In 2005 Browns Real Estate, owned by Julian Brown and Mark Harris, became part of the Sotheby's International Realty network after searching for the worlds best luxury residential property brand. On the 1st of September 2021 Sissons Real Estate owned by Jonathan and Tony Sissons became part of the Sotheby’s International Realty ® network. New Zealand Sotheby’s International Realty has subsequently achieved record sale prices across multiple sectors and regions of the New Zealand property market.