Building law: Electrician refuses to continue

You see a pair of trousers in the department store. It costs 100 euros. You buy the trousers, want them shortened a bit and tailored a bit tighter. Possibly also a small patch. Then the trousers cost 100 euros plus alteration costs.

In the department store, however, I am informed beforehand that additional costs will be incurred and to what extent. There are also clothing stores where this is included in the service.

The costs for the functional equipment were available.

No, not at all!

So it means I have to ask about the cost for every detail/handshake,

Hello Pinkiponk

that's how you should do it.
Craftsmen work to earn money.

Steven

Addendum: It is not about being right or a know-it-all, I just want to be able to understand how the craft works, as I will soon be dealing a lot with craftsmen.

no, exactly not!

I understood your initial post to mean that a very simple electrical installation was included in the contract. That’s what I mean by price for a functional solution.

And the sentence "we thought" is simply deadly in construction. If you don't talk about expectations and price, then exactly that happens.

That is also a valuable hint. I still believe it would be easier, perhaps also for craftsmen, the other way around, namely that you are informed about additional costs beforehand instead of the layperson having to explicitly ask about every detail, but if that is the usual practice in construction, the client must take that into account.