CHICAGO—Alter Group officials never seem veryworried about the 2015 departure of Google from160,000-square-feet in its 20 West Kinzie building. They remainconfident that the building's qualities and the extraordinarydemand for River North offices will help fill that hole. AndChicago-based Alter has just signed up a new fine-dining restaurantfor the 17-story, 385,000-square-foot building, increasing thechance that firms looking for space next year will continue to seeit as a vibrant destination.

David Flom and Matt Moore, theproprietors behind the Chicago Cut Steakhouse inRiver North and The Local Chicago in the GoldCoast, will develop the restaurant, C Fish-HouseChicago, their third venture. Chicago architectMark Knauer of Knauer Inc., whodesigned local dining establishments such as HarryCaray's, Trattoria No. 10, AtwoodCafé and The Gage, will design thespace.

“River North is really Chicago's only 24/7 neighborhood,”Matthew Ward, senior managing director ofNewmark Grubb Knight Frank and exclusive leasingagent for 20 W. Kinzie, told GlobeSt.com, making it the mostattractive submarket for the many firms seeking to attract youngerworkers. “It's more crowded at 8 o'clock at night than it is at 8o'clock in the morning, and it's really the only neighborhood youcan say that about.”