Mag Mile Office Tower Conversion Lands $113M Package

JLL Capital Markets arranged about $113 million in financing and joint venture equity for a 500 North Michigan Avenue office-to-apartment conversion in downtown Chicago.

Real Estate  ·  September 22, 2026

What Happened

JLL Capital Markets announced that it arranged about $113 million in construction financing and joint venture equity for the planned conversion of 500 North Michigan Avenue in downtown Chicago from office space into residential apartments.

The 25-story building sits along the Magnificent Mile corridor. According to JLL and corroborating commercial real estate coverage, the project is expected to deliver 320 luxury apartments and is being advanced on behalf of Commonwealth Development Partners.

Why It Matters For Chicago-Area Real Estate

The financing package is notable because office-to-residential conversions can be difficult to execute. They often require a mix of construction capital, investor participation, design changes, permitting work and confidence that the finished apartments will meet market demand.

For readers in Schaumburg and the broader Chicago metro area, the project is another example of how downtown Chicago property owners and developers are responding to shifting office-use patterns. While this project is specific to the Magnificent Mile, high-profile downtown redevelopment can influence how investors, lenders and local officials think about older office properties across the region.

What The Evidence Shows

The central facts come from JLL’s September 21, 2026 announcement. JLL said it arranged approximately $113 million in construction financing and joint venture equity for the 500 North Michigan Avenue conversion. Industry outlets including REBusinessOnline, Institutional Real Estate, Inc. and Commercial Observer reported the same core transaction details.

The available reporting confirms the project location, the 25-story building description, the planned residential use and the expected 320-unit apartment count. Commercial Observer also identified Santander Bank and Washington Capital in connection with the debt package and noted JLL’s role as arranging broker.

What Is Still Unclear

Several details were not specified in the research brief. The exact split between debt and equity was not provided, and the summaries did not include a full unit mix, expected rental levels or a final construction timeline.

As with any major conversion, execution will depend on factors such as construction conditions, permitting, design feasibility and local apartment-market demand. The financing announcement is an important milestone, but it does not by itself answer every question about project timing or final economics.

How To Read This Kind Of Deal

In commercial real estate, a construction financing and equity package generally indicates that a project has moved beyond early concept work and has secured capital needed for development activity. It does not mean the project is complete, fully leased or free of risk.

Office-to-residential projects can also vary widely. Some buildings are easier to adapt than others depending on floorplate size, window access, mechanical systems and local code requirements. Those technical details are not included in the verified summaries for this specific project.

This article is for general educational purposes only and is not medical, financial, legal or real estate advice. Readers should talk with their doctor or another qualified provider about their own health. In an emergency, call 911.

This article is an original summary based on information published by JLL Capital Markets, REBusinessOnline, Institutional Real Estate, Inc. and Commercial Observer.

Sources

• https://www.jll.com/en-us/newsroom/jll-secured-113m-for-landmark-office-to-resi-conversion
• https://rebusinessonline.com/jll-arranges-113m-in-financing-for-office-to-residential-conversion-project-in-downtown-chicago/
• https://irei.com/news/113m-secured-for-office-to-residential-conversion-on-chicagos-mag-mile/
• https://commercialobserver.com/2026/09/santander-bank-washington-capital-113m-chicago-office-conversion/