The newest condominium tower in midtown Manhattan's billionaires district is ready to open its doors to buyers. It took almost a decade to get there.

The skyscraper at 53 W. 53rd St., designed by French architect Jean Nouvel and rising next to the Museum of Modern Art, will start marketing its 139 apartments next week, with prices starting at $3 million. Planned since 2006, the project endured the real estate bust and a global financial crisis that decimated demand for luxury homes. Now it's emerging when buyers can't seem to get enough of them.

"We're very eager to begin,'' said David Penick, the New York-based managing director for developer Hines, which is building the project with Goldman Sachs Group and Singapore- based Pontiac Land Group. "We're confident in what we have to sell in the market we're in, and we'll see how it goes.''

The project's latest challenge: competing for buyers with about a half-dozen other luxury condo towers that are under construction nearby. The developments—including Vornado Realty Trust's 220 Central Park South and Aby Rosen's 100 E. 53rd St.—are transforming Midtown neighborhoods known for hotels and corporate offices into communities of wealthy people from around the world who are hungry for large living spaces and panoramic views.

It would certainly be better if there weren't so many new buildings coming on the market right now,'' Penick says at the Fifth Avenue sales gallery for the project, known as 53W53. "But I think we have a uniquely attractive package to offer."Diagonal Beams

The 1,050-foot (320-meter) tower, the size of the Chrysler Building, will rise near the corner of Sixth Avenue between 53rd and 54th streets, on land once owned by the adjacent museum. MoMA will expand its galleries in the bottom three floors of the residential building, whose signature architectural flourish is a web of diagonal concrete beams that gird the structure from the outside before tapering into a pinnacle more than 82 stories into the sky.

"It is the flag—not only of the building—but the flag of the MoMA on the skyline,'' says Nouvel, who also designed a Ferrari factory in Italy, an art museum in Abu Dhabi, and a 23- story condo building near Manhattan's Chelsea waterfront.

Unobstructed views of Central Park, five blocks away, start on the 48th story, which is where the building's larger half- floor units also begin, according to Penick and preliminary plans filed with the New York state attorney general's office. The most expensive apartment, a 6,643-square-foot (617-square- meter) duplex spanning the 81st and 82nd floors, will be priced at more than $70 million, Penick says.Skyline Views

Smaller one- and two-bedroom units on the lower floors will have views of the Midtown skyline. The least-expensive condo is a one-bedroom of about 1,450 sq. ft. on the 17th floor; it will be listed for sale at $3 million, according to Penick.

"It's not immediately on the park, so the apartments in the lower part of the building, we think, would sell better if they were not so large,'' says Penick. "Very intentionally, we sought to have a range in unit sizes."

Every apartment is shaped a little differently because the building's exterior support beams cross the floor-to-ceiling windows at various angles, Nouvel said. It made for an interesting design challenge.

"We tried to do a kind of dialogue with the views and with the buildings around,'' he says. "You frame it with different shapes in the city and the neighboring buildings."Wine Vaults

Amenities at the tower include a movie theater, a private dining room overlooking Central Park, and temperature-controlled wine vaults. Residents can buy studio apartments on the 14th through 16th floors for their personal service staff.

The project was conceived in 2006, before Houston-based Hines acquired the site from the museum for $126 million. The tower—initially planned to be 200 feet taller, about the height of the Empire State Building—was shelved amid the credit crisis, which brought property sales to a near standstill and made construction financing scarce.

In 2013, closely held Pontiac Land Group helped revive the project with a $200 million equity investment. A consortium of Asian banks provided $860 million of construction financing. Hines expects to finish construction by November 2018.

Manhattan's luxury property market has soared in recent years, with wealthy investors paying ever-higher prices for trophy homes. A duplex atop Extell Development's One57 tower sold in December for $100.5 million, a New York City record. A penthouse at Macklowe Properties and CIM Group's 432 Park Ave., the tallest residential building in the Western hemisphere at 1,397 feet, is under contract for $95 million.

While plans for 53W53 predate those transactions, the developers always intended the project to be in an elite sliver of Manhattan's luxury market, Penick says.

"The basic strategy hasn't really changed,'' he says. "It's a very attractive location adjoining the Museum of Modern Art. We always knew that it would be high end.''