Real Estate

Meet the ultra-rich bigwigs dropping millions at secretive Park Ave. tower

Billionaire Frank Fertitta — a former owner of the UFC mixed-martial-arts company — made a splash last month when The Post outed him as the buyer of a $70 million penthouse at tony condo tower 520 Park Ave.

Perhaps it’s no surprise, then, that Fertitta will count two other titans as neighbors inside this Robert A.M. Stern-designed edifice, whose 62 stories are crowned by a $130 million triplex penthouse.

One of them is James Dyson, the billionaire founder of the namesake Dyson appliance company, who is in contract to purchase a 9,138-square-foot, six-bedroom duplex penthouse with a balcony, multiple sources tell The Post. The exact price he’ll pay is not yet available, but the sources add it will sell between $73 million and $83 million. It’s not far from his forthcoming 640 Fifth Ave. Dyson flagship.

The 62-story 520 Park Ave. condo tower includes tony features, like huge and high-up outdoor spaces.Zeckendorf Development LLC

The other is Bob Diamond, former CEO of Barclays, who’s nabbing a 4,628-square-foot, full-floor pad in the comparatively modest $20 million to $40 million range, our sources add. Diamond’s contract comes on the heels of the widely reported sale of his 15 Central Park West penthouse for $50.55 million.

Officials from Zeckendorf Development — which is behind this 824-foot-tall address — and its Zeckendorf Marketing LLC sales and marketing team would not comment on sales.

520 Park Ave.Zeckendorf Development/Splash

This 33-unit property has largely remained out of the spotlight after launching sales in 2015. But 520 Park made headlines again last year after the team made tweaks to the design and decided to add balconies to seven high-up units, as The Post reported.

“We can see them, but they can’t see us,” quipped developer Arthur Zeckendorf during a recent building tour, while standing on a north-facing balcony that towers over its Upper East Side neighbors. Completion is slated for the third quarter of 2018.

We hear that approximately 50 percent of units are now spoken for — mostly to a domestic crowd. The large, light-filled apartments boast grand foyers and galleries off key-locked private entries and are floored with hand-laid Appalachian white oak. Elsewhere, Christopher Peacock kitchens boast marble counters and appliances with Wolf, Sub-Zero and Miele labels. Elegant marble touches extend into master bathrooms, for instance, with large slabs of stone.

Owners also get access to about 30,000 square feet of amenities. They include an outdoor garden off the lobby, a two-level health club and a pool located under a vaulted ceiling and surrounded by hand-carved marble wall ornaments.

It’s quite the package for just 33 homes.

“It’s the concept of a boutique building, but those don’t have all these amenities,” adds Arthur, who runs Zeckendorf Development with his brother William.

Arthur and William Lie ZeckendorfAstrid Stawiarz