The real estate mogul brought an easygoing mix of antiques, pattern, and personal treasures—even a custom Scrabble table—to the decidedly Uptown penthouse

“There were some things that we thought we were going to change and ended up keeping, like the wood paneling in the library, which was definitely the right call,” says Eifler of the cozy retreat, where Corcoran relaxes with family, friends, and Max. A 1929 handwoven Swedish Rya rug, a prized find from Doris Leslie Blau in NYC, echoes the colors of framed artwork that once hung in Corcoran’s conference room. An Avery Boardman sofa bed wears a Pierre Frey fabric and is flanked by side tables from The Lacquer Company . The drapery is in an Ian Mankin textile and the custom leather ottoman is by Gerardo Gonzalez Upholstery. DIANA HASKELL PHOTOGRAPHY

It takes a special apartment to make Barbara Corcoran outbid herself.…