Housing & Environmental quality
Average energy efficiency (SAP) ratings, 1996-2006
This graph displays the average energy ratings (or Standard Assessment Procedure (SAP) ratings) for new homes in England and Northern Ireland between 1996 and 2006.
The SAP is based on the costs of heating, ventilation and lighting. It is used to generate an energy rating of homes on a scale of 1 to 100 – the higher the number, the greater the predicted energy efficiency.
Average SAP ratings in both England and Northern Ireland have steadily improved over a ten-year period, with improvements from just above 40 in 1996 to 48.7 in England and 52.5 in Northern Ireland in 2006.
Source: UK Housing Review, 2008: 111, 114