Marlborough House, 64 Killough Road, Ballymote middle, Downpatrick, Co Down, BT30 8BL

Marlborough House is a large gentleman's residence situated at the end of a drive approximately 1½ miles south of Downpatrick. The principal building dates from around the 1740s and comprises a double-pile structure of two storeys with an attic and basement. A substantial two-storey return extends to the rear, largely dating from the late 18th century.

The symmetrical front façade faces roughly west and terminates in a full-height gabled bay. The main entrance, positioned centrally within this bay, is approached by a broad flight of steps. The doorway consists of a panelled door, likely original, flanked by v-channeled pilasters and crowned with a cornice and broken pediment on brackets, enclosing a semicircular fanlight with gothick tracery. Large eight-pane sidelights with cornice surround the entrance. Directly above at first-floor level sits a Palladian window with sash frames glazed in Georgian panes (1/2, 12/6, 1/2), set within a plain surround with bracketed sill. On each side of the bay at ground and first-floor levels are paired sash windows with Georgian panes (6/6), fitted with what appear to be late Victorian moulded labels. At basement level are further paired windows without labels. The front façade is rendered with in-out beveled quoins and painted throughout. The basement lightwell is enclosed by simple wrought-iron spear-head railings with open ironwork end piers.

The south façade is largely clad in rough-hewn slates and blank in character. At ground floor stands a single-storey rendered projection with a part-gabled, part-shed roof, containing a doorway on its east face and a small window with modern two-pane frame on its south face.

The north façade is rendered and unpainted, with two tall projecting chimney breasts. At ground floor are two windows (left and centre), with two further windows directly above at first-floor level. The upper windows retain Georgian panes (6/6) whilst ground-floor windows are plain sash. At basement level to the left is another sash window (2/2).

The large rear return comprises two sections built at different periods, with the larger section to the right (north) being the older. The left section originally carried a flat water tank (probably added in the early 1900s) and is currently being reconstructed with a new floor and gabled roof. The east face of the left portion features a two-pane sash window at ground floor, a four-pane sash window at first floor, and a small frameless window opening at attic level. The east face of the larger portion contains a four-pane basement window, a large tripartite sash window at ground floor (2/2, 6/6, 2/2), and a single four-pane sash window at first floor.

The rear façade of the main body has two small two-pane basement windows. Set between basement and ground-floor levels is a timber-sheeted door, with plain sash windows to both ground and first floors (two to each level). Above the door, a stair landing contains a margined sash window, with another identical window on the floor above. The rear elevation is rendered and unpainted. Velux windows have been inserted into the roof well, not visible from ground level. The gabled roof is currently being reconstructed in slate. Four brown brick chimney stacks, possibly mid-20th century replacements, rise through the roof.

Single and two-storey outbuildings occupy the rear of the property, some recently altered. The entrance drive is screened by a curved wall with thick square panelled piers and rendered and lined walling. The principal vehicle gates have been removed, though a wrought-iron spear-head pedestrian gate remains in place.