Great Treverbyn Farmhouse

The farmhouse at Great Treverbyn dates to the late 17th century and was re-orientated and extended in 1870, with few later alterations. It is constructed of slatestone and granite rubble with slate roofs, ridge tiles, gable ends, and gable stacks to the 19th-century range. The original plan comprised two rooms, possibly part of a larger house, with a heated room to the right and an unheated dairy to the left; a stair tower is positioned to the rear of the heated room. In 1870, a two-room range was added to the right, at a right angle, forming a new front. This front is symmetrical with three windows, all three-light casements except for a first-floor, two-light casement. Slate sills and a slate string course are visible. A central door is surmounted by an overlight and slate hood, and a datestone is set at first floor level. A single-story rubble lean-to is present on the right side, along with a first-floor 19th-century mullion and transom window. The left side features an external stack and a four-pane casement at ground floor, with a two-light casement above. The original 17th-century range has a two-light casement at ground floor, a three-light casement at first floor, and a two-light casement to the dairy to the left. The gable end of the dairy has a two-light casement and slate ventilators. The rear has a two-story gabled stair tower with a two-light casement at first floor and slate hanging. A single-story addition with a hipped roof and a door is attached to the base of the stair tower. A lean-to corridor with a sixteen-pane sash window leads from the 19th-century range to a single-story dairy/scullery that forms a narrow rear courtyard, featuring two sixteen-pane sashes in the gable end with slate ventilators and two sashes on the outer side. Inside the original range’s heated room is a slate floor and a fireplace with a flat granite lintel, which is chamfered with run-out stops; a cast iron door is visible on the rear-right side of an oven. The stair tower contains a winder stair, and the unheated dairy incorporates a well with a drain. The 19th-century range also has slate floors.