SAP (Standard Assessment Procedure) is the Government-approved process for determining the energy rating of any new-build. A SAP Calculation is typically required for new homes, but you might need one for a conversion or extension. Please note that a SAP Calculation must be obtained before construction begins.
The calculation itself produces a rating which indicates a score from 1 to 100+, with higher scores denoting reduced energy costs and corresponding CO2 emissions. This score is based on a variety of elements, including the thermal components, water and space heating systems, and lighting of the build. It also considers the benefits that renewable technologies can provide.
Our quotation includes:
- Design Stage SAP Calculations
- U-Value Calculations
- Predicted Energy Certificate
- As-Built SAP Calculations
- Energy Performance Certificate (EPC)
- Lodgement Fee(s)
Information we require to complete the calculations:
- Full set of plans - hard paper copy or DWG format (preferred)
- Construction details
- Preferred method of heating and ventilation system
- Planning requirements (reduction in CO2 over Building Regulations)
Why is a SAP Calculation required?
Home builders and developers must achieve a "PASS" on their calculation in order to comply with current regulations in the UK. Building Control will not approve the development if it does not have a SAP Calculation or if the calculation shows a "FAIL", in which case the property cannot be rented or listed for sale.
Additionally, SAP Calculations can assist with the design of new dwellings in creating a better energy profile, lowering energy use and carbon emissions.
When is a SAP Calculation required?
A SAP Calculation is required at the start of the project and after the development has been completed. These are referred to as “Design Stage” and “As-Built” SAP Calculations.
Design Stage” SAP Calculations are carried out to demonstrate the proposed building's compliance with Part L Building Regulations. During this stage the TER (Target Emissions Rate) and the DER (Dwelling Emissions Rate) are calculated. The DER must be equal or better than the TER to achieve compliance. The dwelling also has to comply with TFEE (Target Fabric Energy Efficiency) and the TPER (Target Primary Energy Rate). The TFEE calculates the overall fabric efficiency of the building, and it must beat the target set out in Part L Building Regulations. The TPER will consider how much energy (kWh) is required to provide heating and hot water to a newly built dwelling. It will also include energy used by lighting, ventilation, cooling systems and showers.
Building Control demands an “As-built” SAP Calculation and EPC (Energy Performance Calculation) when the building is completed. Without it, it is unlikely that the building will receive final approval and cannot be advertised for sale or rental. If the building has been altered since the “Design Stage” SAP then the building's compliance may be impacted.
Please do not hesitate to contact us should you require advice or assistance.