Rendering of the Austin Convention Center, which will open in 2029. Photo Credit: Courtesy of the Austin Convention Center Department and LMN/Page. New facility by the numbers When it opens in 2029, the new Austin Convention Center will offer 620,000 square feet of rentable space, including 70,000 square feet of outdoor venues. Highlights include a 336,000-square-foot exhibit hall, a 47,000-square-foot ballroom and a 92,000-square-foot flexible hall.