The 15th-century castle is rectangular in shape, across, similar in design to Farleigh Hungerford Castle in Somerset or Baconsthorpe Castle in Norfolk. Although incomplete, the surviving elements and the foundations show that it was designed with a square tower on each corner, with less substantial side towers on the north-east, south-east and south-west edges, and a large gatehouse on the north-western side. An inner range of buildings, deep, ran around the inside of the curtain wall, set back slightly from the wall itself and forming a central courtyard. The towers projected into the water-filled moat which surrounded the castle.