Home Depot is moving on up to Manhattan. There's plenty of room for the retailer's sprawling prototype in less dense markets, but in the Big Apple, space is tight, so the home improvement giant has to to whittle its selling space down to some 50,000 square feet on two levels (from an average 130,000 square feet on one level) for its first location, set to open next year in the Flatiron District. Locally-based Newmark brokered the Flatiron deal, at 40 W. 23rd Street, pictured below. Home Depot is planning another Manhattan store in Midtown near Bloomingdale's.