Brian Steinwurtzel’s grandfather built a real estate dynasty turning old West Side warehouses into office buildings.  Some seven decades later, Steinwurtzel is following the family tradition by converting outdated office buildings into apartments. The 49-year-old has been heading up GFP Real Estate’s developments for the past 13 years. In April, the Gural family spun out the resi-conversion side of the business into GFP Development, naming Steinwurtzel the new entity’s CEO. In recent years, he’s run projects like SoMA — the conversion of the Brutalist-styled 25 Water Street office building into 1,300 rental apartments. He’s also turning the 31-story office tower […]

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