9 South Harbour Street, Ayr

11-13 South Harbour Street is an early 19th-century, three-storey and basement tenement and commercial building located on a corner site. It features a single-storey bowed projection to the west. The ground floor is finished in harl, while the upper storeys of the northeast and northwest elevations are covered in painted render. The building has a base course and a cill course at the first floor on the northeast elevation, with painted margins around the window openings and architrave surrounds on the upper floors of both the northeast and northwest elevations.

On the northeast (entrance) elevation, there is a central entrance featuring a columnar doorpiece with a cornice and block pediment. This entrance has a two-leaf timber door with an infilled fanlight above it, flanked by two single windows in the outer bays. The upper floors have regular fenestration, although there are blind windows in the outer right at both the first and second floors. The basement has openings in the bays to the right of the doorpiece.

The northwest (side) elevation consists of three bays, with pilaster strips marking the bowed, flat-roofed five bays at the ground floor. It has a central square-headed entrance with a two-leaf timber door and two single windows flanking it. The upper floors also have regular fenestration.

The southwest (Boat Vennal) elevation has five bays, arranged in a 2-3 grouping. There is a timber entrance door at the ground level on the outer right, with two single windows to the left. Above, there are three windows on the first floor and two on the second floor, with two additional windows at ground level on the outer left.

The building predominantly features 12-pane timber sash and case windows. The roof is a grey slate piend, with shouldered wallhead stacks and circular and polygonal chimney cans to the east. The interior was not seen in 1998.