Cardboard Box Works, 230-250 Bonnington Road, Edinburgh

The Cardboard Box Works, located at 230-250 Bonnington Road in Edinburgh, was designed by Stewart Kay & Walls in 1939, with an extension added in 1946. This two-storey factory showcases a stripped Art Deco style, characterized by a strong horizontal emphasis and a chamfered entrance bay. The building is constructed of brick and features white render, broad window mullions, and a doorway adorned with bottle-green glazed tiles. It has long horizontal strip windows with artificial stone block cills and lintels.

On the southeast elevation facing Bonnington Road, the building has a four-bay layout with a splayed entrance bay on the outer left, added in 1946. The entrance is framed by glazed pilasters and features a 10-panel oak door, flanked by two small windows beneath a projecting curved canopy. Above this, there is a broad rectangular stair window, and the wallhead is capped with stepped coping, which includes a central flagpole that has been re-used from an old building and is now truncated. The strip windows on the ground and first floors are arranged in a pattern of bipartite, quadripartite, tripartite, and quadripartite, with the outer right window altered. There is also a secondary doorway framed by tiled pilasters, located in the window of the bay to the right of the center. Steel ventilators are positioned at the wallhead.

The southwest elevation, facing Tinto Place, was completed in 1946 and features a three-bay design with a vehicular doorway on the left and a secondary doorway on the right, along with single windows on the first floor. The wallhead is treated asymmetrically with gables.

The building includes thin-sectioned multi-pane metal windows, a corrugated-iron roof with a shallow pitch, and patent glazing skylights, as well as ornamental gutterheads. The interior was not seen in 1993, and there is a low rendered wall on the southeast side.