Owing to architectural developments around the so-called Zuid-as, the Southern Axis of Amsterdam, and developments in the office market, a far-reaching upgrade, and expansion of the World Trade Center in Amsterdam became necessary only ten years after its official opening in 1985. On behalf of the owners, Trimp & van Tartwijk Property Performance N.V. acted as principal for the redevelopment project. A combination of architect firms was selected in 1995: Kohn Pederson Fox Associates of London and OeverZaaijer architecture and urbanism of Amsterdam. The renovation and new construction of the WTC comprises a total area of 120,000 m2 and was realized in 5 phases in the period 1998 – 2004.
Following a thorough analysis, the combination of architects drew up a Master Plan for the renovation and expansion of the existing WTC and the construction of a new section on the western side. The plan provided for the phased realization of a completely new architectural and urban planning concept, which would incorporate the existing office towers with a new appearance. Five phases saw the area of office space doubled, the functionality and environment of the existing buildings were improved and a thorough revision of the relationship to the surroundings.
The existing WTC complex was tackled in the first three phases. The most important design principle was to break through the closed character of the existing complex of buildings. Now, the new glass entrance building on the Zuidplein square welcomes visitors with an inviting gesture and almost automatically leads them to the heart of the building: the atrium. The atrium is a very spaciously designed central area, bordered by the five existing towers and a fifth newly constructed tower. An undulating glass roof high above the central area connects the towers and gives the complex a new,