For over 25 years CENTURY 21 Cityside has been a celebrated office in downtown Boston, winning CENTURY 21 International’s Centurion award between 1986 and 2007. We are connected to 147,900 CENTURY 21® professionals in 45 countries worldwide. We provide the benefits of the foremost global brand in real estate, the power of local market knowledge, and the very latest in technology. From our Back Bay location, we sell homes, condos and investment properties in the South End, Beacon Hill, Waterfront, Downtown, South Boston, Jamaica Plain, Cambridge and Brookline, and all other neighborhoods near downtown Boston.