Northern Bank, 29 High Street, Ballynahinch, Co Down, BT24 8AB

Northern Bank is a three-storey bank constructed in 1864 for the Northern Banking Company, possibly designed by architects Lanyon & Lynn, who undertook considerable work for the bank during this period, though this attribution remains uncertain. The building stands within the terrace on the west side of High Street in Ballynahinch town centre, presenting an asymmetrical front façade facing east.

The ground floor features three tall semicircular arched recesses with decorative moulded archivolts and keystones. The entrance, a panelled double door with a fanlight now covered by the bank's corporate logo, is located in the left recess. The centre and right recesses contain sash windows with panelled stall risers. The original entrance was positioned within the right recess but was relocated to the left sometime after 1974. An ATM has been inserted to the immediate right of the current entrance. At springing level, the archivolts are linked by a decorative string course. The render below rusticated treatment ends with a bevelled base. Between the arches are moulded roundels displaying the original intertwined letter logo of the Northern Banking Company, which were covered by the Midland Bank logo between approximately 1970-71 and 1988.

The first floor displays three sash windows, smaller than those below and featuring segmental heads. These windows are surrounded by richly decorated Baroque pediments with arched forms, square keystones and elaborate cartouches. The windows rest on a plain sill course with a cornice-like course incorporating dentils below. Decorative pierced panels occupy the space between these courses, aligned with each window. Above the windows sits a plain string course bearing raised plastic letters spelling the bank's name. The façade at first and second floor level is finished in lined render with bevelled quoins.

The second floor contains three windows, similar in shape but smaller than those on the first floor, with simple shouldered and heeled surrounds incorporating plain brackets to the sills. Above these is a dentilled eaves cornice. The entire front façade is painted.

A projecting internally lit plastic sign occupies the ground floor to the right.

The rear elevation is entirely functional in appearance with no decorative features. It is dominated by a large single and two-storey return, apparently largely flat-roofed, which has been substantially altered and extended over time. The return is finished in plain render with modern windows, doors, a roof terrace and a modern fire escape. The rear façade of the main building contains a plain sash window on the first floor to the right, with two smaller windows featuring Georgian panes on the second floor. To the far left between first and second floors is a plain sash stairwell window. This rear façade is finished in plain painted render.

The exposed north and south gables have no openings and are finished in plain painted render. The gabled roof of the main building is slated with two tall gable chimney stacks featuring bevelled bases and cornice courses. To the rear stands a rubble-built two-storey outbuilding.