Trevethan House

Trevethan House is a house that was formerly a farmhouse, built around the mid-19th century. It features dressed slate construction and a rag slate hipped roof coated in bitumen, along with two dressed slate axial stacks. The rear wing has an asbestos slate roof with a gabled end. The overall layout is L-shaped, consisting of three main rooms in the main range, with an entrance hall located between the central room and the left end room. The entrance hall leads to a stairwell situated behind the smaller central room. The kitchen is located in an integral wing behind the right-hand room, which extends as a row of service cottages. There is a cellar beneath the left-hand room of the main range, where the ground level is lower.

The house is two storeys high with an attic. The west front features a symmetrical arrangement of windows in a 1:2:1 pattern, except for the door, which is located in the left of the central bay. It has large pointed arch window openings with dressed slate arches, concrete cills, and mid to late 19th-century pointed arch 8-pane sashes with horns. The doorway to the left of the centre is in a similar opening and has vertically panelled and studded doors with a fanlight, framed by a stopped and chamfered doorframe; the outer doors are from the 20th century. There are two hipped dormers, each with a 16-pane sash, although the sash on the left is a replacement. Similar dormers are found at each hipped end, and there are matching windows in the end walls, one on each floor. The rear elevation includes a pointed arch rear doorway and a window above it. The rear kitchen wing to the left has been significantly altered.

Inside, the interior is quite plain, lacking moulded plaster ceiling cornices. However, the left-hand room and the small central room feature mid-19th-century marble chimneypieces with console brackets. Most of the internal joinery remains intact, including panelled doors and an oak open-well open-string staircase with thick stick balusters and square newels. The hall floor is paved in slate. It is noted that the house was built for someone known as Cobblestone Cross, according to information from the owner.