When do i need a sap rating

1. When do I need a SAP rating?
Since 1995, all new buildings in the UK have been required
to have a standard assessment procedure (SAP) rating,
which quantifies energy performance in terms of space
and water heating, lighting and ventilation. This applies to
any new structure, including a home conversion or
extension. Sometimes also referred to as an on
construction EPC or SAP EPC, the rating is calculated by
also considering the fabric and shape of the building, the
type and efficiency of thermal insulation in place, and any
renewable technology installed.
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