The south end of "Chaddy" was rebuilt in the late 1990s, as part of a Stage 20 project. The original (circa-1960) Myer was demolished, with the new store -seen here- being dedicated in November 1998. It was joined by a David Jones department store one year later. These were linked by a curving, sunlit galleria concourse, completed in December 1999.
Photo from Wikipedia / "Raider2044" 


A "Stage 30" expansion, known as Chadstone Place, opened between late 2008 and early 2009. This "outdoor-style" addition consisted of 1 and 2-level structures, with a single-level parking deck covering a building on its east end. Chadstone Place housed several exterior-entranced stores, a "Fresh Food Precinct," al fresco dining area and 4-storey office tower.    
Photo from http://www.e-brochures.com.au / The Buchanon Group


A Woolworths supermarket, anchoring the new Chadstone Place addition, debuted in October 2008. The mega mall now featured three food stores; Woolworths, Aldi and the existing Coles. There was also a Colonial Fresh Markets fruit & produce store.
Photo from Wikipedia / "Alpha"


By 2009, the Melburnian shopping precinct is promoted as "The Fashion Capital." In this diagram, we see its Ground Level (or Upper Mall). The area in yellow (mostly composing the original -1960- structure) is being redeveloped. When this West Mall project is completed, the shopping complex will encompasses 2 million lettable square feet. Parking provisions will be provided for 9,500 autos.
Original graphic from http://www.chadstoneshopping.com.au


Work got underway on the "Stage 33" (West Mall redevelopment) project in May 2008. The 278 million dollar retrofit, which encompassed 463,000 square feet, was completed in November 2009.
Photo from http://www.worldarchitecturenews.com