In 1967 Fitzgerald was elected to the ACT Advisory Council as a "True Whig", promising to take no action as a mock platform. He was re-elected in 1970, with 21% of the vote, ahead of the Liberal Party candidates and second only to the Labor Party (ALP) team. For many years, Fitzgerald was a member and chairman of the ACT Historic Sites and Building Committee (later renamed the Heritage Council), a body that had been established at his initiative. The Committee sought to protect historic homesteads and buildings, during a time when Canberra was rapidly being extended into surrounding rural areas.