This rectangular tower house, measuring roughly 7.2 metres east to west and 6.4 metres north to south, dates from an era when such fortified dwellings dotted the Irish landscape. Interestingly, the castle doesn't appear on the 1655 Down Survey map of Farbill Barony, though by the time of the 1913 Ordnance Survey, it was already recorded as partially ruined with its north wall missing.

Today, visitors who venture to this overlooked site will find three walls still standing, though in varying states of preservation. The eastern and southern walls remain the most intact, reaching heights of 2.5 to 3.5 metres, whilst the western wall stands somewhat lower at 1.5 to 2 metres, its facing stones largely stripped away over the centuries. The northern wall has completely collapsed, leaving only grass-covered footings and a scatter of rubble. A single, roughly cut rectangular window opening in the south wall represents the only surviving architectural detail, as the interior is now choked with fallen masonry.

Located just 380 metres southwest of Corbally Church and its accompanying graveyard, Edmondstown Castle occupies a quiet corner of the Westmeath countryside. Though it lacks the grandeur of better-preserved castles elsewhere in Ireland, these weathered walls offer a tangible connection to the medieval and early modern periods when such tower houses served as both homes and defensive strongholds for the local gentry.