CalEarth’s Eco-Dome can be built out of nothing more than dirt, barbed wire, and the same kind of polyethylene bags used to make sandbags to contain floods. The house will probably last longer if you mix some cement with the dirt, but it’s not absolutely necessary.

The bags come in the form of a continuous tube, and the house is constructed of layers of dirt-filled “snakes,” with barbed wire laid between them to keep them from moving. This 400 sq. ft. home is one of CalEarth’s plans that can be built from the dirt on your land.

It’s 21st-century adobe: faster and easier than traditional adobe construction, because you don’t have to make and dry individual bricks. This construction technique can be learned quickly by anyone, and is about the cheapest possible way to build lasting shelter. But these are by no means temporary buildings; they are so robust that they meet California building codes.

Plans and a DVD and bags are available at the CalEarth’s Eco-Dome web site.

Eco-Dome video of the construction:

Eco-Dome pictures of the structure.