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Hi thank you for your message, it is not impossible but homes of this nature tend to require compliance with very strict building codes. These tend to be expensive because of the requirements needed to be complied with in their construction. Therefore, you should speak to the planning team that covers the land you are thinking of buying and see what their approach is likely to be to an eco house, for example one that complies with the higher standards of compliance for sustainable housing such as a code 5 or code 6 home. You also need to think about cost, even if you can get permission it will cost a lot to construct so can you afford that investment.
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