An illustration of green building features of the 700 square foot starter home by the creators of the Eco-Building Toolkit. It will be crowd-sourced and built in November 2016. (Image courtesy Open Building Institute)

An illustration of green building features of the 700 square foot starter home by the creators of the Eco-Building Toolkit. It will be crowd-sourced and built in November 2016. (Image courtesy Open Building Institute)

An illustration of green building features of the 700 square foot starter home by the creators of the Eco-Building Toolkit. It will be crowd-sourced and built in November 2016. (Image courtesy Open Building Institute)