Lower Tregantle Farmhouse

Lower Tregantle Farmhouse is a farmhouse dating from the early 17th century, with an additional inner room likely added in the mid 17th century. Later alterations occurred in the late 19th and 20th centuries. The farmhouse is constructed of granite, with coursed squared rubble to the front, an ashlar front lateral stack, rendered side walls, and a random rubble rear. It has a slate roof with ridge coping tiles and gable ends, including a gable end stack to the right and a front lateral stack to the hall/kitchen.

Originally, the farmhouse comprised two rooms with a cross passage, a hall/kitchen to the right heated by a front lateral stack, and an unheated dairy to the left. In the mid 17th century, an inner room was added, heated by a gable end stack and featuring a circular stair tower to the rear left. In the late 19th century, the roof was raised over the inner room, and a straight stair was inserted into the passage, which is unusually wide. The stair tower was subsequently closed off and reopened in the 20th century.

The farmhouse is two storeys high. The passage has a 20th-century porch with a panelled door and a 20th-century window to the ground floor left (dairy), and a four-pane sash and a 20th-century light at the first floor. The front has an external granite ashlar stack on a plinth, which is weathered and stepped with a cornice and a tapered top; the hall also has a moulded plinth. A 20th-century window is located at ground and first floor to the right of the stack, with the ground floor window having convex moulded jambs. The inner room is stepped back to the right and has 20th-century windows at both ground and first floor. A plinth is present on the outer side of the inner room, which is not continuous with the hall plinth. The roof level was raised with rebuilding under the eaves to the front and rear of the inner room. The left side is rendered, and the right side has a stack with a cornice and a tapered top, also rendered. At the rear, a straight joint separates the hall and inner room, with quoins at the upper level on the hall side. A slate string course at first floor level may indicate the line of the roof raising. A circular stair tower is located to the end left, and there is a two-light casement to the rear of the hall with a granite lintel. A six-pane light is located to the rear of the passage. The rear of the dairy has a chamfered ventilation slit, and there is a 16-pane sash under the eaves.

The interior features a straight stair inserted into the passage. The dairy has a granite floor and slate shelves. The hall/kitchen fireplace is closed. A solid wall separates the hall and inner room. The inner room has a gable end fireplace with a flat, chamfered granite lintel. A granite newel stair is within the stair tower. The roof is not accessible.