URGENT: Plausibility Check of Additional Construction Costs - 2 Days Before Deadline

So, I have now read through the contract with all stipulations twice. There is nothing about a building permit. By the way, nothing about a construction status report either. I only have to have the expert inspect it after completion. Maybe then he will take a closer look with my bank, not just 5 minutes? But alright, then everything is fine, they have already had an appraisal value well over 500,000 EUR based on the old plan. If it is bigger and better, it will work out.

Our controller from the bank was only there for 10 minutes and checked whether a house as planned or a Maserati is there