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Chicago office CMBS distress peaks as Aon Center loan defaults
A $536 million loan on Chicago’s Aon Center matured in July without repayment, leaving the tower valued far below its securitized appraisal.
Commercial Observer reports that Chicago ranks as the weakest real estate market among 11 MLB playoff metros in 2026, highlighting elevated stress in commercial mortgage-backed securities tied to office properties.
The outlet says a $536 million loan on Chicago’s Aon Center reached maturity in July and was not repaid. The tower was appraised at $824 million when the loan was securitized, and is now valued at $195 million, after a three-year extension request was denied.
According to Commercial Observer, as of August, 25.3 percent of the Chicago metropolitan statistical area’s outstanding CMBS balance was delinquent or in special servicing, the highest among the 11 metros and up 4.7 percentage points year over year.
Nationally, the report puts the CMBS distress rate at 10.9 percent in August, and notes preliminary September figures around 10.8 percent, with office making up 45.5 percent of distressed CMBS balance and an office distress rate rising to 16.0 percent.