The castle once stood as a rectangular building measuring approximately 12 metres in length and 6 metres in width, enclosed within a distinctive D-shaped boundary. First recorded on the original Ordnance Survey six-inch map of the area, this medieval structure has since vanished entirely from the landscape, leaving no visible traces above ground.

The castle’s strategic placement on the sloping terrain would have provided its inhabitants with commanding views across the surrounding countryside, a common defensive consideration in medieval Irish castle construction. Its modest dimensions suggest it may have been a tower house or fortified dwelling typical of the late medieval period in Galway, when local lords built such structures to control and protect their territories.

Archaeological records indicate that Lisnamoltaun Castle didn’t stand alone in this landscape; approximately 90 metres to the southeast, the remains of a ringfort can still be observed. This proximity to an earlier fortification suggests a continuity of settlement in the area, with successive generations recognising the defensive advantages of this particular location. Though the castle itself has been lost to time, its documented presence adds another layer to the complex tapestry of Galway’s medieval heritage.