From 6th April 2009 any dwelling offered for sale prior to its completion will require a Predicted Energy Assessment. This measures the predicted overall energy efficiency and Environmental impact of the home based on the initial build (walls, roof, windows, floor etc) and engineering specification (heating, hot water etc) - view »
SAP stands for Standard Assessment Procedure, also known as Energy Ratings. Houses are rated from 0 - 100, 0 being very inefficient and 100 being highly efficient.
SAP ratings are the Government's standard methodology for home energy rating. SAP uses SEDBUK (Seasonal Efficiency of Domestic Boilers in the UK) figures to calculate the energy needed for heating and hot water systems. SAP ratings are used by local authorities and housing improvement programmes to assess the energy efficiency of both new and old housing.