Washington Redskins owner Dan Snyder is listing his Potomac, Md., mansion, inspired by an 18th Century French château, for $49 million.

Mr. Snyder is the founder of Snyder Communications, a marketing company that sold for $2.5 billion in 2000. Around the same time, he bought the riverfront property from the estate of Jordan’s King Hussein and Queen Noor, according to TTR Sotheby’s International Realty, the company listing the property. He paid about $8.64 million for the main parcel, but then expanded the property by later...