The client, who is a layman and relies on the contracted professionals not violating the existing development plan, is responsible and the professional is not ?????????????
Of course, the authorized designer submitting the plans is responsible. And he is also liable for his mistakes.
How can the creator, who is a professional and gets paid for the task, be held accountable?
By commissioning. If an architect takes on an assignment, he must also ensure proper and regulation-compliant execution. He is liable for omissions and damages. However, as with any group, there are also bad apples among those authorized to submit plans who disappear when complications arise. Only then do you, as the client, have a problem – as previous speakers have already explained.
I wonder who is liable in case of violations of requirements, that’s legitimate, right?
Yes. Get a confirmation of the professional liability insurance of the signatory. Then liability for clear planning errors is secured even in case of insolvency of the general contractor or lottery win of the responsible person.
I cannot assess whether this complies with the development plan or not
An independent construction supervisor can. If you care about safety, you cannot avoid this anyway.
I think the general contractor does that?
Do you think so? Ask around. Many don’t provide indemnities, precisely because they don’t want to take full responsibility. For reputable planners, disappearing is not an attractive option if disputes arise. Which brings us to another safety aspect: be careful when choosing the general contractor. Careful research saves sleepless nights – but without a certain basic trust, you should not become a client.