The 20,000 square foot store will operate at The Peninsula, an affordable housing complex located on the site of the former Spofford Juvenile Detention Facility.
"We are going to use the power of government to lower prices and make it easier for New Yorkers to put food on the table," Mamdani said.
It is part of a plan for the city to run five stores, one in each borough, by the end of the mayor's first term.
Under Mamdani's plan, the city owns the land or leases space and covers the costs of construction or renovations, and a private contractor manages the daily operations where "everyday staples" will be sold at discounts.
The first store he announced was La Marqueta in East Harlem, slated to open by 2029.
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