Thursday / September 22, 2022 / 12:30 PM - 5:00 PM

Existing High-Rises: Refurbishing and Repurposing Three 20th Century Icons

Harris Bank Auditorium, 115 South LaSalle Street, Chicago

Starting in the late nineteenth century, cities such as Chicago and New York led the invention and development of the high-rise building typology as we know it today. Given their as-built legacies and the relatively recent concerns revolving around sustainability and embodied carbon, it is understandable that New York and Chicago also lead the way in the retention, refurbishment, and repurposing of this building type. This year’s seminar features presentations by the project teams of three genuine 20th century icons, which are now repositioned to extend their legacies well into the 21st century: Lever House in New York City, Tribune Tower, and Willis (Sears) Tower in Chicago.

Learning Objectives

  • Recognize the intersection of building technology, historical research, regulations framework and economic necessities as impacts the redevelopment process.
  • Compare each owner’s goals and vision affecting the approach each design team took in the redevelopment of each project.
  • Identify how fundamental changes in use have been implemented while preserving each project’s iconic architectural character.
  • Assess how each team dealt with the unknowns that are inherent in working with existing buildings and discoveries made on site in the process of carrying out each project.

Proceeds from this annual seminar help fund the Chicago Committee on High Rise Buildings (CCHRB) scholarship program.


  • $150                      members of CCHRB and co-sponsoring organizations
  • $175                      non-members
  • $50                        students
  • Group discounts of 5 tickets for the price of 4 are available.

Click here for full details and registration.

Hosted By

CCHRB with many promotional partners including AIA Chicago

Learning Units


Member Price


Non Member Price