Cousins Properties is back in the game as property owner along N. Congress in downtown Austin, and at the same time – although no one has really noticed – they seem to be running behind schedule on a proposed office building downtown.Cousins famously developed the Frost Bank Tower, a marquee and classy addition to downtown, which stretches up 33 stories and started construction in 2001. Last year, Cousins announced their gorgeous glass-lined 30-story office tower at intersection of Third and Colorado, in a spot initially planned for a hotel.