"[7] To complete his commission, Kitching employed 15 students from the UNSW College of Fine Arts working to produce all the artworks in the studio of painter John Firth-Smith in North Sydney.

[10] A nine-member expert committee was appointed, including the prominent engineer and planner, Sir John Butters, as chairman.

[11][12][13] The committee's recommendations, including for a new law courts building on the site of the Parliament House, the Sydney Hospital, as well as the Sydney Mint, were accepted by the government in early 1937, and the Stevens Government requested that the committee then commence a design competition for this new structure.

[22][23] In June 1946, a new Macquarie Street plan was unveiled by McKell's government, with new draft designs that included a public square at the top of Martin Place, a law courts building, and a theatre/opera house complex.

Architects Group GSA and Hassell and engineers Taylor Thomson Whitting undertook the redesign with minimal changes to the external form of the building.