Cowhouse with hayloft approximately 15 metres to north-west of Alderthwaite Farmhouse

This is a cowhouse with a hayloft, built in the early 18th century, located approximately 15 metres northwest of Alderthwaite Farmhouse. The building is constructed from thinly-coursed sandstone, with a roof primarily made of Welsh slate, featuring stone slate eaves courses.

The cowhouse is two stories high and has three bays, with large quoins at the corners. The entrance front, which faces the farmyard, has a gabled design. On the ground floor, there is a doorway to the left with a deep stone lintel, and a first-floor doorway with a timber lintel that is accessed by external stone steps on the right. The first floor also features a two-light casement window with a timber lintel, and above it, in the gable, there is another casement window with a projecting ledge. The side walls include ventilation slits, and the left wall has a square pitching opening to the first floor.

Inside, the cowhouse retains 18th-century floor beams and two principal rafter trusses with cambered tie beams. The cowhouse is noted for its group value with the nearby late medieval barn, which was encased in stonework in the late 17th or early 18th century, likely around the same time the cowhouse was built.