Affiliation with R.I.B.A. in 1925 led to consideration of further changes in the existing Constitution and Bye-Laws. One of the first was that members of the R.I.B.A. in the Bombay Presidency and throughout India were now coming into the fold of the Association. It was on 2nd September 1929 that the new body was re-organised in Bombay and officially registered as "THE INDIAN INSTITUTE OF ARCHITECTS". Its chief objects, among others, as stated in the Memorandum of Association were;
"To continue the work of the Bombay Architectural Association founded as the Architectural Student's Association in 1917" and
"To encourage the study of Architecture, to elevate the standard of Architectural Practice and by mutual support, to promote the interests of Architects throughout India".
The Institute began its activities in the room of the Sohrab F. Bharoocha Architectural Library, 7-10, Elphinston Circle, Bombay and this therefore was the first permanent headquarters for the various activities of the Institute. Later, as things improved, the Institute and Library moved into the new and more convenient quarters which it at present occupies at Prospect Chambers Annexe, Hornby Road, now Dr. Dadabhai Naoroji Road, Mumbai - 400 001.
In 1929, the membership was 158. Today it has crossed the 12000 mark.