Building a structure against your neighbours boundary with no set back is infringing upon their respectable space. The structure proposed is much higher than a shed. This is creating undesirable shadow over the neighbour.
It is also a very intrusive building for those around this property that can see this building.
Along Northcote street no other neighbours are permitted to build in the flood zone. Please do not set a precedent where people are building against rules set out to protect against disastrous outcome. This is clearly breaking compliance in so many ways.