there are two good posts that talk about this.. there are some great tips here on planning.. but a lot depends on where you are..

https://steempeak.com/ecotrain/@eco-alex/earthship-biotecture-transcribed-pt4-heating-your-home-with-body-heat-in-norway-about-permits-in-usa-and-europe-how-to-get-them

https://steempeak.com/ecotrain/@eco-alex/earthship-biotecture-transcribed-pt-5-how-to-retrofit-getting-permits-tire-toxicity

feel free to ask questions!

being friendly and a good communicator goes a LONG way!