Lower Tregantle House

Lower Tregantle House is a farmhouse, now a house, dating from around 1800 with some later alterations. It is constructed of mixed slatestone and sandstone coursed rubble with stone dressings on the front and random rubble on the sides and rear. The roof is steel hipped with a wooden eaves cornice and rendered end stacks with caps. The building has a double depth plan featuring two principal front rooms and a smaller room to the rear right. There is a central entrance hall that leads to a stair hall at the rear left, behind which is a two-storey service wing.

The house is two storeys high and has three windows, all of which are 12-pane sashes with slightly cambered flat arches. The central flat-roofed porch has a half-glazed door, with rubble pilasters on the sides and a cornice above, leading to an inner four-panelled door. The main facade features pilasters and a band course under the eaves. The right side of the house has a 19th-century window at ground floor and a 20th-century window at first floor, both with stone cambered heads. The left side has an 8-pane light with a toplight at ground floor, which lights the dairy, and a first-floor 20th-century window, also with a cambered stone head.

At the rear, there is a two-storey service wing to the right with a half-glazed door in a porch that has a pitched roof, along with a single-storey lean-to to the right. The rear of the main house features a 19th-century two-light window at ground floor and two 20th-century windows at first floor. Inside, the stair hall at the rear left of the passage has a dog-leg stair with stick balusters, column newels, and a moulded handrail. The principal rooms on the ground floor have four-panelled doors with panelled cheeks and soffits. The kitchen in the rear service wing has a granite fireplace with a chamfered and cambered head.