A NORWEGIAN family have built a seven metre glass dome around their off-grid house in the Arctic Circle. Benjamin and Ingrid Hjertefolger have spent £340,000 constructing their dream home, which is made entirely from all-natural materials such as sand and straw - in order to live sustainably. Located on Sandhorney Island, north Norway, the 7.5 metre high dome is made up of 360 glass panels and shields the entire house with a diameter of 15 metres allowing the family to grow their own fruit and vegetables inside. The project started back in 2012 and one and a half years later, Benjamin, Ingrid and their four children, Julia, 11, Gabriel, nine, Aron, six and Alvin 10 months, moved into their unique abode.