The local authority reduced the amount of money allocated to the Colston Hall scheme after a funding review - associated with a change of leadership at the local authority - earlier this year.
However, according to the architect, this pre-planning consultation and the visualisation of the new foyer building for the concert venue demonstrate its future 'look and feel'.
Levitt Bernstein claimed the new foyer will give the hall a greater and more memorable presence in the city. It will include an open foyer performance space, cafes, bars and lifts to all levels of the existing auditorium.
The building's cladding will still be curved copper alloy and the facade design is inspired by a study of 'proportional relationships' in music.
Since 1890, the Colston Hall has been burnt down twice, re-modelled and partially re-built.
It is hoped that the foyer will be submitted for planning early next year.