Bonnington Bond Warehouse, 15-21 Breadalbane Street, Edinburgh

The Bonnington Bond Warehouse is a substantial complex of warehouses, originally a sugar refinery and maltings, built in stages between the 1860s and 1905, and subsequently converted to residential use in 2004. The complex is situated at 15-21 Breadalbane Street, Edinburgh. It comprises three distinct blocks: a southern block, a western block, and a northern block, constructed of brick, rubble, and sandstone. The southern block exhibits squared and snecked sandstone rubble with rock-faced dressings, while the western and northern blocks are primarily red brick facing onto the street. A notable early example of wrought-iron beams in industrial construction is a feature of the original design. A projecting three-storey glazed vestibule is present on the south side, along with twin atria designed by Percy Johnson-Marshall in 1990. Later additions in 2004 include a glazed storey and the refacing of the central courtyard façade using timber and blue terracotta tiles, also by JMA Architects.

The southern block, dating from circa 1860-70 and formerly a malting, is four storeys high and arranged with a 5-bay by 20-bay layout. It features small windows and a north-facing elevation displaying a rectangular raised clock tower at the centre. The interior, now offices, exposes stout cast-iron columns with bell capitals, wrought-iron beams, and timber floors. A fireproof brick-arched fifth floor and a roof of iron plates on cast-iron joists are also present.

The western block, built between 1865-66 and originally a sugar refinery, has six northernmost bays raised circa 1900. It is eight storeys high and features segmental-arched windows. The ground floor has windows set within recessed segmental-arched panels, with bays above divided by strip pilasters and a moulded eaves cornice. The eastern elevation includes a square stair tower and a later metal-clad lift tower, along with a two-storey engine house (later converted to offices), a forestair, and a dentilled cornice. A flat roof incorporates a cast-iron water tank to the south and railings to the north. The interior of the ground and first floors features two rows of cast-iron columns, with a mezzanine level inserted and later fireproof brick arches on the second floor. Timber floors, a steel frame, and a timber roof are present above. A cast-iron stairwell with a central well originally housed a steam elevator. Modern alterations include the insertion of demountable partitions, raised floors, and suspended ceilings, partially concealing original features.

The northern block, dating from circa 1900, is eight storeys high, with a basement, and has an 8-bay by 9-bay layout. It features segmental-arched windows and a tall, round-arched, L-shaped pend providing railway access, linking it to the western block. A wide, bricked-up opening is visible on the western elevation. The block is topped with piended slate roofs and wallhead stacks to the north and south. The interior is a steel-frame structure with wooden floors, with a basement featuring flat hollow tiles and steelwork encased in concrete for fireproofing. An attached two-storey office building with a piended roof sits on the southeast side of the northern block. Like the other blocks, alterations in 2004 include demountable partitions, raised floors, and suspended ceilings.

Windows are generally small-pane or fixed, with iron grilles. The western block has wheel pattern tie plates. A small-pane or fixed windows with iron grilles are present. A single-storey brick and rubble wall (remnants of a demolished sugar warehouse) forms a courtyard to the south, with window openings facing east.