Today, only a single limestone wall survives, stretching seven metres in length and standing just under a metre high. This lonely fragment, built from roughly coursed rubble, runs north to south with its eastern face still partially intact whilst the western side has been almost entirely robbed of its stone over the centuries, leaving behind a wall that measures 1.27 metres thick at its base but diminishes to just 0.7 metres where the facing stones have disappeared.

Historical records paint a clearer picture of what once stood here. The Civil Survey of 1654;56 notes that by 1640, the castle at ‘Brenshigh’ was already described as demolished, though it remained in the possession of James oge Butler Esquire, identified as an Irish Papist landowner. The first Ordnance Survey map from 1840 shows the castle as a rectangular structure measuring approximately 18 metres east to west and 8 metres north to south, but by the time of the second edition survey in the early 1900s, only the western wall remained standing. Visitors today can still trace the building’s footprint as a shallow depression in the ground, extending eastward from the surviving wall fragment.

The castle appears to have been constructed within or alongside a roughly square enclosure, likely a bawn; a fortified courtyard typical of Irish tower houses and castles that provided protection for livestock and storage during times of conflict. This defensive arrangement, with the castle positioned on the southern side of the enclosure, speaks to the turbulent nature of medieval and early modern Ireland, when even minor landowners required substantial fortifications to protect their holdings. Though much reduced from its former glory, Breansha Castle’s remains offer a tangible connection to County Tipperary’s complex past, when families like the Butlers wielded considerable local influence from fortified strongholds scattered across the Irish landscape.