A farmhouse dating from the mid 17th century which underwent alterations in the mid 19th and 20th centuries. It was constructed of red brick and has hipped slate roofs with two 19th century ridge brick stacks (originally a single axial stack). For the full description and the legal address of this listed building please refer to the appropriate List of Buildings of Special Architectural or Historic Interest. {1} Manor Farm (Slate House Farm), Addlethorpe. Partially extant 17th century farmstead. Regular courtyard with multiple regular yards. The farmhouse is detached from the main working complex. There has been a partial loss (less than 50%) of traditional buildings. Isolated location. Large modern sheds are located to the side of the site. {2}