The Empress State Building was renovated to a design by Wilkinson Eyre Architects, completing in July 2003. The renovation added 3 storeys to the top of the building, increasing the structural height from 100m (328ft) to 117.3m (385ft).
The cost of refurbishment was in the region of £80 million.
The top of the building boasts Orbit - a revolving 30th floor with spectacular views over London.
Empress State Building was an RIBA award winner 2004.
The project architect was AA van Nuffelen.
At the time of original completion, this was the last major office building in London to be built without air-conditioning.
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