Wilzig Castle

Siggi Wilzig was a banker who served as chairman and chief executive of the Trust Company of New Jersey. His sons, Alan and Ivan Wilzig, bought a hilltop in the woods north of Water Mill, a hamlet in the Town of Southampton, and built a house there as partners. Ivan Wilzig, known as Sir Ivan, became its best-known occupant, and the house is often called Sir Ivan's Castle.

The published dates differ slightly. A Wikipedia biography of Alan Wilzig says construction began in 1996, and a 2021 Dan's Papers article says the castle was built around 1998. A 2014 Dan's Papers article reports that the property covers five acres, names Mark Jones as the builder who worked with the brothers and with Karen Wilzig, and says the whole project cost less than $5 million. Dan's Papers gives the size as about 14,000 square feet, while a Wikipedia biography of Ivan Wilzig gives 15,000 square feet.

The house is a modern building made to look like a European medieval castle. Press descriptions mention turrets, a throne room, a grand staircase, a room styled as a dungeon, themed guest rooms, and steel entrance gates about 10 feet tall. Its wings enclose a courtyard with a swimming pool and an ornamental fountain, and the grounds include courts for tennis, volleyball and basketball. The house was featured on the Destination America series Epic Castles.

According to Dan's Papers, Siggi Wilzig used the castle as a quiet retreat around 2002, and he died a few years later. The ownership history after that is not clear from published sources. Alan Wilzig's Wikipedia biography says he sold his half to Ivan in 2003 and went on living in the house, while the 2021 Dan's Papers article quotes Alan as planning to sell his half to Ivan. Searches made for this entry in October 2026 found no report of a sale or a listing.

Wilzig Castle is not a Gold Coast mansion. It is a late twentieth-century house on the South Fork, in the Hamptons, far from the North Shore estates that this site covers, and the old goldcoastmansions.com site listed it under Southampton, which is the town that contains Water Mill. It is a private home. It is not open to the public, and this entry gives no street address.