“Underground living refers simply to living below the ground’s surface, whether in naturally occurring caves or in built structures.
Underground homes are an attractive alternative to traditionally built homes for some house seekers, especially those who are looking to minimize their home’s negative impact on the environment. Besides the novelty of living underground, some of the advantages of underground houses include resistance to severe weather, an exceptionally quiet living space, an unobtrusive presence in the surrounding landscape, and a nearly constant interior temperature due to the natural insulating properties of the surrounding earth. The greatest draw for most, however, is the energy efficiency and environmental friendliness of such houses. Because of the stable subsurface temperature of the Earth, heating and cooling costs are often much lower in an underground house than in a comparable above-ground house. When combined with solar design, it is possible to eliminate energy bills entirely. Initial building costs are also often exceptionally low, as underground building is largely subtractive rather than additive, and because the natural materials displaced by the construction can be recycled as building materials. However, underground living does have certain disadvantages, such as the potential for flooding, which in some cases may require special pumping systems to be installed.”