With all your other homes that you have asked about over the years, use the contacts you already have from those houses to give you a cost. Because with minimal information given in this post…..there really is no answer unless you give more details. Size of extension, spec required etc etc.
"what will be the layout"? whatever you want it to be depending on your living needs
Reno to existing building start flagfall $400K + Extension budget about $4K/m2 min @ ground level, upper level think min $5.5K/m2, - this is for standard/reasonable quality custom scenario. Higher end finishes & architectural complexity add another 25%-30% on top of this. Anything that involves reconfiguring a whole house + some form of extension whether up, down, out/sideways will be $1M- 1.2M min as a starting point by the time you factor in design & doc, builder's profit & GST
Umm -- knock down and start again may be viable , depending on the location ( i.e. a higher value suburb will likely gain the cost plus more ) . Or sell and buy something you like .
bigreader
Magdoline SOriginal Author
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