The north end of Australia's largest shopping mall was rebuilt between 2014 and 2017. A new & improved Entertainment Zone was enclosed with a glass gridshell roof; the first such structure built in Australia. When construction dust settled, the mall encompassed a whopping 2,260,400 lettable square feet, with a retail roster of 550 stores and services. There was now free parking for 10,000 autos.
Photo from Wikipedia / "Wpcpey"

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The "Stage 40" renovation installed two new food facilities. A Dining Terrace was situated on a new Level 1 (actually a third floor), with the Food Central complex filling a reconstructed section of Lower Ground Level space.
Photo from http://futurefood.com.au

We wind down our "Chaddy" excursion with a circa-2019 Ground Level store map. Before the most recent remodeling, the mall consisted of 2 floors; the Lower and Ground Levels. With the newly-rebuilt Entertainment Zone (bounded in dark gray), there are now 4; Lower Ground Level, Ground Level, Level 1 and Level 2. Moreover, the mega mall's six car parks are now designated by the letters "A" through "F."
Original graphic from http://www.chadstoneshopping.com.au 

A "Stage 38" project enlarged the existing Myer (or "F") Car Park and added the 11-storey Chadstone Tower 1, an 85 million dollar office facility. 

Photo from http://www.colliers.com.au