Great Marlborough

Great Marlborough is a substantial farmhouse built in the late 17th century, designed in an L-plan with a projecting rear wing at the southwest end. The building is constructed of red sandstone rubble with dressed quoins and features a hipped slate roof. It has stone chimneys, including a lateral stack at the back of the main house and a ridge stack on the wing.

The symmetrical, two-storey front faces northeast and includes five window openings on the first floor, which have flat heads, stone voussoirs, and thin stone sills. The 20th-century two-light transom windows feature 1+1 fixed panes above the transom and 2+2 pane windows below. The central entrance doorway on the ground floor is adorned with 17th-century dentil decoration on the door-head and jambs, and it contains a 20th-century six-panel door. Above the entrance is a 20th-century flat door canopy supported by angle struts. Flanking the entrance are two similar transoms on each side, which also have flat window heads with segmental relieving arches above. The southeast gable on the first floor showcases an important surviving late 17th-century tall two-light mullion and transom window with similar dentil decoration.

Attached to the northwest end of the farmhouse is a two-storey gabled porch. The side wall of the porch features a Tudor arched wooden doorframe with roll moulding on the head and jambs, along with a five-pane rectangular overlight. The gable end of the porch has a two-light transom window on the first floor and a doorway below with a monolithic stone lintel and keel-moulded jambs. To the right of the porch is a 20th-century single-storey gabled addition. The rear elevation shows the end wall of the wing to the left and the back wall of the house to the right. In the angle of the wing is a 20th-century single-storey addition that extends along the back wall of the house and features a slate roof with a hip on the angle.

The interior has a three-unit plan with a hall and parlour at the front, and a service room and stair in the rear wing. The ground floor rooms are fitted with eight-panel doors, some of which have been re-hung. The parlour fireplace surround retains its original 17th-century dentil decoration on the architrave. A fine late 17th-century staircase features a closed string, square newel posts, and turned balusters.