end, likely the last remnant of the medieval structure. Unfortunately, nothing survives of either the castle or the later house today; the entire complex has been completely demolished and replaced with slatted agricultural sheds. The site serves as a poignant reminder of how Ireland's built heritage has been lost over the centuries, with only documentary evidence remaining to tell the story of this once-significant stronghold.