A small rectangular building measuring 7m by 3m with a porch area on its western side that is still roofed with slate blocks. Fallen slates inside the building suggest that the main structure was originally roofed in the same way. The drystone walls stand to between 1m and 1.8m in height and are 40cm thick in coursed dressed slate. Noted during an upland survey conducted by Archaeophysica during 2005-6