Planning approval: Is required, as it is listed as a discretionary land use in the majority of the zones in which it can be considered. Depending on the scale, noise, dust, fumes etc, work that could potentially disturb neighbouring properties may not be permitted, as such uses would be considered more appropriate in an industrial area.
Building permit: May be required if you are making structural changes to a property.
Health approval: May be required, depending on the type of business proposed. For example, a business that produces a lot of dust, noise or fumes.