Chicago Spire — unbuilt 2,000 ft tower in Chicago

Design and characteristics

Calatrava's concept emphasized a continuous, twisting form: each floor plate was rotated slightly relative to the one below, producing a corkscrew silhouette intended to reduce wind loads and offer varied apartment layouts. The program focused primarily on condominiums, with lower floors planned for parking, amenities and retail. Early construction work included foundation excavation and substantial below‑grade structural elements. Renderings and models highlighted the tower's tapering profile and a spire‑like crown that would have given the building its name.

History and timeline

The project was announced and received approvals in the mid‑2000s, with ground‑level work and foundational construction beginning before the global financial crisis of 2008. The economic downturn, tightened credit markets and rising costs halted vertical construction; by the time work stopped only substructure elements and limited foundations had been completed. Over the following years the site and the project's finances were entangled in legal disputes, lender actions and attempts by the original developer to regain control or find new financing. In 2014 a court decision effectively ended plans to resume the original Spire project.

Aftermath and redevelopment

Ownership of the site changed hands in the mid‑2010s. In November 2016 the property was transferred to Related Midwest, which later proposed an alternative redevelopment consisting of multiple towers rather than reinstating Calatrava's single spire. Various proposals and concepts have been discussed for the parcel, and new plans have continued to evolve as market conditions and city priorities changed. One separate proposal that has been mentioned for the location is the Gateway Tower, another high‑rise concept that appears in public discussions about redeveloping the same block.

Legacy and notable points

• The Chicago Spire became one of the best‑known examples of a visually ambitious skyscraper that was never completed due to economic and financial constraints.
• Its twisting architecture drew international attention and is often cited in conversations about iconic but unrealized urban projects.
• The site's subsequent sale and new proposals illustrate how prime downtown parcels can be repurposed after large projects fail or stall.

For more contemporary reporting and archived project materials, see the project pages and coverage linked here: Chicago Spire project overview, developer statements and design images at developer and architecture coverage. Legal and municipal records relating to approvals, litigation and the 2014 rulings can be found through public records and court summaries referenced at court and city documents. Current redevelopment plans for the parcel, including proposals by Related Midwest and other concepts such as the Gateway Tower, are described in local planning reports and news stories available at recent redevelopment coverage.

The Chicago Spire remains a prominent case study in large‑scale urban development: an ambitious architectural vision curtailed by macroeconomic realities, followed by legal complexity and ultimately a reimagining of the site under new ownership.