Gibson Sotheby’s International Realty Acquires Madden Group

Acquisition of New Hampshire Brokerage Establishes Firm’s First Office Outside Massachusetts Nicole Rideout Hartwick, Larry Rideout, Jenn Madden, Colleen Barry Gibson Sotheby’s International Realty, a leading New England real estate brokerage, announced today its acquisition of Madden Group, a boutique brokerage serving New Hampshire’s Seacoast and surrounding markets, along with the opening of a new …