An architect is not allowed to do that in this form at all, either he is a GU or an architect, how exactly that depends on I don’t remember anymore but it was the topic in the [blauen Nachbarform] a few months ago.
The same arrangement was offered to us back then by a civil engineer.
House at a fixed price, but billing directly with the individual trades.
However, it failed due to other reasons, so we did not pursue it further.
An architect is not allowed to do that in this form, either he is an architect or he is something else,
An architect as an architect is not allowed to be a general contractor, that does not belong to his liberal profession. Conversely, I can see no reason why a general contractor should have himself removed from the role of architect if he himself is an architect. Where should it say that the architect of a general contractor may not also be himself?
It's not stated anywhere yet. I asked, no answer from the OP so far.
At least that's how I read it:
Now I got recommended a regional architect through acquaintances, who also offers a fixed price like a general contractor (for the complete turnkey house). The only difference would be, as is usual with architects, that it is not "all from one source," but individual contracts are concluded with the trades, which the architect still puts out to tender and later coordinates. His profit would then practically be his fixed price minus the costs negotiated with the trades.
An architect is not allowed to do that in this form either, he is either a good or architect, I don’t remember exactly how that depends but it was the topic a few months ago in the blue neighbor forum.
I did architectural accounting many years ago.
Sole proprietorship = Architect
GmbH with architect as shareholder managing director = Property developer