Good morning,
The total amount of the BV is TEUR 360. The first two installments are TEUR 30 for the planning and TEUR 30 for the building permit.
I am confused that you are supposed to pay TEUR 30 for the planning already; I could understand that with some prefabricated house providers. However, with a "one-stop" service in solid construction, not at all. And honestly? Aside from the fact that I would be interested in the payment plan (how much did you pay with the shell closed?), I would not accept this payment plan as it stands.
It is quite common that payment is made according to construction progress; planning services are also included. The first installment "should" only be invoiced "can" when the building application is submitted to the responsible building authority. The guarantee (bank or insurance) must be submitted before the start of the civil engineering work.
No work done yet ....
That is not entirely correct, because part of the planning service has already been rendered. If the OP had gone to the architect—and later commissioned a BU with the actual construction, he would have had to pay a fee before even a little earth was moved ;)
Rhenish regards