Today, only the northwest corner of this poorly preserved tower house still stands, its walls built from roughly coursed limestone rubble with a distinctive base batter that slopes outward for stability. The medieval structure sits rather incongruously within a grove of trees planted during the nineteenth century, with a modern water tower rising to its east.

The castle has suffered considerable damage over the centuries, with a quarry operation immediately to the north likely contributing to its deterioration. Historical records from the Ordnance Survey Letters of 1930 mention architectural details that have since vanished; O’Flanagan described a mullioned and transomed window at the eastern end of the north wall, with another window directly beneath it, though neither feature remains visible today. These lost elements would have been typical of late medieval Irish tower houses, which often featured such decorative stonework around their defensive openings.

What survives at Tullahedy represents just a fragment of what would have been a substantial defensive residence, likely built by a local Gaelic or Anglo-Norman family during the late medieval period. Tower houses like this one were the preferred dwelling of the minor gentry throughout Ireland from roughly 1400 to 1650, combining domestic comfort with defensive capabilities in an often turbulent political landscape. Despite its ruinous state, the castle’s commanding position on its rocky perch still hints at its former strategic importance in controlling the surrounding territory.