expanses of glass and vast amounts of exposed concrete. Sadly, Hope passed away in 2003, but it wasn't until 2013 that the home was listed for sale, with a £39.9 million ($50m) price tag.

While looking for an advanced technology for the future, some home builders are looking to improve upon a design that has been used in other parts of the world throughout history; namely concrete.

The contractor's 3D printed concrete homes utilize concrete and, reportedly, "estimates suggest provide initial savings of up to 15% per square foot in building costs" as well as saving a ...