Buy property in the Henley-on-Thames area through United Kingdom Sotheby's International Realty estate agents (http://www.sothebysrealty.co.uk/forsaleoffice/Henley-on-Thames/1899/), Hart Street, Henley-on-Thames RG9 2AU - Telephone 01491 693 834. United Kingdom Sotheby's International Realty estate agents are part of the Countrywide Group with thousands of UK properties for sale.