Google Hudson Square, as it will be called, will host the firm's Global Business Organization.
Google already has a big presence in NY with over 7,000 employees located there working on its Search, Ads, Maps, YouTube, Cloud, Technical Infrastructure, Sales, Partnerships, and Research teams.
Google has announced plans to double its NY offices with a $1 billion investment.
Last month, Amazon.com said it would open offices in NY and the Washington, D.C. area, creating more than 25,000 jobs.
And fitting in with a vibrant city is part of what makes NY attractive to tech firms, along with a good amount of local talent and that whole finance-capital-of-the-world thing. The company already has more than 7,000 employees in the city.
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The outer wall is a melange of chocolate brown shades interspersed with streaks of glass and the roof sports a creamy white hue. Marcuss Harris (36) and Aaron Finch (28) were at the crease when the lunch was declared.
The Google NYC expansion comes as other tech giants from the west coast start moving eastward. The company employs about 7,000 people in NY.
Google has also spent $2.4bn.
The move is the latest high-profile expansion from a USA tech giant, following big investments from Apple and Amazon to create new office spaces in New York, Washington, D.C., and Texas.
The news comes on the heels of Amazon.com picking NY as its second headquarters.
Tech companies are "coming to the realization that the Bay Area, which has traditionally been the major centre of tech activity in the USA, is getting expensive and crowded", said Andrew Bartels, principal analyst at Forrester Research.
"When we came to New York City nearly two decades ago, it was our first office outside of California", said Google's Senior Vice President and CFO Ruth Porat in a blog post. And the company is also investing in other parts o the US - the blog post notes the company opened new offices and data centers in a number of locations this year, including Detroit, Boulder, Los Angeles, Tennessee and Alabama.