Castle Grant

Castle Grant is a 15th or early 16th century L-plan tower house that features a wing to the west. The original entrance is located in the south re-entrant angle and was partially encased and recast to the north in 1765, transforming it into a U-plan mansion designed by architect John Adam. The northern front is made of squared and coursed ashlar granite, while the other elevations are harled with ashlar margins.

The symmetrical four-storey, seven-bay northern front from 1765 has a central entrance flanked by a round-headed rusticated doorway with a radial fanlight. Some of the front windows are blind, and there is a moulded eaves cornice along with a piended platform slate roof. The eastern and western elevations extend downward in height to enclose a U-plan court that opens to the south, incorporating the original tower house with a later raised caphouse on the west. The symmetrical two-storey, wide five-bay western elevation of the eastern kitchen wing opens to the court with a wide central entrance and flanking round-headed windows, all of which have blocked imposts.

The southern court is raised above the basement and is closed at the south by a low crenellated wall, accessed by a flight of steps. A portion of the western wing was gutted and left roofless in 1985.

The interior features a simple entrance hall with a restrained plaster cornice and circular detailing, including a central rosette on the ceiling. The stair hall contains a cantilevered stone staircase with a decorative scroll cast-iron balustrade, and the plaster ceiling has a cornice and a central "parasol" rosette. The dining room, which was formerly the first-floor great hall, was re-panelled around 1765 and features similar panelling on the ceiling. There are modern replacement chimneypieces at each end.

In the drawing and ante-room, there is a 1765 palmette and antemion frieze along with a central rosette in the drawing room and a floreated rosette on the ante-room ceiling, both with replacement chimney-pieces. The library has a shallow barrel vaulted ceiling that was panelled around 1765, featuring a key-pattern frieze and key-pattern detailing on the chimney piece. Additionally, there is a small strong room with an iron door and iron window shutters located in the northeast corner of the house on the first floor.