Building Earthen Homes Using the Original DIY Material - Adobe, cob, compressed earth blocks and clay-straw building methods are labor-intensive but tremendously rewarding. Green Homes - MOTHER EARTH NEWS
How to Build an Adobe Wall. Adobe is an age-old building material that is easy to make and extremely durable. Adobe structures account for some of the oldest extant buildings on the planet. Adobe buildings also offer significant advantages.
Cob homes! And the website has more construction types for sustainable housing I'm loving these example of larger family sized cob homes that don't all look like hobbit holes.) I like that cob can be freeformed