An Inexpensive, Earth-Sheltered, Passive Solar House

The Kalmers’ earth-sheltered, passive solar house is made out of many free and inexpensive materials, and cost less than $10 per square foot.

Outside of Kalmer Household
The author, Doug Kalmer, and his wife performed much of the labor on their house alone or with friends, hiring out only the excavators to help with the earth-sheltered part of their home.
Photo by Doug Kalmer