Architect commissions surveyor without the homeowner's consent.

YES !!!

You have fighting spirit and won’t let yourself be fooled. Attack – but just be aware that it can also go wrong... in the end it only hurts financially if it fails, you have to know what you can afford.

You have written a lot lately, and I had a similar feeling as you about one thing: if the surveyor "fails" – the architect will probably be "easier" to handle... however: if not, then not.

I’m keeping my fingers crossed!
GD

3 hours on site for the survey or a total of 3 hours of work? Are there survey points or did they have to be searched for or determined first? It went so quickly for us because two of the four points were to be found on site and the other two points could be determined from these. The creation of the mapping and the entry in the cadastral maps then cost extra.

The architect commissioned the surveyor on 9.02.2022 for the survey, received the offer for it on 10.02.2022, and the survey took place immediately on 11.02.2022. Now honestly: I have a well-known craftsman for whom I am the VIP, and I have to wait at least 3-4 months before the worker arrives, and the surveyor was able to get it done right away?

If the two work well together, it works exactly like that.

What surprises me more is that the surveyor is already commissioned before you received the contract draft.

I also wonder why a surveyor is needed at all.

Plans are sufficient to check the legal situation.

You should follow my tip from #8 with the protocols.

Also the advice from from #36

The answer from #24 is still pending.

I wish you much success. Please keep us updated.

I also wonder why a surveyor is needed at all.

Plans should be sufficient to check the legal situation.

We don't know anything about the planned extension. Or the main house. But 750,000 euros is already a figure that does not suggest a 20 sqm conservatory on a new building.

We had to have our house surveyed so that the extension could be planned exactly. Especially if the architect is only supposed to "approve" the cousin's plan, then it is advisable for him to check the measurements and planning basics for the construction project. In our case – since it is an old village center without a development plan – there were no precise cadastral maps, no floor plans, nothing. If necessary, the boundaries have to be re-surveyed. When it comes to boundary distances, every centimeter counts. And old parcels are often not right-angled. Ours is, due to inheritances, easements, and land swaps, a drunken polygon.

And the statement of the OP, "The problem with the matter, however, is that the local development law would not have allowed the planned extension. A special application would have to be submitted and there was no guarantee that it would be approved. Unfortunately, I only found this out later."
Can mean anything. For example, the question of the floor area ratio. To be able to assess this, a survey is also necessary. We also do not know whether the OP conveyed to the architect that everything was very urgent – the issue with the bank suggests this – maybe one is kind enough to deal with things like surveying quickly. We only know one side.

I don't even know what exactly is being argued about. More than the basic survey hasn't actually been done (+ surveyor).

if the architect says he has the plans of the house, then I even assume that he had it measured back then.

I am still unclear why one would meet with the architect 4 times if they did not want to commission him.

whether a HOAI contract was concluded here, I doubt until I have seen the invoice.