The term "factory-built" in manufactured structures refers to:

The term "factory-built" in the context of manufactured structures is specifically indicative of buildings that are constructed in a controlled manufacturing environment. This means that components of the structure are prefabricated under conditions that allow for consistent quality control, protection from weather-related delays, and quicker assembly compared to traditional on-site construction methods.

This approach facilitates the standardization of building practices, ensuring that structures meet specific safety and building codes during the manufacturing process. In contrast, on-site assembly by contractors, which would entail constructing buildings from the ground up at the intended location, does not fall within the definition of "factory-built." Similarly, buildings designed without pre-manufactured components do not qualify as factory-built since they rely entirely on local materials and methods. Lastly, the term "factory-built" encompasses a broader category of structures beyond just mobile homes, including modular homes and panelized buildings, making the specification of "only mobile homes" too narrow. Hence, the reference to construction in a controlled manufacturing environment directly aligns with the definition of "factory-built."