Paraffin as a phase change material showed a great potential to promote energy efficiency in buildings due to its unique thermo-physical properties. However, its low thermal conductivity can negatively impact the charging discharging process and affect the heat transfer efficiency. Previously, many researchers have focused on using shape-stabilized materials and additives to form paraffinic phase change materials (PPCM) with a high thermal conductivity. However, these techniques resulted in the reduction of the total amount of paraffin incorporated into the PPCM and thus lowered the overall thermal efficiency. Based on the analyzed literature data, this paper suggests that the paraffin content in the PPCM should be equal or higher than 50.0% to achieve better performances. Therefore, exploring novel composites and additives to form thermally stable and efficient PPCM with enhanced heat transfer could be a topic of interest to encourage and implement more sustainable practices in the building industry.