The cost of building a shipping container house in Cary is primarily determined by the cost of the container, the materials needed, the design of the house, and the labor cost. A 20 feet long container can be bought at $1,400 up to $2,800 depending on the condition of the container and how used it is. A 40 feet long container can be purchased starting at $3,400 up to $4,500. The cost of converting it into a shipping container house in Cary will also depend if you will hire a builder to build it for you or you will buy a pre-fabricated Cary shipping container house from a manufacturer.