JPMorgan Chase & Co. plans to build a new 2.5 million square-foot headquarters at 270 Park Ave. in New York City, the first major project under a city rezoning plan designed to rejuvenate the building stock in one of its biggest job centers.

The newbuilding would replace the bank’s current 1.5 million square-foot headquarters at the same address and consolidate offices in various places throughout Midtown Manhattan, the bank and city officials said Wednesday.

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