With the ability to accommodate a 2,000-square-foot boutique firm to a 200,000-square-foot Fortune 500 company - what sets 311 apart from other office buildings is a dynamic floor plate. 311 offers up to 10 corner offices per floor, one of the highest perimeter glass-to-rentable floor ratios in Chicago. The bright, open floor plan provides unparalleled views - from lakefront vistas to panoramic cityscapes.