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bentleybonnie

Which is cheaper? Raise home and build under or separate granny flat?

Hi, My postwar property on concrete stumps is not legal living height underneath. The total house is only 94 sq metres. Underneath is 1.9 - 2 metres high and is only used for storage.


I am considering putting a ground level "granny flat" on my property which has space for 2 bedroom, 2 bathroom and a separate room (or nook) for study and lots of storage for study materials, linen etc. small kitchen, living, dining area and a small European laundry. Also to have an alfresco or pergola area. (Also room for a wheelchair just in case this was ever required).


My question : Is it cheaper to raise the current home and build the granny flat underneath OR to have a separate granny flat built at the back of the property?


If I raised the current house, I would probably have to do a small extension to it, because once the back to back car space (for 2 cars) is accounted for, there is only about 55 sqm living space left underneath.


The land space is 607 sqm. Our council allows granny flats to be up to 80sqm without council approval (but it has to be approved by a building certifier). Buildings can only be as high as 9.5 m.


My house is very basic. Two of my new neighbours have removed their postwar homes and have built large new houses, but I don't have the funds to do this.

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