This was a house, now it is 2 flats. Why does it need a SAP test? When a house is converted into 2 flats, the use was residential before, but now the building contains 2 residential dwellings. This is a
Conversions – do they need a SAP test?
Why Does My Extension Need a SAP Test?
An extension needs a SAP test if the glazing is more than a quarter of the floor area. This includes doors, windows and rooflights. If any glazing is removed from the house in order to create the extension this is