A sub-circular slate-walled building of roughly 4m x 4m diameter The walls survive to a height of 1m but thickness is indeterminable due to the exterior surfaces having been built into the bank. The doorway is located on the south side, measuring 0.6m across and 0.7m tall, and still has its lintel. There is a possible storage recess built into the east wall which measures 40cm wide by 20cm tall and 30cm deep. Noted during an upland survey conducted by Archaeophysica during 2005-6