Check out Town of Vic Parks policy on garages carports located within the streetscape.
It will give you some idea of how restrictive and prescriptive councils can be on such matters.
KP is correct, though more than likely you will need to obtainable development application first before you then proceed to building licence submission with more detailed working drawings and engineers details.
Best thing to do is talk to your local planning department and seek their advise. More than likely they have their own policy that you can review and utilize as a starting point.
