The proportion of women - which has historically been very low - is now up to an all-time high of 30 per cent.
Some 10 years ago the figure stood at around 10 per cent.
This result will please long-term campaigners such as Women in Architecture and Architects for Change.
They have long argued that the profession is 'institutionally sexist' and is in desperate need of reform.
These groups will also claim to be unsurprised by the fact that many women questioned in the survey were keen to see the ARB retention fee cut back for those who work part-time or intermittently.
However, critics will argue that this still compares very poorly with professions such as law, which now has an entry level of over 50 per cent women.