From 1920 to 1957, three bodies, successively the Federal Capital Advisory Committee, the Federal Capital Commission, and the National Capital Planning and Development Committee continued to plan the further expansion of Canberra in the absence of Griffin; however, they were only advisory, and development decisions were made without consulting them, increasing inefficiency.
Sejak 1920 hingga 1957, tiga lembaga, yaitu Federal Capital Advisory Committee, Federal Capital Commission, dan National Capital Planning and Development Committee terus merencanakan perluasan Canberra tanpa Griffin bersaudara; namun demikian, Griffin bersaudara hanya berstatus penasihat dan keputusan pembangunan diambil tanpa berkonsultasi dengan mereka sehingga semakin tidak efisien.