What is a portable building classified as?

A portable building is classified as a nonresidential structure without axles and lacking a permanent foundation. This classification is significant because it defines the building's mobility and construction characteristics. Unlike mobile homes, which are designed for long-term residential use and typically have permanent utilities, portable buildings are intended for temporary or flexible use scenarios. They are often used for storage, offices, or workspaces that can be moved as needed, distinguishing them from structures that are permanently affixed to a site.

While recreational vehicles are designed for travel and typically include living amenities, a portable building does not serve that same purpose of providing mobile living space. The option that identifies portable buildings as structures for temporary use, while somewhat accurate, does not capture the specific characteristics related to their lack of a foundation and axles. Therefore, the classification as a nonresidential structure without axles is most accurate in this context.