By Mark Heschmeyer CoStar News
This week’s CMBS Notebook looks at an office stress test playing out along Philadelphia's Market Street.
One Philadelphia corridor, four troubled office bets: Four prominent office properties along a four-block stretch of Philadelphia’s Market Street illustrate the ongoing pressure weighing on the sector in the central business district.
The buildings — 1818, 1700, 1500 and 1515 Market St. — sit within Philadelphia’s Market Street West corridor, where vacancy has risen to 24.3% and demand has weakened since the pandemic, according to CoStar analysis. Collectively, the four properties, totaling 3.7 million square feet of office space, back $836.1 million in commercial mortgage-backed debt.
Among them, 1818 Market is facing some of the steepest challenges. The property’s latest appraisal valued the tower at $158 million, down 44% from its $282.1 million valuation when its loan was originated in 2021, according to Morningstar Credit. The 37-story, roughly 1 million-square-foot office building transferred to special servicing in 2023 after the borrower sought a loan modification. The asset has since entered receivership, and servicers are evaluating liquidation options. Market observers, however, say any sale process could wait until nearby Market Street properties are resolved.
A few blocks east, 1700 Market also has seen its value erode, though its workout process appears further along. The building’s latest appraisal was $168 million, 31% below its value at loan origination, according to Morningstar Credit. The 850,000-square-foot office tower and parking garage transferred to special servicing in 2023 ahead of a looming maturity default. A court-appointed receiver has been marketing the property, and servicer commentary suggests a sale could take place before the end of 2026.
Both 1700 Market and 1818 Market are owned by Shorenstein Properties but are being operated by court-appointed receivers, according to CMBS servicer commentary. Shorenstein declined to comment.
Meanwhile, 1500 Market remains tied up in a lengthy foreclosure and sale process. A planned acquisition fell apart when winning bidder CSC Coliving withdrew its $80 million offer, citing concerns about the economics of Philadelphia’s tax-abatement program, according to a report from The Philadelphia Inquirer.
The two-tower, 1.8 million-square-foot complex has been under receivership since 2023 and was just 34.4% occupied as of March 2026, according to CMBS servicer commentary from Keycorp Real Estate Capital Markets. CBRE has served as the court-appointed receiver since May 2023. CBRE did not respond to a request for comment.
The relative bright spot is 1515 Market. The property recently received a loan modification that extended its debt maturity to 2027 and included a $7 million borrower equity contribution, according to Morningstar Credit. Even so, the 502,000-square-foot office building faces headwinds of its own, including Temple University’s planned departure in June 2027.
Building owner Accesso Partners did not respond to a request for comment.

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