The Chicago Chase Building, standing prominently at 10 South Dearborn Street, represents one of the most daring architectural statements in the Midwest. Known officially as Chase Tower, this 60-story skyscraper remains the tallest structure inside the Chicago 'L' Loop elevated tracks. Rising 850 feet into the air, its most defining characteristic is the sweeping vertical curve that recedes over 100 feet from the base to the summit. This design choice, while aesthetically striking, serves a functional purpose, allowing for larger floor plates at the base for retail and banking operations while tapering to a slender profile for premium office space above. As of early 2026, the building is completing a monumental multi-year renovation that bridges its mid-century origins with the demands of the modern, flexible workforce.

The architecture of the curve

Completed in 1969, the Chicago Chase Building was the collaborative work of C.F. Murphy Associates, Stanislaw Z. Gladych, and Perkins & Will. At the time of its completion, it was a marvel of reinforced concrete and steel construction. The International Style influence is evident in its clean lines, yet the inward-sweeping curve sets it apart from the rigid boxes of its contemporaries. The facade is vertically divided by eight massive structural pillars clad in light-grey marble, which run the entire height of the building, providing a sense of immense strength and continuity.

Technically, the building utilizes a window wall system that integrates structural elements directly into the exterior design. This means the facade is not merely a curtain hanging from the frame but is part of the load-bearing logic of the tower. The sloping silhouette creates a unique interior experience; as one moves to higher floors, the perimeter walls lean inward, offering dramatic views of the surrounding Loop architecture while maintaining a sense of intimacy within the office environment.

From the Morrison Hotel to a financial powerhouse

The site of the Chicago Chase Building has always been a hub of activity. Before the tower rose, it was occupied by the Morrison Hotel, which was demolished in 1965 to make way for the new headquarters of the First National Bank of Chicago. Upon its opening in 1969, the building was known as First National Plaza. Over the decades, as the financial industry consolidated, the building's name evolved. In 1998, it became Bank One Tower following a corporate merger, and on October 24, 2005, it officially took the name Chase Tower after JPMorgan Chase acquired Bank One.

Despite the name changes, the building’s role as an economic anchor for Chicago has never wavered. It currently serves as the retail and commercial banking headquarters for JPMorgan Chase in the U.S. and Canada. The building is also the headquarters for Exelon, a major energy provider. This concentration of corporate power within a single block—bounded by Clark, Dearborn, Madison, and Monroe streets—reinforces the building's status as the literal heart of Chicago’s financial district.

The 2024-2026 modernization project

By the early 2020s, it was clear that even an icon needs an upgrade. JPMorgan Chase launched a massive renovation project in 2024, the first significant overhaul in over twenty years. The goal was to transform the 55-year-old tower into a sustainable, state-of-the-art workplace. This renovation, which has phased into completion by 2026, focuses on several key areas: hospitality, wellness, and technology.

A new standard for workplace hospitality

The lobby and mezzanine levels have undergone a total transformation. The entrance experience was modernized to be more transparent and welcoming, featuring a refreshed food hall and mezzanine common spaces. These areas are designed for more than just a quick lunch; they are collaborative zones equipped with robust café experiences, intended to facilitate the "third space" work style where employees can meet outside of traditional cubicles. The project also included a complete renovation of the building’s 55 elevators. Utilizing "destination dispatch" technology, the new system optimizes travel times by grouping passengers based on their destination floor, significantly reducing wait times during peak hours.

Health and wellness at the core

In a shift reflecting post-pandemic office priorities, the Chicago Chase Building now features a world-class fitness center on the lobby level. This isn't just a gym; it includes dedicated yoga and cycling rooms, prayer and meditation spaces, and wellness areas designed to support the mental and physical health of the 7,200 employees stationed there. By placing these amenities in high-visibility areas, the firm has signaled a move toward a more holistic view of the workday.

Sustainability and LEED goals

The renovation was designed with LEED certification in mind. Sustainability initiatives include the installation of carbon-neutral carpets across nearly half a million square feet of office space. Plumbing fixtures were upgraded to high-efficiency models, targeted to reduce net water use by 35%. Furthermore, the construction utilized low-embodied carbon materials, ensuring that the modernization process itself had a minimized environmental footprint. These upgrades suggest a long-term commitment to maintaining the tower as a top-tier, environmentally responsible asset in the city's portfolio.

Exelon Plaza and the Four Seasons

The public space surrounding the Chicago Chase Building is as famous as the tower itself. Known as Exelon Plaza (formerly First National Plaza), it is a deep sunken area that provides a retreat from the bustling street level. The plaza’s centerpiece is Marc Chagall’s "Four Seasons," a massive ceramic wall mural that is one of Chicago’s most treasured pieces of public art.

Measuring 70 feet long and 14 feet high, the mosaic features thousands of glass and stone tesserae. As part of the recent renovation, access to the mural and the overall plaza experience was improved. The plaza now features enhanced landscaping, a covered canopy, and more accessible seating areas. This space continues to serve as the geographic center of the Loop, a place where workers, tourists, and residents converge. The jet fountain and the vibrant colors of the Chagall mosaic offer a stark, beautiful contrast to the grey marble and glass of the surrounding skyscrapers.

The economic impact of the Chicago Chase Building

JPMorgan Chase is one of Chicago’s largest private employers, and this building is the nexus of that influence. A study conducted by Deloitte highlighted the firm's contribution of approximately $4.9 billion annually to the local economy. The renovation project itself created nearly 1,000 local construction jobs, with a significant percentage of contract awards going to minority and women-owned businesses.

While the building is a hub for high-finance and corporate strategy, it also maintains a strong retail presence. The ground floor houses the largest Chase bank branch in the city, featuring 22 ATMs and a full suite of retail banking services. For many Chicagoans, the building is the face of their financial lives, whether they are visiting the auditorium for a corporate event or simply crossing the plaza on their way to the 'L' train.

Looking ahead: The tower in the 2026 landscape

As the final phases of the renovation conclude in 2026, the Chicago Chase Building stands as a model for how legacy skyscrapers can adapt to the future. It remains the fourteenth-tallest building in the city, but its relevance isn't measured solely in feet or meters. It is measured by its ability to provide a high-tech, healthy, and sustainable environment for thousands of workers while preserving the architectural heritage that makes Chicago's skyline world-renowned.

The unique curving silhouette—that "vertical smile"—continues to be a landmark for navigation and a symbol of the city's post-war ambition. With its updated infrastructure and a renewed focus on public engagement through its plaza and art, the tower is well-positioned for its next half-century. Whether you are an architecture enthusiast admiring the marble pillars or a professional utilizing the new meditation rooms, the Chicago Chase Building remains a vital, evolving part of the urban fabric.