The redevelopment of 30 Crown Place, in the Sun Street Conservation Area of Shoreditch, will feature two triangular-shaped buildings - the higher a 19-storey tower and the lower a 10-storey block on the south of the site.
According to the architects 'the facade architecture echoes the fine human scale of the neighbouring Broadgate buildings, but contrasts its darker hues with lighter tones.'
In October last year the practice narrowly missed out on another commercial scheme on the same street after the plot was sold by the developers.
HCLA hopes this latest project help will kick-start the regeneration of the City along the Hackney border.
A spokesman for the practice said: 'The renewal of this area of the borough will enable it to become an attractive business quarter in its own right and rediscover its economic dynamism, with Crown Place at its heart.'