SAP and SBEM calculations are integral to evaluating the energy performance of buildings across the UK, each catering to distinct types of structures. SAP is dedicated to domestic dwellings, offering a detailed assessment that encompasses factors like insulation, heating, and construction materials, thereby ensuring accurate reflection of energy efficiency and carbon emissions. Conversely, SBEM is tailored for non-domestic buildings, employing a streamlined approach to determine energy consumption and carbon emissions, essential for compliance with Part L of the Building Regulations and generating Energy Performance Certificates (EPCs). By distinguishing between these calculation methods, building professionals can make informed decisions to enhance energy efficiency and adhere to regulatory standards.