Hi - I agree with Johnzx - I am hoping to build a wooden house when I find the right plot, and spoke to my local planning office. They didn´t ask anything about whether the base would be concrete or temporary, or whether it would be connected to utilities, only saying that they treated wooden houses the same as any other style of construction. They also have different rules re size of plot depending on the exact location.
Other people have told me that if I put it onto blocks rather than concrete then it is temporary and different rules apply.
Others again have said that if you want to build on rustic land, as well as satisfying the minimum plot size (which varies widely) then you need to ask the regional government for permission to build, as well as the local council.
I think you would need to take your full proposal to the local council and the regional council before going any further.
Do let us know how you get on with it!