Willis Tower Repositioning


  • Location:  Illinois, Chicago, USA
  • Execution Year:  2018

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Coordinated_BIM_Model_Willis Tower Repositioning_Pinnacle_Infotech


The Willis Tower Skydeck is one of Chicago’s most popular tourist attractions. Willis Tower Repositioning is an ambitious project to renovate and expand on Chicago’s iconic locale. A Renovation/alteration permit at 233 S Wacker Dr in Chicago was issued in Oct 2017, encompassing construction and interior build-out for a new three-story annex wrapping around the tower’s base. The permit estimates the scope of the work at $200 million—a figure that eclipses the 1,451-foot-tall tower’s total construction cost back in 1973. Expected to eventually cost $500 million, the current project received a $50 million demolition permit in August. More than simply a reimagined lobby, the, Gensler-designed redevelopment of Willis Tower’s base will replace its former fortress-like podium with 300,000 square feet of destination retail, entertainment space, and a glassy “winter garden” atrium. Future dining options will include five-star restaurants, casual eateries, and a fresh food market aiming to serve both the tenants of the building and the neighborhood at large.The new structure’s rooftop will support 30,000 square feet of publicly accessible open space designed to host a variety of programming. Willis Tower property owner Blackstone Group and partner Equity Office expect the ground floor annex to be completed by mid 2019.In addition to the planned street level improvements and new amenities for office tenants, efforts are also in the works to overhaul the tower’s “Skydeck” observatory. The 103rd floor space will likely be expanded to a second level and host new “thrill attractions” such as a chance to rappel down the side of the building inside a transparent enclosure. There would be renovation of lower levels (ll), ll1, ll2, ll3 & upper levels (l) l1, l2, l3 and a new 3-story addition to the base of the building at l1, l2,
and l3 with interior build-out.

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Key Facts

  • 973,356 sq ft (Approx.)

    Project Area
  • 400

    LOD
  • 4 Engineer

    Team Size