Construction began in 2009; the museum remained open. The expansion added more than of gallery space, including an underground garage, within the lease lines of the property. Money for the project was raised through private gifts to the capital campaign from individuals, foundations and corporations, and from proceeds from the sale of tax-exempt bonds. The fundraising campaigned covered the $130-million cost of construction and a $31.2 million increase to the museum's endowment to support incremental costs of operating the larger facility. The expanded facility opened in the summer of 2013.