Notable Sale: Sagaponack Gwathmey House Sells for $20 Million

An 8,000-square-foot Sagaponack house designed by Charles Gwathmey, a modernist architect who left a legacy of chic boxes throughout the South Fork, was sold in February for $20 million, as recorded in recent deed transfers. The house wasn’t officially on the market, as the owners were waiting to finish a house they are building nearby, according to the selling agent, Corcoran’s Susan Breitenbach.

The seven-bedroom, 11 1/2-bath, shingled house, surrouding a courtyard at 733 Daniel’s Lane, was capped with a copper roof and round turret to resemble a barn, a reference to the agricultural landscape. Not oceanfront, it has deeded access to the beach.

The sellers were Jonathan Sobel, a former Goldman Sachs executive, and his wife, Marcia Dunn, a physician. The couple purchased the property in 2003, according to an article in the Wall Street Journal, for $2.575 million. Mr. Gwathmey built both the house and its furnishings, which were included in the sale, before his death in 2009.