This paper reports the development of 3D printable composites and laboratory-scale 3D printing technology, which are capable of producing building and construction components of properties and performance comparable to conventional casting methods. The slump test was carried out to examine the consistency and workability of fresh 3D printable eementitious mixtures; whereas the hardened density and compressive strength measurements were conducted to assess the performance of hardened 3D printable cementitious composites.