About Gibson Sotheby's International Realty

Opening Doors Is What We Do...

Gibson Sotheby’s International Realty is Boston’s largest independent real estate company.  Founded in 1962 by Betty Gibson in Boston’s South End, our franchise maintains offices in Charlestown, the North End/Waterfront, the Back Bay, the South End (2), Dorchester and Cambridge.  GSIR recently acquired offices on the South Shore and Cape Cod, which gives us 300 agents in Eastern Massachusetts.  We work closely with each member of our network to garner the best possible exposure for your property. Internationally, there are more than 20,000 sales associates with approximately 880  Sotheby’s International Realty offices in 69 countries and territories. In  2018 we moved to a state of the art 4000 sf office at 20 City Square located across from historic City  and beautiful Square Park.