Information about the department's functions and government funding allocation could be found in the Administrative Arrangements Orders, the annual Portfolio Budget Statements and in the Department's annual reports.
The functions of the Department were listed at its creation as:[1]
Design, estimate of cost, supervision and execution of all architectural and engineering works (both capital and maintenance) for the Commonwealth Government and such other works as were requested by a state or an authority of the Commonwealth or of a state
Inspection of all works and advice to the Department concerned as to necessary maintenance and the estimated cost of such maintenance
Formulation of proposals for the co-ordination of works projects independently initiated by two or more departments
Formulation of town planning proposals in areas controlled by the Commonwealth in collaboration with other responsible departments
Technical advice in relation to Commonwealth works programs
Investigation, planning and development of such works of national importance as were referred to the Department by the Commonwealth government
Technical advice to the Commonwealth in relation to works of a state, or of an authority of a state, in which the Commonwealth had a direct financial interest, and, if so directed by the Commonwealth Government, the design or execution of those works
Collaboration with Commonwealth and state departments and authorities and local authorities on regional and town planning insofar as it affected Commonwealth works
Submissions to the Defence Services of works proposals or work plans (other than defence works) for which the Commonwealth was wholly or partially responsible, and which, in the consideration of the Department, had strategic importance
Collaboration in research carried out by Commonwealth and state departments or authorities in relation to works and the circulation of relevant data to interested departments or authorities; and also the planning and conduct of such further research as the Department considered necessary in relation to matters affecting the planning, design and execution of works