A plan to transform downtown Austin’s old HealthSouth building has taken a significant step forward. City Council approved moving ahead with negotiations for a master development agreement with Aspen Heights Partners LLC. A final agreement could come early next year, and then Aspen Heights could start work on two 37-story towers with 921 apartments — with 25% reserved as affordable housing for those with low incomes. Click through to read more about this project, which has been years in the making.