What remains today is only the eastern half of what was once a formidable tower house, rising three storeys high with walls built from limestone rubble and weathered quoins. The structure likely stood at least one storey taller in its heyday, with vaulted ceilings over both the ground and second floors. The surviving eastern wall stretches about eight metres, accompanied by the eastern end of the northern wall and a stair tower at the southern end, though time and neglect have claimed the western portions of the building.

The architectural details that survive offer fascinating glimpses into medieval defensive design. A narrow loop pierces the eastern wall at ground level, whilst the first floor features a beautiful cusped ogee-headed window with wide internal splays at the northern end. Strategic musket holes and loops dot the walls at various levels, reminders of the tower’s defensive purpose. The original entrance, a pointed doorway with external rebating and punch tooling with drafted margins, has been rather curiously relocated into a rebuilt western wall that dates to around 1907. Near this repositioned entrance lies a covered well, allegedly the tower house’s original water source, though its current position suggests it may partially sit on the original line of the southern wall.

The castle’s more recent history reveals layers of adaptation and change. A labourer’s cottage now huddles against the northern face, its roofline partially obscuring the first floor, whilst another building abuts the eastern wall. The nearby house and farmyard to the west have incorporated fragments of the castle into their own fabric; a flat-headed window with hood-moulding, likely salvaged from the tower house, was inserted into the house during the late nineteenth or early twentieth century. According to the Civil Survey of 1654-6, the castle once had a bawn and belonged to James Archer of Archerstown Esquire, listed as an Irish Papist proprietor. Today, possible keying stones for this long-vanished bawn wall still project from the eastern face of the tower house, silent witnesses to the castle’s more extensive past.