Still open-air, the complex was expanded in 1984-1985. This addition brought a fourth anchor -J.C. Penney- and Northwest Wing (in dark gray). The gross leasable area of RIVER OAKS CENTER now stood at around 1,149,000 square feet. An expanded parking area could now accommodate 6,300 autos.

In 1993-1994, RIVER OAKS CENTER was rebuilt into an interior mall. 80,000 square feet of store space (in gray) was added, which connected the existing storefronts into the new, fully-enclosed courts and concourses. The mall now encompassed 1,229,000 leasable square feet.