Stone barn and hexagonal roundhouse converted to a four bed dwelling. A roundhouse (or horse engine) was a building attached to the main threshing barn. Horses were used from the late 18th century to drive the machinery used to thresh corn by means of walking around in a circle (hence the form/name roundhouse). The project was designed to retain the look and feel of a traditional stone barn in both its external appearance and plan form. New apertures were kept to a minimum, and the existing openings were kept deliberately simple in their detailing. The first floor plan of the original barn is uninterrupted with no internal partitions. The full-height rooms rise to over 4.7 meters at the apex and the glazed gables fill the space with light. Similarly, the bedrooms in the lower areas are double height spaces with near full height glazing overlooking the garden area to the West. Situated on the North coast of Cornwall, the project used local stone to restore and rebuild the barns. A new pitched roof structure, built in oak was returned to the main barn and roundhouse. The later concrete block addition was re-worked in oak and stone with a sedum covering to the roof area. The house is serviced by a ground-source heat pump system that includes solar PV input.