This low impact woodland home in Wales is the cream of the crop. The woodland home was built entirely of natural materials, and best of all - only took 4 months and $5000 to complete.
The design is ingenious, dug into a hillside for low visual impact and strong shelter. Straw bales provide super-insulation to keep the heat in. The lime plaster is breathable and low energy to manufacture. Wood-burning heater. Underground-cooled fridge. Skylight. Solar panels for electricity. Compost toilet. Spring water.