Hello all I have a property in eastern suburb melbourne (knox council) , it has one older dwelling in the middle of the 700 sqm block of land. The front of the house is about 20m and was wondering the feasibility of building 2 single level dwellings side by side. The council planner was generous and looked at our concept sketch and said no issues. Now talking to some design shops suggested by the custom builder- huge difference in cost ! From $8000 to $25000 for desi and getting plans approved with Engl drawing! Why such a diff?