Unfortunately yes. I wish it was that easy. That's why I said "jurisdiction with building code". Florida is free AF. They have pretty serious building code for anything people are expected to occupy because hurricanes. The mountain west is free, on paper, at a state level. But at a local level there's fucktons of jurisdictions that are basically run by carpetbaggers from California (if not in literal state of origin then spiritually) who make everything hard. The various offgrid cabin forums are absolutely chock full of horror stories about how those people run the place.