Developer Larry Silverstein announced plans today to build the tallest residential building in New York at 99 Church St., just two blocks from the former World Trade Center site.

The 80-story limestone building, designed by architect Robert A.M. Stern, will contain 143 luxury condominiums and a Four Seasons Hotel. The hotel will occupy the first 22 floors of the structure and consist of 175 rooms. The building will be completed in 2010, Mr. Silverstein said.

The hotel lobby will be on Barclay Street and the hotel will offer four floors of amenities space including lounges, a ballroom, meeting spaces, a spa, fitness center, and pool. The residents’ lobby will be located at 30 Park Pl. and there will be a public plaza on the east side of the building linking Park Place and Barclay Street.

“Larry and I wanted it to be different from the Trade Center. It’s not an office building it should be elegant and I think we made a building that is also distinguishes itself different from the Battery Park city buildings,” Mr. Stern said. “This will be a unique building.”

During his comments, Mr. Silverstein touted the turnaround of Lower Manhattan.

“What’s going on downtown is more than a market cycle, it’s a permanent transformation in all sectors — commercial, residential, retail, and tourism,” he said. “The sheer breadth and diversity of the new downtown economy makes it more durable and more lasting than at any point in its history.”

Mr. Silverstein expressed concern about the Metropolitan Transportation Authority’s decision to reduce plans for the Fulton Street Transit Center, which is set to be constructed just blocks away 99 Church St.

“There is not a question in my mind the Broadway-Fulton stop needs a complete and total re-building and we all need to work assiduously as we can with MTA to make sure that that project goes forward. It is terribly important to the region,” he said.