The practice was originally granted permission for a 16-storey, 155,000m2 scheme for the site's previous owners back in 2001.
As a result Bennetts, together with engineer Whitbybird, was asked to completely overhaul the building's environmental standards, changing the layout and removing an 'awkward' mezzanine floor between the ground and first floors.
Stanhope's Andy Butler says the building will feature solar-heated water and roof terraces with water reclamation systems, and he hopes the scheme will surpass the current Part L sustainability targets by as much as 20 per cent.
He added: 'The overall building shape - with its roof that slopes down to the conservation area - is fundamentally the same - However, we have changed the whole environmental strategy.'
The revised application was given the nod by the City of London's planning committee last week and demolition on site is expected to start next month.