SAP ratings are essential for issuing Energy Performance Certificates (EPCs), which are required for property sales and rentals. The software ensures consistency and accuracy in energy assessments, promoting sustainable building practices and energy saving . Standard Assessment Procedure (SAP) software is a tool used in the United Kingdom to assess the energy performance of residential buildings. Developed to comply with building regulations, SAP calculates energy use for space heating, water heating, and lighting, thus determining a home's energy efficiency rating. This software helps design energy-efficient buildings by evaluating factors such as insulation, heating systems, and renewable technologies.