Old Trecastle Farmhouse

This is an early 16th-century crosswing with a lower range added in the early 17th century, forming a T-shaped plan farmhouse. The building is constructed of whitewashed rubble stone with slate roofs and brick stacks. The lower range is single-storey with an attic containing dormers, and has a catslide roof to the rear. The larger crosswing is two storeys high and has end stacks, with a projecting latrine chute to the east gable end.

The east front of the lower range features a red brick ridge stack slightly right of centre, two stone dormers on the left, casement pairs with timber lintels, and a Tudor-arched entrance within a rectangular oak frame, accompanied by a cambered-headed casement pair. A blocked light is positioned further right, in line with the chimney, and another casement pair with a timber lintel sits on the extreme right. The north gable end has three-light timber diamond-mullion windows serving the loft.

The crosswing's north return has a ground floor casement pair and a first-floor triple casement under the eaves. The east gable end is largely windowless except for a small stair-light centrally to the right and a smaller light in the attic above. To the left is a projecting, slate-roofed latrine. The south front has been altered in the 19th and 20th centuries and features three casement pairs under the eaves, a tiny stair light under the eaves to the right, a large ground-floor triple casement with a timber lintel on the left, and a 9-pane window combined with a 6-6-pane casement pair under a single timber lintel, separated by a brick pier. The sills are stone tile in the 20th century. There are two 20th-century rooflights. The west gable has two small ground-floor windows.

The crosswing contains two rooms on the ground floor – a hall to the east and a parlour to the west. Tudor-arched plank doors provide access from the added north extension and to a post-and-panel screen separating the hall and parlour, with more ornate moulding on the hall face. The hall features elaborately moulded and stopped spine beams resting on wooden window lintels, along with moulded joists; the parlour has a 17th-century elliptical-panel plaster ceiling decorated with Tudor roses, leaf trails, and pomegranates. Both rooms have stone fireplaces with chamfered wooden lintels, and stair access is provided by plank and batten doors with strap hinges. A winding wooden baulk stair leads to the first floor, with chamfered four-centered door heads and jambs to the landing. A more ornate, early 17th-century carved, shaped door head signifies the first-floor post-and-panel partition. Moulded beams with shallow camber are present. A winding stair ascends from the eastern bedroom to the loft, accessed by a planked door with strap hinges.