Five hundred tons of earth has been spread on the main part of the houses reducing the visual impact of a development and making the homes almost invisible from roads or points of public access. This ‘earth-sheltering’ allows the return of most of the ‘green footprint’ of the area taken up by the homes – much of the roof has been re-colonised by grass and local wild plants, as well as frogs, small mammals & their predator the kestrel! The stinging nettles are also an important plant for a number of British butterflies including tortoiseshell, that are particular abundant on site. The soil also provides a temperature buffer for the homes due to its insulation properties.