Talk about immense. As in 26 stories, totaling 440,000 square feet. An enviable terrace adds another 3,000 for a true outside draw, weekends and holidays included. That’s the count for LinkedIn’s office in San Francisco. The professional networking operation occupies a brand-new shimmery black glass tower, leased just as the architects at Thomas Phifer and Partners broke ground. Interior Architects design director Neil Schneider and director of environmental graphics Julie Maggos, both senior associates, were involved from the outset—you might say even earlier.