Positioned above the Perth Underground station, at the corner of William Street and Murray Street Mall, one40william comprises three office towers above one level of retail, dining and entertainment.

one40william stands out for its unusual lines, outstanding contemporary architecture and eco-friendly design. At ground level, the building is a major hub in the CBD - linking directly to the Perth Underground railway station, with pedestrian laneways from Forrest Place and Murray Street Mall, connecting Northbridge and the William Street collective. 

With multiple street frontages and access points from Wellington Street, the Murray Street Mall and Underground station concourse the new environmentally sustainable landmark weaves fully-restored, existing heritage buildings into its design. On Wellington Street one40william incorporates the Wellington Building, the original Globe Hotel and the Baird Building, along with the facade of the Mitchell Building on William Street.