That a $6.9 million unit at the Thomas Juul-Hansen-designed 505 W. 19th St. that Jessica Alba and pro-golfer Rory McIlroy both toured is now in contract, snapped up a mystery buyer.

The apartment, built for one-percenters, is uniquely populist. From the living room, the owner will be at eye level with the throngs of tourists that walk the High Line each day.

“Instead of turning our backs to the High Line, like other developers, we embraced it,” Juul-Hansen told Gimme Shelter.

The windows can be cleaned every week — something that is not an option for billionaires in skyscrapers like One57, where Juul-Hansen designed the interiors.