Infilling the adjacent surface parking lot at the podium level, the addition sensitively incorporates office and lab space, while gesturing to the industrial character and massing of the existing building. The facade takes advantage of the site’s visual prominence, its shifting pattern of folded planes of floor-to-ceiling glass appearing to float within an extruded frame. One of the key elements of the design solution was cantilevering the new building from the adjacent empty lot over the existing 543 Howard to allow that building to remain occupied throughout construction. A series of balconies carve into the mass of the tower, connecting at the ground level to a vegetated wall that runs along Tehama Street. This integration with the surrounding environment continues up the height of the tower: as glazing wraps the four sides, it renders the volume reactive to the changing weather, reflecting and refracting light and cloud cover throughout the day.