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What’s a multifamily conversion worth? This Chicago deal may help provide an answer.

Sale comes as developers nationwide remake outdated office buildings
Paper Box Lofts, a vintage office building converted to 35 apartments, has sold for $19.2 million. (Robert Gigliotti/CoStar)
Paper Box Lofts, a vintage office building converted to 35 apartments, has sold for $19.2 million. (Robert Gigliotti/CoStar)
CoStar News
September 21, 2026 | 12:23 AM

An investor did more than just pay about $19 million this month for a Chicago building that was switched from loft offices to apartments. The buyer provided an early sale price for a completed office-to-apartment conversion as these projects gain traction nationwide.

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