Facade according to DIN18202 flawless

Don't make this mistake... you will be annoyed with this facade forever. Without an expert, even if it costs money, you will not get any further.

Our lawyer is now trying the route of approval from the building authority for the [Wärmeverbundsystems]. Since such a thing does not exist with us, our developer still has to arrange it, and someone has to inspect the facade who must come from the developer. This way, we could save having an expert from our side.

Question: What would it cost in the worst-case scenario to properly plaster the wall?

Scaffolding approximately 3000 euros

Replastering if the substrate can remain, I think between 12000-16000€

I have an estimate of just under 6500€.

Off-topic: My understanding was that legal expenses insurances generally exclude construction matters. Which insurance do you have, and to what extent has it guaranteed coverage of the costs? Are you with a specialist lawyer for construction law?