Rock House, Main Street, Garelochhead

Rock House is a mid-19th century cottage that was enlarged in the later 19th century into a two-storey, asymmetrical, rectangular plan gabled villa. The exterior is constructed from whinstone and sandstone rubble with harl pointing and stugged red sandstone margins. A base course, quoins, and projecting eaves are visible, along with exposed rafters.

The south elevation features four asymmetrical bays. A broad gabled bay is advanced centrally with two large windows at ground level and a bipartite window at the gablehead. A single-storey outshot adjoins the corner to the right return. A recessed bay is positioned to the outer right, with a bipartite window off-centre to the left, and a gabled dormerhead above. A recessed block to the outer left incorporates a timber verandah, with the roof sweeping down in a re-entrant angle and supported by posts and curved brackets. A gabled dormerhead is positioned in the roof to the right of the block, and two windows are symmetrically placed at ground level.

The west elevation presents three asymmetrically disposed bays. A broad gabled bay extends to the outer right, featuring full-height canted windows and a blank plaque between the ground and first floors. A lower, recessed block is located to the right, with a canted conservatory built on a red sandstone base in the re-entrant angle. A single-storey lean-to storage block is situated to the outer left.

The north elevation includes a single-storey and attic kitchen block with a lean-to single-storey projection at ground level, comprising three bays with a coal-shute door to the outer right. The main entrance is located on the right return, with a storage block advanced to the outer left, featuring a glazed lean-to roofing over the entrance door and window. A broad, two-storey, blank gable is recessed to the right, with a single-storey lean-to projection to the outer right, featuring a boarded door.

The east elevation showcases a four-bay block of the main house, alongside a single-storey kitchen block to the outer right. A broad, advanced gable is present in the penultimate bay to the left, with a door to the ground right. A two-leaf square window with bolection moulding is positioned to the left, with a small step leading to the door. A window is centered in the gablehead. The right return of the south gable extends to the outer left. Two asymmetrically disposed bays of the main block are present to the right, featuring a bipartite window at ground level to the left and a large window to the right. A gabled dormerhead is located to the left, with two smaller windows at the first floor to the outer right. A tall stack rises to the left of the dormerhead, and a slate-hung wall is visible at the right return. A single-storey service block is situated to the outer right, featuring a door to the left and a modern tripartite window to the right.

The windows are predominantly plate glass sash and case, with a six-pane sash and case window on the east elevation. Some replacement pivot and swing windows are also present. The roof is covered in variegated purple, green, and grey slate, and tall, corniced wallhead stacks are topped with octagonal cans.

Gate piers are paired square piers with recessed plaques at center and corniced pyramidal caps. A tall rubble boundary wall with semicircular coping surrounds the house and garden, incorporating a concave curve between the piers.