At least in the U.S. when dealing with building inspectors you describe your house as a "prefab steel-frame building." I've seen container houses in the E.U. al

At least in the U.S. when dealing with building inspectors you describe your house as a "prefab steel-frame building." I've seen container houses in the E.U. also, so certaintly they have some kind of regulatory framework for dealing with these too. From what I can tell these things can pass building codes if constructed correctly, and also when communicating with the government clearly. The bigger problem is them passing zoning / architectural review that many local governments requires to keep a certain aesthetic in the neighborhood.