All construction details would be required. An air tightness test would give a better result and is actually required now under building regulations. The engineer that signed off on the build would need to provide all the details required, and data will be needed for the heat pump if one is installed. You won't get a grant for solar as your house is too new, unless your ESB Meter was installed before 2021
@westclareber. ( Replies: 5 . Qualifications:
SEAI BER Assessor)