Bonnington Bond Warehouse, 15-21 Breadalbane Street, Edinburgh

Circa 1860-70 (S and W block); circa 1905 (N block). Substantial complex of 4- and 8-storey brick and rubble-built warehouses, former sugar refinery, maltings and bonded warehouses converted to residential use (2004). S block squared and snecked sandstone rubble with rock-faced dressings; W and N block red brick at elevations to street. Early use of wrought-iron beams in widescale industrial construction (see Notes). Projecting 3-storey glazed vestibule to S block and twin atria by Percy Johnson-Marshall, 1990. Later additional glazed storey and refacing of façades to central courtyard with timber and blue terracotta tiles by JMA Architects 2004.

S BLOCK: former maltings, circa 1860-70. 4-storey; 5- by 20-bay; small windows; N elevation with rectangular raised clock tower to centre. Now converted to offices, cast-iron columns exposed; timber floors encased.

W BLOCK: former sugar refinery, 1865-66, 6 northernmost bays raised circa 1900. 8-storey; 3- by 12-bay; segmental-arched windows; ground floor with windows set in recessed segmental-arched panels; bays above divided by strip pilasters; moulded eaves cornice. E elevation with square stair tower and later metal-clad lift tower; 2 storey engine house (later converted to offices) with forestair and dentilled cornice to right. Flat roof with cast-iron water tank to S; railings to N.

INTERIOR: S block with single row of stout cast-iron columns with bell capitals, wrought-iron beams and timber floors; fireproof brick-arched 5th floor; roof of iron plates on cast-iron joists. Ground and 1st floor of N block with 2 rows of cast-iron columns, mezzanine inserted, 2nd floor fireproof brick arches; timber floors, steel frame and timber roof above. Cast-iron stairwell with central well formerly for steam elevator. Later alterations (2004) encasing interior features with demountable partitions raised floors and suspended ceilings.

N BLOCK: circa 1900. 8-storey and basement; 8- by 9-bay; segmental- arched windows. Tall round-arched L-shaped pend from W to S elevation at junction with W block (railway access); wide rectangular bricked- up) opening to W elevation. 9 piended slate roofs; wallhead stacks to N and S.

INTERIOR: steel-frame with wooden floors; basement with flat hollow tiles and steel work encased in concrete as fireproofing. 2-storey office building with piend roof adjoining to SE. Later alterations encasing interior features with demountable partitions raised floors and suspended ceilings.

Small-pane or fixed windows with iron grilles. Wheel pattern tie plates to W block. Single storey brick and rubble wall (remains of demolished sugar warehouse) to S forming courtyard with window openings to E.