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Why Daniel Kay Hertz started counting Chicago five-story buildings

Housing researcher’s curiosity uncovers trend in apartment development heights
The Ash, a five-story apartment building in Chicago’s Wicker Park neighborhood developed by Noah Properties, reflects a development trend that housing researcher Daniel Kay Hertz found has become common across the city. (Brett Bulthuis/CoStar)
The Ash, a five-story apartment building in Chicago’s Wicker Park neighborhood developed by Noah Properties, reflects a development trend that housing researcher Daniel Kay Hertz found has become common across the city. (Brett Bulthuis/CoStar)
CoStar News
August 31, 2026 | 9:25 P.M.

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Around the Chicago apartment building where he lived, Daniel Kay Hertz began noticing something: New apartment developments seemed to be getting taller.

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