We have almost finished completing our house build. We employed an architect to draw plans and oversee the house build and each stage payment. A BER assessor came out and has told us we need solar panels. This will cost almost 3,000 and we hadn't budgeted for this. Also the first time we heard of it! My question is surely the architect should have known this wasn't done before now and should have noticed on his visits? He was probably out out about 3 times when he was supposed to be out 20. We have paid him upfront. Almost 10,000 he was given before the house build started. He has told us this will cover everything. In essense I've two questions: Do most architects require payments upfront and who is at fault that the solar builders wetent put on before now? Contractor, architect or both? Thanks for any insights.