George Hart was born into a modest farm family in rural New Hampshire. The youngest of six children of Edward and Sally Hart, one older brother
died in infancy and his two oldest sisters
died of tuberculosis by the time he was 15. Perhaps these early losses forced him to grow up quickly; he got into the lumber business at a young age. By 18, he had built his first lumber mill and by his late 20s, he owned three lumber mills in New Hampshire.
At 27, he married his first wife, Ita Belle Carter, a 21 year-old music teacher. A couple years later, he sold off his mills and he, Ita, and his older brother, John Fox Hart, would move out to Washington state. There he started more lumber mills, with he and his brother also starting the Tacoma & Eastern Railroad Company, which they used to transport the timber.
He seemed to build on his success and fortune during his five years in Washington, although not without controversy. The newspapers wrote about one of his mills burning down: rumors of arson, and a well-publicized lawsuit with the insurance company, which he eventually won. He and Ita split while living in Washington; she returned home to New England.
Perhaps looking for a new challenge, Hart moved to Oakland in 1896 and got into the real estate business. He made his way to Los Angeles by 1900 and got into business with Henry Huntington, whose Pacific Electric Railway would figure into his plans for Corona del Mar. In 1903, he married May Evelyn Guertin, possibly meeting her on one of his trips back East to visit family, as she was living in Fall River, Massachusetts at the time.