140 William Street, Perth

140 William Street, also known as one40william, is a prominent commercial development in Perth, Western Australia, featuring the Gordon Stephenson House. Named after the influential architect Gordon Stephenson, the building plays a key role in the city's urban landscape and houses several government departments. Standing at 92 meters tall with 20 floors, it integrates with the Perth railway station and has received multiple design awards, including an International Architecture Award in 2012. The site has a rich history, having been developed following the construction of the Perth Underground station, with a total investment of $200 million. Its design incorporates heritage elements from surrounding historic buildings, making it a significant landmark for both tourists and researchers interested in urban development and architecture.