Bonnybridge, Bonnyside Road, Bonnyside House

This is a mid-19th century house with additions from the later 19th century. It is an L-plan, two-storey building with a harled exterior and a projecting central kitchen wing at the rear. A single-storey brick laundry wing is attached to the left of the rear elevation, and a detached former stable block, now used as a garage and storage space, sits to the northeast of the main house. The base course is of painted ashlar.

The front (west) elevation features a slightly projecting gable on the left side, containing a tripartite window on the ground floor and a bipartite window above. A raised, shield-shaped plaque is positioned above these windows, and may have originally displayed a date or initials. A single-storey, gabled porch, with its gable facing south, is set into the re-entrant angle, and contains a two-leaf timber-boarded door with a two-pane fanlight. The central section has two bays, while the right side features a slightly recessed single bay with a lower ridge line than the sections to the left.

The rear (east) elevation is arranged as a two-bay section on the left, with the single-storey laundry wing projecting to the far left. The projecting kitchen wing occupies the centre, with a glazed and brick porch added to its gable end. A two-bay gabled section completes the rear elevation on the right.

The north side of the house is largely blank. The north elevation of the laundry wing has seven bays; windows are present in the first and third bays from the left, while the remaining bays have timber-boarded doors. The south side has a primarily blank two-storey gable end, with a timber door and a small window on the ground floor. The rear wall of the laundry wing includes a door and a brick and timber-framed lean-to greenhouse.

Most windows are timber sash and case, with 4, 6, or 8 panes, some being border glazed. The roof is covered with pitched slate tiles, and features stone skews, shaped skewputts, and a stone finial at the apex of the front gable. Corniced gable head stacks, shouldered on the north gable, are topped with octagonal and circular cans. Three corniced ridge stacks with octagonal cans are present on the laundry wing. Rainwater goods are of cast iron, including moulded rhones.

The interior features geometric floor tiles in the porch, decorative plasterwork in three public rooms, plain plasterwork elsewhere, and a grey marble fireplace in the first-floor drawing room.

The former stables have a large opening with a garage door on the west gable's ground floor, with a timber-boarded opening above. The south elevation has two windows and a timber door to the right, with a dormer window on the roof.

A rectangular walled garden is enclosed by a low brick wall topped with rounded terracotta copes. A dwarf wall surmounted by brick piers is situated along the west wall.