SAP Calculations

SAP Calculations | Fading Footprints 

SAP Calculations –  all you need to know… 


What are SAP Calculations? Do I need to have them? What is SAP 2012?


We love a good energy calculation and SAP calculations are definitely our thing, but we can’t all be experts so here are a few Q&A’s to get you up to speed….

What is SAP?

The Standard Assessment Procedure (SAP) is the methodology used by the Government to assess and compare the energy and environmental performance of dwellings. Its purpose is to provide accurate and reliable assessments of dwelling energy performances that are needed to underpin energy and environmental policy initiatives.

How does SAP work?

SAP works by assessing how much energy a dwelling will consume, when delivering a defined level of comfort and service provision. The assessment is based on standardised assumptions for occupancy and behaviour. This enables a like-for-like comparison of dwelling performance. Related factors, such as fuel costs and emissions of carbon dioxide (CO2), can be determined from the assessment.

SAP quantifies a dwelling’s performance in terms of: energy use per unit floor area, a fuel-cost-based energy efficiency rating (the SAP Rating) and emissions of CO2 (the Environmental Impact Rating). These indicators of performance are based on estimates of annual energy consumption for the provision of space heating, domestic hot water, lighting and ventilation. Other SAP outputs include estimate of appliance energy use, the potential for overheating in summer and the resultant cooling load.

What is SAP 2012?

SAP 2012 is the latest revision of the SAP document.

This 2012 version of SAP was published to underpin the 2013 Amendment to Part L of the Building Regulations for England and Wales, which is expected to deliver a 6% improvement in new dwelling performance. In due course it is also expected to underpin the Building Regulations in Scotland and Northern Ireland.

Changes to the 2012 version of SAP were subject of a public consultation in 2012.

What are the future developments for SAP?

Development of SAP and RdSAP will be timed to meet the demands of users. A formal review is currently underway, which is expected to be completed in 2016. In the longer term it is anticipated that further changes will be needed in line with the requirements of European legislation.

Who does the SAP calculations?

Meet our super team who can answer all your SAP questions and carryout your SAP calculations.

The Team

SAP Calculations – GOV.UK

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