The sneaker company's plans for 1.3 million square feet of new space was approved by the county's Land Use and Transportation department.
The residence hall would house 500 and allow for upgrades to Bean, Hamilton and Walton halls.
The 220,000 square-foot sanatorium could be open by the end of the month.
City leaders are optimistically expecting the move to not further damage the affordable-housing market.
The expert's study refutes the 2014 Urban Growth Report.