EFH flat pack container house is a modular structure that can be built quickly and easily. It is lightweight, airtight, and shock-resistant. The structure allows for unlimited compounding in both the longitudinal and transverse directions. It is a cost-effective and flexible way to build a home. It is also highly insulated and water-proof, which means it will not let in any moisture. Expandable container house can also be combined together to form a larger structure if needed.