Soil is a type of traditional material in the building industry. Middle Eastern countries started using it as a basic building material many thousands of years ago. Traditional earth building or earthen building used soil and clay as basic materials in bricks, adobe, and rammed earth walls. The role of technology in the building industry is clear because robotic and automation technologies are developing new building industries and projects. 3D printing is a kind of modern technology in construction. Existing achievements of 3D printed concrete houses show a good performance of 3D printing technology for the development of modern buildings in the future. The role of earth materials in modern buildings with 3D printing technology is very important and clear. In this paper, various research activities of earth materials and 3D printing technology are evaluated. 3D printed earth houses can be defined as “3D Printed Green Houses” in the building industry.