Posted on:

300 East Randolph Vertical Completion

Project Name

300 East Randolph Vertical Completion


300 E. Randolph St.


Project Status


Year Completed



900,000 sq. feet


Health Care Service Corporation (HCSC)


  • General Contractor: Walsh Construction Co
  • Structural Engineer: Ron Klemencic, Magnusson Klemencic Associates
  • Bruno Spiewak, Cosentini Associates
  • Lighting Designer: Steve Margulies, One Lux Studio
  • Ray Volk, Jenkins & Huntington



View all (10) images

Project Description

300 East Randolph is a two-phased, vertically expanded office tower overlooking Grant Park in Chicago. The 57-story building primarily serves as the headquarters for Health Care Service Corporation (HCSC) and its Blue Cross and Blue Shield of Illinois division.

In the mid-90s, HCSC required a facility that would consolidate operations while providing a plan for long-term growth without relocating. The design team’s innovative solution for accommodating growth is the unprecedented concept of vertical expansion.

The building’s 33-story first phase was completed in 1997; more than a decade later in 2010, phase two was completed, adding 24 stories atop the original, fully occupied building. The fundamental mechanism behind the expansion is a large, five-bay atrium. As high-rises are seldom based on an interior spatial concept, the atrium is unique. Designed to run the full-height of the building and accommodate elevators in both phases, it draws in abundant north light and offers a rare sense of the building’s verticality from the interior. Open shafts add to the transparency while the center atrium bay features an open stair with breakout lounge and meeting spaces. Together, these elements provide a visual and physical connectivity within the company, and an inviting, inspiring space for employees.
Add A Project
Publish Your Projects Show off and upload images, text, and video of your work. We pick the very best for our project newsletters. Upload

Join the Discussion

Please read our Content Guidelines before posting

Close X