1 King William Street, an exceptional office development in Central London, designed by Allford Hall Monaghan Morris and developed in partnership with Kajima, has been awarded first-prize at the 2017 Architects’ Journal Architecture Awards.
This intervention in a 1920s Grade II-listed structure and an adjacent building is perfectly detailed and intelligently restrained, setting a new standard for the refurbishment of City of London office buildings.
An additional storey and roof terrace are discreetly introduced, and the elevational treatment is well-considered, with varied window reveals, stepping planes and subtle changes of brickwork that relate well to neighbouring properties. The clever introduction of a double order, which frames the four lower floors, aligns with the cornice of the adjacent Neoclassical building. Contemporary detailing of hand-thrown bricks and bronze-toned metals relates well to the heritage context.
Most dramatic is the introduction of a level change in the lobby as well as a terrazzo floor and a spectacular bespoke light fitting, which add grandeur while retaining the qualities of the original space.
This is a thoroughly well-designed and executed piece of architecture, which transforms a heritage building and its neighbour into an appealing and efficient 21st-century workplace. ‘The lobby is full of delight and the exteriors reward study as an exemplar for new City offices,’ said the judges.