Every US county handles this differently. There is no federal rule on container homes. It is all local zoning and building codes. The short answer: if you put it on a permanent foundation you need a building permit almost everywhere. If you keep it on pier blocks or wheels you might not. Most rural counties call a container on a permanent foundation a dwelling. They require the same permits as any house. Foundation inspection, framing inspection, electrical, plumbing, final. The permit process takes 2 to 8 weeks depending on the county. Metropolitan counties are slower and stricter. Some counties have never seen a container home permit application. You might need to educate the building department. That is more common than you would think. Our engineering reports and certification documents help with that. A few counties like Maricopa AZ, Polk FL, and Elbert CO have standardized processes specifically for container homes. If your county is not on that list email info@atvworldwide.com and I will tell you what other buyers in your area have done.