In 1874 Burt accepted a nominated membership of the Western Australian Legislative Council. In 1879 he relinquished that nominee membership, and in the general election of 1880 was elected unopposed for the district of Murray and Williams. In March 1886 Burt resigned from his seat on the Legislative Council to accept the position of Acting Attorney-General after the sudden resignation of the incumbent Alfred Hensman. Burt remained as Attorney-General until December 1886. In 1887 Burt was appointed one of Western Australia’s two representatives to the First Colonial Conference in London. He was also appointed Queen's Counsel. In May 1888 Burt contested a by-election for the Perth seat in the Legislative Council, but lost to John Horgan. In July of that year, he was elected to the Legislative Council's North District seat. When Western Australia gained self-government in 1890, he was elected unopposed as the inaugural Legislative Assembly member for Ashburton, and held that seat until he retired from politics in 1900. During this time he was Attorney General, was Acting Premier when the leader, Sir John Forrest, was absent from the State, and was responsible for the creation of the Western Australian Agent-General's office in London and acted in that position from 1891-1892. Sir Malcolm Fraser KCMG took over in 1892 as the official Agent General for Western Australia. Burt was also a member of the Executive Council. He also served as "Minister without portfolio" from 1897-1900. From 1881 to 1889, Burt was a member of the Perth City Council.
Pastoral interests
In 1877 Burt formed a syndicate with John, Alexander and David Forrest and took up a lease of land on the Ashburton River. This lease became known as Minderoo Station. He was also owner or part-owner of other properties, including Kadji Kadji, Brick House, Yinnetharra, Red Hill, Gifford Creek and Minne Creek. The syndicate was dissolved in later years, with the families taking separate ownership of the properties.
Personal life
Burt married Louisa Fanny Hare in 1872. The couple had ten children. He was a synodsman, trustee and legal advisor for the Church of England, and a close friend of Archbishop Charles Riley. In 1917 Burt and his wife funded and donated to the Church the Burt Memorial Hall on St Georges Terrace, as a memorial to their two sons killed during. Initially it was to commemorate their son Theodore, who died in 1917, but a second son, Francis, was killed in 1918 before the construction was complete. Burt was captain of the Perth Cricketers in 1871, president of the Carnarvon Club 1917-1918, and a foundation member of the Weld Club.
