Abstract: Sandcrete blocks are extensively used for cladding, load-bearing purposes and for demarcating properties in Nigeria and other nations around the world. The need to produce high quality sandcrete blocks of low cost in an impoverished economy like we have in Nigeria has necessitated research into the use of locally available raw materials in sandcrete block production. This study reports on the investigation carried out to determine the effect of admixtures (sawdust and sugar) on the compressive strength of sandcrete blocks. Results showed that sawdust did not significantly enhance the compressive strength of sandcrete blocks. The results on the use of sugar showed that that sugar had a significant effect on the compressive strength of the blocks increasing it by 17% at 28 days. Both admixtures slowed down the setting and early stiffening of the mortar mix.