This small rectangular tower, measuring roughly 5.35 metres by 6.4 metres, rises three storeys from its limestone rubble walls. Built with the characteristic base batter that helped deflect projectiles and strengthen the structure, the tower’s walls are a substantial 1.1 metres thick. Though time hasn’t been entirely kind to it; the northeast wall shows significant damage, and various outhouses have been attached to both the northeast and southwest faces over the centuries.

The tower’s main entrance showcases the skilled stonework typical of the period, featuring a two-centred pointed doorway set into the southwest wall. The doorway’s chamfered jambs display punch-dressed surfaces with drafted margins, a style that mirrors the craftsmanship found at nearby Ballycowan and Srah castles. Inside, the tower follows a simple yet practical design with a single chamber on each floor, supported by wooden beams. Evidence of square holes in the southwest wall suggests an internal wooden staircase once connected these levels, allowing defenders and residents to move between floors.

What makes Ballybritt particularly interesting is the remnant of its defensive bawn wall system, evidenced by a surviving flanking turret located 25 metres north of the main tower. This semi-circular turret, of which only the southeastern half remains at 4.2 metres in diameter, would have been part of a larger defensive perimeter with corner towers; a typical arrangement for protecting livestock and providing an outer line of defence. Though most of the bawn has vanished, these surviving elements paint a picture of a once-complete fortified homestead that served both residential and defensive purposes during Ireland’s turbulent medieval period.