An office building designed by Nadel Architects has earned the LEED Core Shell Gold rating. According to the architect, the 80,000-square-foot Tustin Centre Office Building, a $13 million structure owned by The Muller Company and BlackRock Realty, was designed as a highly sustainable facility and is the first in Southern California to earn the LEED Core Shell Gold rating.

Sustainable features incorporated into the facility include the building’s windows, which are all floor-to-ceiling glass, giving the potential for 95 percent of its occupants’ access to exterior light, including interior offices. Glazing is also an energy-saving component of the project.

In addition, punched windows are glazed with a bronze low-E glass. Nadel added dramatic curtainwall elements, as well as a soaring entrance canopy to emphasize the building’s role as a gateway to the site.

The project was completed last spring.