This sustainable eco house at the Hobbitstee uses mostly locally sourced materials. This is great because it cuts down on transport emissions. We help out for a weekend and learn about cob-plastering.

Hobbitstee:
https://www.facebook.com/Hobbitstee/
http://www.dehobbitstee.org/

Daan Ooms Ecobouw:
https://daanooms.nl/