St Andrew's House

St Andrew's House is a block of nineteen flats, some now used as offices, built in 1875 for the Corporation of the City of London, with a design by architect Horace Jones. Constructed of stock brick with rendered details and a flat roof, the building is arranged symmetrically over four storeys with an attic over the central section. The design includes a central one-bay section flanked by two-bay end wings, with six bays on each side and on each floor set behind galleries of cast-iron with exposed four-centred beams. All windows are glazing-bar sash windows, those in the centre and at the ends having stucco surrounds. The Corporation's badge is displayed on the end wings.

The interiors have been altered, and a lift has been installed. Originally known as Viaduct Buildings, this block is the oldest surviving public housing in London and one of the oldest in Britain. It is the sole survivor of two blocks built by the Corporation, and its design reflects the influence of Sydney Waterlow's model dwellings for the Improved Industrial Dwellings Company, although it incorporates more lavish details, particularly in its use of cast-iron. Sydney Waterlow, a member of the City’s Common Council, was the driving force behind the development.