Pumice is a volcanic aggregate that has been used to produce lightweight concrete for many years. In New Zealand there are large deposits of pumice in the central North Island. Self-consolidating concrete was introduced into Japan in the late 1980s due to a shortage of skilled workers. This paper reports the outcomes of a project to develop a lightweight self-consolidating concrete mix using two types of pumice densities. J-ring, L-box, V-funnel and slump flow tests have been utilised to evaluate the fresh properties of the mix, in addition to testing the strength and the length change.