zlacker

This isn't always a state level issue. It's often established county by county. There are lots of counties in the US where there is no zoning law. The only state business you need to do there is report any improvements to the appraiser for tax purposes.

Some of these districts _do_ have inspectors anyways, and they will issue permits, but the county itself does not require you to do this. As I said though, you will certainly be unable to insure anything you've built without a permit in these places. Aside from that, you can build what you want however you want.