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Part of Chicago office tower could become luxury hotel after discounted sale

Prime Group buys Helmut Jahn-designed building for $24 million
Prime Group has acquired the 40-story Chicago office tower at 55 W. Monroe St. It is across the street from Chase Tower, seen at right. (Robert Gigliotti/CoStar)
Prime Group has acquired the 40-story Chicago office tower at 55 W. Monroe St. It is across the street from Chase Tower, seen at right. (Robert Gigliotti/CoStar)
CoStar News
July 15, 2026 | 2:46 P.M.

A Chicago real estate firm known for redeveloping outdated office buildings has bought a 40-story, Helmut Jahn-designed tower in the Loop business district with plans to potentially convert lower floors into a luxury hotel.

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