[3] He was appointed Justice of the Peace in 1863[9] He was a member of Everard was elected to the South Australian House of Assembly for the district of Encounter Bay on 6 March 1865,[13] succeeding John Lindsay, along with David Sutherland.
Fourteen months later, Everard was elected a member of the Legislative Council, in company with Sir Henry Ayers, Alexander Hay, T. Hogarth, J. Fisher, R. A. Tarlton, and Walter Duffield, and continued as one of the eighteen members of the Upper House, who were elected by the whole province acting as one electoral district, until he vacated his seat on 1 August 1878.
Their home was "Marshfield", a property of 150 acres (61 ha) on the east side of Bay Road (originally owned by Dr. C. G. Everard).
His children William Francis (1855–1915), Eliza Catherine (1857–1966) and Rosa Maria (1860–1935) inherited Marshfield, progressively selling off sections to support themselves.
By 1908 the two sisters had been declared insolvent; William Francis Everard's widow disposed of what remained of his share, now a large part of the suburb of Keswick.