This research examines the impact of carbon nanotubes (CNTs) on the properties of geopolymer mortar. Geopolymer mortar, recognized for its sustainability and durability, is emerging as a viable alternative to traditional Portland cement-based concrete. The study focuses on the synthesis and characterization of geopolymer mortar incorporating varying proportions of CNTs in Ground Granulated Blast Furnace Slag (GGBS). A series of tests, including compressive strength, flexural strength, and water absorption, were conducted to assess the effect of CNTs on the geopolymer matrix. The results indicated that an optimum CNT content of 0.2 wt% yielded the highest compressive and flexural strengths while minimizing water absorption. The findings provide valuable insights into determining the appropriate CNT dosage to maximize both strength and durability in geopolymer mortar. This study contributes to the advancing field of nanotechnology in construction materials, offering guidance on optimizing geopolymer formulations for improved performance in prefabricated elements and sustainable construction.