Building law: Electrician refuses to continue

no, exactly not!

Hello Alessandro

yes! you had a cost estimate with a scope of services. Now, in addition to this scope of services, you have ordered extras (your electrical plan, which you emailed to the electrician). Bing.
The electrician could have decently sent you a cost estimate for the extras. he did not. But you will be obliged to pay. A lawsuit would be too risky for me in this case. Besides, you want to move in in April. Therefore, an amicable agreement with the electrician is preferable.

Steven

Is it really a developer?

The problem is that you didn’t get a cost estimate for the additional work beforehand. A lot can add up with: Do this here and do that there...

That means I have to "demand" a cost estimate each time? That contradicts, for me, another note that there is no "obligation to offer."

: "Craftsmanship" works very simply and directly. The craftsmen provide the agreed services. Additionally, they perform services that you commission on request. These are then also charged and do not require a separate price agreement. "Can you put up a partition wall here?", "I would like more sockets here...", "Let's choose this color...", "Install a water softener...", "Fit this faucet for us...", "Better use copper for the gutter..." All of this is quick, uncomplicated, and of course for money. I always asked for an approximate figure and did not have a formal offer made – this gave us a high level of responsiveness on the construction site. If you are working with a strict budget, I would recommend noting everything briefly in writing – even if it’s on a plain sheet of paper to keep an overview. Responsibility and discipline are important to stay within the budget framework.

I still hold the opinion,

Hello Pinkiponk

this can get expensive when building.
For example, you believe that the window installers must leave the frames and panes spotless after installation. You say: Make the windows spotless. They do that and then send you an additional invoice. You placed the order and pay. Even if you were of the opinion....

Steven

yes! you had a cost estimate with a description of services. Now you have ordered extras in addition to this description of services (your electrical plan that you emailed to the electrician). Bing.

The correct procedure would therefore be not to award a contract immediately, as Alessandro basically did, but first to request a written (?) cost estimate and then, depending on that, to award a (partial) contract or not? Since you seem to be knowledgeable: Can a client nowadays still rely on a craftsman on the construction site saying it costs xxx extra, that it is true, or does a significantly higher bill come later anyway? (Apart from VAT additionally.)