When did solar panels become mandatory?!
GG
all PP beyond a certain date need a renewable element as per Part L
http://www.environ.ie/sites/default/files/migrated-files/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad%2C27316%2Cen.pdf (http://www.environ.ie/sites/default/files/migrated-files/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,27316,en.pdf)
The Part L TGD above is dated 2011 where it says from 1/12/2011 with some transitional exemptions.
OP
No comment on payment terms as its history.
Nothing to do with Contractor.
What is the date of the original PP or did you bother with planning?
When did building work start?
Why did the BER assessor only emerge now?
perhaps there is some other way the RE portion has already been met?
What is the A saying about it?
What did the Air tightness test number come out as
The more detail you provide on the actual build the more help we can try give.
IMO, perhaps the Solar PV option might be easier to do