The property has undergone a number of additions and renovations to accommodate the expanding collection. A modernist wing was added to the original structure in 1960 and was later renovated in 1989. The addition was named the Goh Annex in honor of Japanese businessman Yasuhiro Goh's contributions to the restoration project. A large-scale construction project was completed in 2006 that added an additional 30,000 square feet to the structure-- 65% of which was below ground. The new space is known as the Sant Building and includes expanded galleries, an auditorium, courtyard, and the Center for the Study of Modern Art.