On April 8, 2019, the Zumthor-designed building was approved by the Los Angeles County Board of Supervisors. The final approved building designed was scaled back from the original 387,500 square feet (36,000 m2) to 347,500 square feet (32,280 m2), with gallery space shrinking from 121,000 square feet (11,200 m2) to 110,000 square feet (10,000 m2). The new proposal also dropped the black form aesthetics, reducing it to a one-level, aboveground, glass-enclosed, sand-colored concrete building, to save costs.