Given the challenge of providing resilient, low-emission social housing in southern regions, this study explores how innovative construction techniques can help reduce greenhouse gas emissions by analysing the carbon footprint of different materials used in various designs of a resilient social house in Nicaragua. The first reference house was built using prefabricated reinforced concrete panels, a roof steel structure and concrete roof tiles, with all concrete elements made from Portland cement. A second version of the same house was then studied, incorporating textile-reinforced concrete (TRC) and a mix of low-carbon limestone calcined clay cement (LC3) for concrete elements. This design also introduced a new roof system using prefabricated corrugated concrete panels and modified wall panels with increased width and reduced thickness. An optimised version of the second house was also analysed, refining the layout of prefabricated wall panels for construction ease. The carbon impact assessment of the construction materials highlighted the benefits of TRC combined with LC3 , achieving a 45% reduction in emissions. A detailed investigation showed that two-thirds of the reduction resulted from LC3 , while TRC accounted for the remaining third. Additional reductions were explored through concrete mix optimisation, suggesting that emission reductions beyond 50% could be realistically achieved.