Designed by architectural firm, Hall and Prentice, City Hall has a great circular hall and corridors surounded by offices and function venues. The main entrance from King George Square is emphasised by imposing Corinthian columns that are nearly 14 metres high. The building has a clock tower rising 92 metres above the ground. One of the main building features is its grand marble staircase.
The Main Auditorium is City Hall's single largest space. The copper dome over the room is the largest in Australia, spanning 31 metres in diameter. The dome is supported on a brick base that allows the interior of the Main Auditorium to be unobscured by columns.
City Hall workers tried to use locally-sourced materials and were proud to handcraft the finer details of the building. The artistry and craftsmanship of the City Hall architecture draws thousands of interstate and overseas guests to the building each year.