According to the International Association of Certified Home Inspectors (InterNACHI), manufactured homes usually cost less than on-site homes, making it their biggest advantage.
Because manufactured homes are built in a factory and not at a site, they can be built in optimal conditions and do not suffer from weather delays.
According to InterNACHI, manufactured homes can only be one story and tend to be smaller than an on-site home, although they come in single-wide, double-wide and triple-wide.
Manufactured homes are not required to follow local building codes but do follow the Federal mandaged HUD Codes and zoning regulations. HUD Code requires manufactured homes to be made part of a non-removable steel chassis. On-site homes adhere to local building codes and zoning regulations.
Because manufactured homes are harder to expand or change, they tend to lose property value over time. On-site homes increase in value over time and can be modified more easily.