Sotheby's International Realty began in 1976 as a luxury real estate network created to support independent brokerages with marketing and referral services. The company focuses on residential brokerage, property marketing, and franchise operations, connecting local real estate offices with a global client base through the Sotheby's brand. Sotheby's International Realty draws on the long-standing Sotheby's auction heritage, which positions the company within the broader luxury market. Today, the company maintains a broad presence in luxury housing markets and serves buyers and sellers through a network of affiliated brokerages and agents.