The practice's London office secured planning consent last month for the 4,000m 2office building for its client, PPG Southern.
It is the second permission that the firm has secured for the site. The practice had already gained consent from the land's previous owner, Longwood Estates, for another office development.
According to Tim Tolcher, a director with the London office, his brief was to create a more modern envelope and increase the efficiency of the building by ramping up its floorspace.
The project is in a prominent location at the junction of the High Street and Marketfield Way, in the town centre.
'It's hoped that we've now created a landmark, to be seen as you move into the city centre,' said Tolcher.
According to the architect, the development will be completed in time for the spring/summer of 2007.