We enjoy watching Teletubbies before, especially when high, Groovy crazy and are passionate about their underground home cool. But did you know these underground homes already exist?
Earth House Estate Lättenstrasse is a residential area built in Dietikon Switzerland. It was designed by Peter Vetsch as an alternative to the existing house. Teletubbies-style home is more economical electric energy especially during the winter. Its main problem is it is more expensive to build because the use of sprayed concrete and requires a good insulation during construction. Frame house first "woven" using steel and concrete is sprayed on steel frame. Then I put polyurathane coating as thermal insulation and moisture. Because of the high cost of this is not such a popular home construction.
Source BestHouseDesign