88 Walker is a striking new mixed-use commercial tower in the heart of North Sydney’s commercial core. Completed by Billbergia in September 2023, the tower spans 50 levels and sits 180 metres high above street level - making it the tallest building in North Sydney. The project features an eye-catching signature cantilever that has dramatically expanded the available floor space and enabled much of the completed structure to sit suspended above the heritage-listed Firehouse Hotel. As well as being an iconic architectural feature, the unique design that cantilevers from the main core from level 5 (using structural steel jumpstart columns), has increased the building’s floor space capacity from around 4,000 to 22,800 square metres. With a 5 Star Greenstar Design & As-Built, 88 Walker features a double height entry lobby with through site pedestrian connection between Walker St and little Spring St. It dedicates 20 levels to the new 252-room, 4-star Citadines Walker North Sydney hotel, with a further 24 levels delivering 12,500 square metres of open-plan, PCA A-Grade office space. The project also boasts eight levels of facilities including a café, restaurant, executive lounge, hotel gym, and three floors of end-of-trip amenities, with plant room space at B2, B1, as well as levels 24, 34 and 47. In addition to creating a new 50 storey landmark, the project also included alterations and refurbishment of the existing Firehouse Hotel, below the ‘feature lit’ soffit of the cantilever from level 5.   Overcoming the constrained footprint with minimal access in a busy CBD location and completing the cantilevered design over a heritage hotel and the building’s slender shape extending 50 levels with numerous movement criteria, are a testament to the construction team’s dedication and commitment.   88 Walker has all the unique hallmarks of a challenging but ultimately successful build that makes it a worthy award winner.