Who needs SAP Calculations?
SAP calculations are vital for property developers, architects, self-builders and homeowners to ensure compliance with building regulations Part L. Conversion projects also require a full SAP assessment & EPC to be produced, though these operate under different regulations to new builds.
During the construction process, you will need two sets of SAP calculations. The first, called a ‘Design SAP’, is required when submitting building regulations approval just before work begins on-site. The second, known as an ‘As-Built SAP’, is needed for final building regulation sign-off at the end of the project. This assessment verifies that the dwelling was built according to the original specifications. If any changes were made, they must be reported so the final SAP can be updated accordingly.
Why are SAPs and EPCs required?
SAP calculations and EPCs are required to ensure buildings meet energy efficiency standards and comply with building regulations. SAP assessments calculate a dwelling’s energy performance, helping to reduce carbon emissions and improve sustainability. An EPC provides a rating of the building’s energy efficiency which legally must be issued when a property is built, sold, or rented. These assessments help homeowners, buyers, and tenants understand energy costs and environmental impact while ensuring compliance with government regulations.
Both an ‘As-Built SAP’ and an EPC are required by building control, along with various other certificates, before final approval and completion can be granted. The Building control officer will review these documents to confirm compliance with current building regulations.
What information do we need from you?
We will need as much information as possible from you to complete your SAP assessment. Such as architects’ drawings which provide detailed information about the building’s layout and structure including, floor plans, sections and elevations. A full construction specification including insulation levels, heating systems and ventilation. We also need information on the window and door specifications, including their U-values.
For the final ‘As-Built SAP’ assessment, any changes from the original design must be documented, along with air pressure test results and any other relevant compliance reports. Having accurate and comprehensive documentation ensures a smooth and precise SAP calculation process.
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