The owners of two adjacent office parks along the MoPac frontage road containing three buildings and a parking garage are now seeking a 12.26-acre rezoning for a mixed-use redevelopment that could build more than half a million square feet near Steck Avenue in Northwest Austin. The Park and Park North office complexes, respectively dating back to 1981 and 1999, are located at 8300 and 8200 North MoPac and both owned . . .