Located in the lowlands beside a river, this former tower house dominated the landscape for generations. According to local memory, the castle remained inhabited until around 1750, making it one of the longer-lived fortifications in the area. Its final years as a standing structure ended dramatically; one substantial wall survived until roughly 1935, when concerns about public safety led to its deliberate demolition by explosives.

The Office of Public Works documented the site in 1958, confirming its identity as a castle and noting the remnants of what appeared to be a tower house. Recent land project works have uncovered sections of cobbling, likely the original courtyard surface where daily life once unfolded. These archaeological traces, though modest, help piece together the castle's footprint and suggest the bustle of activity that would have characterised a working Irish stronghold.

Today, visitors to Killeany will find only weathered stone fragments in a riverside field, requiring imagination to conjure the fortress that once stood here. The site's inclusion in the Archaeological Inventory of County Laois ensures its story remains part of Ireland's documented heritage, even as nature gradually reclaims what little remains of the physical structure.