L1A – SAP calculations for new dwellings
In order to demonstrate compliance with Approved Document L1A you must provide your Building Control Officer with a SAP calculation for each new-dwelling.
A SAP calculation is the Government’s approved methodology for calculating the energy performance of dwellings. All new dwellings must achieve a dwelling CO2 emission rate (DER) no greater than a target CO2 emission rate (TER). The SAP calculation process is in two stages: