The key difference between a mobile home and a manufactured home lies in the construction standards and regulations. Mobile homes were built before June 15, 1976, when the U.S. Department of Housing and Urban Development (HUD) established national building codes. Homes built after that date are considered manufactured homes, as they must meet stricter HUD standards for construction, safety, and energy efficiency. Essentially, all mobile homes are manufactured homes, but not all manufactured homes are mobile homes. Manufactured homes are built to be more durable, safer, and energy-efficient.