Stone Chateau in Northern N.J. Sells for US$17.7 Million, the State’s Biggest Home Sale in Three Years
The custom megamansion is located in the affluent town of Alpine, not far from New York City.
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A Versailles-style chateau in Alpine, New Jersey, has just been sold for US$17.7 million, the state’s highest home sale in the past three years.
The sale of the custom megamansion, which closed Tuesday, is also the highest-priced in the affluent town and in the Rio Vista neighbourhood since January 2022.
David and Mindy Kwon bought the vacant Bergen County land in 2011 for $3.95 million, according to records on Property Shark. They declined to comment on the sale.
The Kwons spent four years building their dream house, which they christened Chateau de la Roche for the boulder that had to be blasted out of the ground before the project could commence.
Designed by Zampolin & Associates Architects, the cast stone, limestone and travertine residence presides over 2 acres.
The interiors are by Denise Albanese, who, in her dual role as realtor associate at the Christie’s Mahwah-Saddle River Sales Gallery, also represented the Kwons in the sale.
“Among the luxury homes in Rio Vista, Chateau de la Roche is the cream of the crop,” she said. “It’s one of the most elegant—there’s a general feeling of grandeur and luxury.”
The seven-bedroom, 10.5-bath house, which was completed in 2017, is palatial enough to suit royalty.
The 25,700-square-foot house, which is about a half hour from Manhattan, has a 15-seat theatre, an elevator, a gas fireplace, a billiards room, two bars, a wine cellar, two indoor plunge pools, a sauna, a steam room, a conservatory and a central-vacuuming system.
Other features include a grand central staircase illuminated by a massive crystal chandelier, a great room warmed by a mammoth fireplace, a conservatory, a mezzanine and an ornately wood-panelled library with a fireplace. The garage can accommodate four vehicles.
Outside, there’s a resort-style swimming pool and a spa.
It’s the details, Albanese said, that set the chateau apart.
“It has soaring ceilings, custom fireplaces and bridal staircases,” she said. “In one of the powder rooms, there is glass-beaded wallpaper.”
Mansion Global could not immediately confirm the identity of the buyer, who was represented by Richard Orlando and Jason Pierce of Prominent Properties Sotheby’s International Realty and Taylor Lucyk of Christie’s International Real Estate Group
Albanese said that the Kwons, who own several other homes, are downsizing.
The transaction, she said, was a “full-circle moment for me as an interior designer and real estate agent. It’s a little sad to see the chateau go, but I’m already working with the sellers on their next interior design and real estate venture.”
Kwon is the corporate vice president and chief legal officer of ADP (Automatic Data Processing), a Roseland, New Jersey., company that provides human resources management software services. And he’s a trustee on the board of SEEDS, a New Jersey-based nonprofit that helps high-achieving students from low-income families.
Chateau de la Roche was originally put up for sale in 2021 for $25 million. Since 2023, the asking price has been $22.49 million.
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The 1860s Darlinghurst mansion Stoneleigh could become Sydney’s most expensive home ever sold under the hammer when it goes to auction. Clint Ballard is giving buyers a $28 million guide for the heritage-listed mansion on Darley Street, opposite Iona, the former home of Hollywood royalty Baz Luhrmann. Stoneleigh is being offered for sale for the …
Set on one of the city’s last absolute riverfront sites, The Riversdale by Mosaic combines irreplaceable waterfront ownership with one of Brisbane’s most significant residential opportunities.
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At the northern tip of Point Piper, hidden from the street and positioned directly on Sydney Harbour, “Radford” combines cinematic views, rare waterfront access and a fascinating connection to one of Australia’s most storied estates.
The five-bedroom residence occupies land once belonging to Paradis Sur Mer, the celebrated three-block waterfront estate that made Australian property history in 1982. The original mansion became the country’s first home reported to have sold for more than $5 million—and may also have inspired one of its fastest and most profitable resales.
Property developer and yachtsman Bernard Lewis purchased the estate at auction for $5.25 million, only to sell it within hours to English betting magnate and thoroughbred breeder Robert Sangster. Lewis reportedly made a $500,000 profit in the process.
Sangster renamed the property Toison D’Or—French for “Golden Fleece” and the name of one of his racehorses—and established it as a Sydney base with his then-wife, Susan. The estate subsequently changed hands and identities again, becoming Paradis Sur Mer, or “Paradise on the Sea”, during Susan’s marriage to financier Sir Frank Renouf.
After another headline-making sale near the peak of Sydney’s late-1980s property boom, the original mansion was eventually demolished and the waterfront holding subdivided. “Radford” now stands on one of those prized parcels, carrying a thread of that extraordinary history into the present day.
Harbour views take centre stage
Designed by award-winning architect Victor Berk and constructed in the early 1990s, the three-level modernist residence has been planned around its exceptional position.
Panoramic views stretch from the Sydney Harbour Bridge across Shark Island and Rose Bay to Manly. A prized northerly aspect fills the home with natural light, while bedrooms and living spaces open to decks, balconies and terraces overlooking the water.
The main living areas flow to a broad alfresco entertaining terrace, sunny swimming pool and level harbourfront lawn. Beyond the garden, a private jetty completes the quintessential Sydney waterfront lifestyle.
Inside, generous proportions make the home equally suited to private family life and large-scale entertaining. The formal dining area can accommodate up to 14 guests, while a Gaggenau-appointed kitchen incorporates an island, walk-in pantry and casual breakfast area opening to the poolside deck.
A fireplace anchors the principal living space, complemented by high ceilings, travertine floors and expansive glazing that keeps the harbour present throughout the home.
A private sanctuary on every level
The main bedroom is accompanied by two walk-in wardrobes, a sitting area and an ensuite featuring a spa bath, separate shower and twin basins. Three further bedrooms each have an ensuite, while a gym with its own kitchenette, built-in storage and bathroom can serve as a fifth bedroom or private guest retreat.
Additional spaces include a fitted home office, an upper-level family area, sauna, two powder rooms and a substantial laundry. A lift connects all three levels, and the central staircase sits beneath an atrium-style glass roof fitted with an electric retractable blind.
Ducted and zoned air-conditioning, extensive storage and a security alarm add everyday practicality. Internal access leads to an oversized secure double garage, with additional driveway parking.
Set in an elite cul-de-sac on one of Australia’s most prestigious waterfront streets, “Radford” is close to Lady Martins Beach, Prince Edward Yacht Club, the Royal Motor Yacht Club, Rose Bay’s marinas and leading schools. Double Bay’s restaurants, boutiques and village amenities are only minutes away.
It is an exceptional harbourfront residence in its own right—but its connection to the record-breaking Paradis Sur Mer estate gives it a place within the wider story of Sydney real estate.
Property details
Address: Wolseley Road, Point Piper, NSW
Bedrooms: Five, including a flexible gym or guest suite
Bathrooms: Five, plus two powder rooms
Parking: Oversized double garage and additional driveway space
Key features: Northerly aspect, panoramic harbour views, private jetty, swimming pool, level waterfront lawn, lift, sauna, home office and Gaggenau kitchen
Architect: Victor Berk
Agents: Michael Pallier, Sydney Sotheby’s & Brad Pillinger, Pillinger
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