A groundbreaking was held Thursday in the city of Yonkers for the biggest development that Westchester County has ever seen.

Extell Development is pouring half a billion dollars into the last remaining piece of undeveloped waterfront property in Yonkers to turn it into Hudson Piers.

"Hudson Piers will be one of the most transformative developments that this city has seen. It's a crowning jewel of this unprecedented development along our seashore," says Yonkers Mayor Mike Spano.

There will be seven buildings, and about 1,400 luxury apartments. Ten percent of those apartments are earmarked for affordable housing. A variety of retail establishments are also planned.

While Hudson Piers will create an unbroken 1.5 miles of riverfront esplanade, plans don't end there.

"It's connecting our river walk from the South Port so we can go from the Sugar House and eventually, as the mayor knows, we're going to go from the Bronx border right up to the Putnam border where everyone can understand the beauty of the Hudson River," says Westchester Deputy County Executive Ken Jenkins.

It will also have some other added benefits.

"It's going to create dozens of jobs, long-term well-paying jobs, besides the construction jobs, but these will be good jobs and will be in the buildings and the retail and were certainly going to give priority to local people first," says Gary Barnett, founder of Extell Developments.