20ft flat pack container house is constructed by the light weight painted cold rolled galvanized steel frames and insulated sandwich panel（EPS or glass fiber）, these cabins are strong as well as aesthetically pleasing. The ability of flat pack the units allows for significant transport saving as they can be transported to site in kit form and four units are loaded in the same space as one standard 20ft shipping container. The units are erected on site when assembling,which are very easily joined and stackable up to 3 story or larger units as well as space saving,which still being easily dismantled for redeployment elsewhere as either the original unit or smaller individual units.