Starbucks Corp. aims to go bigger and bolder in New York City, planning to make southwest Chelsea the home of its largest store in the world.

The Seattle-based coffee retailer said Tuesday that it would set up its second roastery in a 20,000-square-foot space at the bottom of a boutique office building at 61 Ninth Ave. The massive store, expected to open in 2018, will be modeled on the company’s Seattle roastery, which the company describes as “coffee-as-theater” and a highly sensorial experience.

At the 15,000-square-foot Seattle location, where the company roasts small batches of rare coffees, customers chat with baristas to learn about the various methods of brewing and sourcing, and taste the high-end coffees.

“In New York we want to take elements from what we originally created and build something even bigger and bolder,” said Starbucks Chairman and Chief Executive Howard Schultz.

Starbucks now has 94 locations in the New York metro area that serve its Reserve coffee. The decision to bring a roastery to the city is the company’s way of distinguishing itself from the competition, said Arlene Spiegel, a Manhattan restaurant and retail consultant, who is unaffiliated with Starbucks.