Abstract Wood plastic composite (WPC) is one example of a biocomposite that has been applied commercially as structural materials either in the building industry and in the automobile interior parts. In this work, WPC was developed based on polypropylene (PP) from used medical mask, polyethylene (PE) from plastic pocket reinforced with wood flour mixed with eggshell powder (ESP). The study aims to target similar properties as commercial WPC with its tensile strength of 14.27 MPa, flexural strength of 37.57 MPa, water absorption 2.61 %, and flammability (burning rate) < 100 mm/min. The composition of the composites investigated was PP (45 wt. %), PE (5 wt. %), wood flour (30 wt. %), ESP (20 wt. %). The effect of calcined and uncalcined ESP on the properties was first studied and the results show no significant differences in their properties. That finding leads to prepare biocomposite samples using hot press with various applied pressures, i.e. 0.55; 0.65; and 0.75 MPa. The tests show that the samples prepared with hot press pressure of 0.55 MPa can meet all the limit target of the above properties.