Aluminum spandrel panels were used on the exterior of the building, one of the earliest uses of aluminum on a West Coast structure. It was listed on the National Register of Historic Places in 1979.

The building required exterior restoration, including restoration of the exterior façade, roof replacement; and window restoration. There are multiple locations on the exterior envelope where materials had decayed due to water infiltration in the interior wall cavity, causing damage and biological growth on the masonry. As a registered historic building, all work complied with the Secretary of the Interior’s Standards and Guidelines for the Treatment of Historic Properties, and nearly 7,000 bricks and 720 windows were replaced or restored over the course of the project.