55 Southbank Boulevard

55 Southbank Boulevard, located in Melbourne, Australia, is a groundbreaking example of adaptive reuse and sustainable construction. Originally built as a 10-story commercial building, it underwent a pioneering transformation with the addition of five levels made entirely from Cross-Laminated Timber (CLT) and Glued Laminated Timber (Glulam). This extension, designed by Bates Smart and built by Multiplex, makes it the tallest mass timber vertical extension in Australia.

The project demonstrates the potential of mass timber in large-scale adaptive reuse, offering a lightweight yet strong alternative to traditional construction materials. The timber extension was chosen because it significantly reduced structural load, allowing the existing foundations to support the additional floors without major reinforcements. This approach also enabled a faster, quieter, and more sustainable construction process, minimizing disruption in Melbourne’s busy Southbank precinct.

The engineering expertise of TTW (Taylor Thomson Whitting) ensured that the timber structure met rigorous fire, durability, and performance standards. The project has achieved a 5-Star Green Star rating, highlighting its commitment to sustainability by reducing embodied carbon and enhancing energy efficiency. The expansion now houses Adina Apartment Hotel Melbourne Southbank, offering guests a unique blend of modern hospitality within an innovative, eco-friendly architectural landmark.

By seamlessly integrating mass timber with an existing structure, 55 Southbank Boulevard sets a new benchmark for sustainable high-rise extensions, showcasing the future of urban development through adaptive reuse and low-carbon construction.

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