Nowadays the use of insulation wall in building construction faces some problems such as having high in dead weight, low resistant to humidity and limited mechanical strength. This green technology project proposes lightweight concrete as a replacement for insulation wall. This lightweight concrete will be developed using polymer waste, sand, water, and cement. This research was used thermoplastic polymer waste which is PP (Polypropylene) material as the reinforcement material to replace small gravel in conventional concrete. All its composition percentage of raw materials was divided into different samples composition. Its composition determines the performances of the samples in physical properties, density and water absorption percentage, mechanical properties, compressive strength as well as microstructure analysis.