55 Southbank

In a first for Melbourne, WSP applied innovative structural engineering techniques to grow this inner city building in Melbourne to one of the tallest timber building extensions in the world. By using the latest in timber construction technology, WSP designed to use cross laminated timber (CLT) to transform the existing six-storey building by adding a 10-storey hotel.


  • Melbourne, Victoria, Australia


  • Hume Partners (Property) Pty Ltd

Project Status

  • Complete.


  • CTBUH 2022 Award of Excellence – Renovation Award

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CO2 offsets (tonnes)
4,200 4,200
Cross laminiated timber (tonnes)
5,300 5,300
New floor space (m2)
13,000 13,000