It all depends on the area you live in. I had always heard the stories like the ones in this post and tried to call around to the county office. They told me i only need a permit if I build a temp or permanent structure that was not already there. She gave a band stage as an example. Because I am in a barn I don’t have any permits to buy. When I tried to get a fire marshal out here no one would return my calls for months and I kept getting the run around as to who actually is over my area. So basically other than standard state business stuff, I haven’t had to do anything. I am sticking to all the life safety rules anyway, for an overall safe visit and just in case they change their minds and want to come out to inspect.