Organize construction electricity/construction water yourself?

Provided he has a heat pump, with gas that doesn't help either

If the consumption alone is already included, then that's okay. Just the screed drying can quickly account for a year's worth of electricity consumption.

Is the screed dried using the electricity from the construction site power box? We will have underfloor heating with a heat pump! Doesn't that then already run through the proper household power connection?

The consumption is only included up to the connection of the household connection! So the electricity that runs through the construction site power box.

Depends on whether the [Hausanschluss] is already installed. For some, it is so early that the [Hausanschluss] has not been done yet. And the screed drying with heat pumps usually only works via the heating element.

We even had to provide construction electricity and construction water ourselves; this was not part of the house construction contract, and I believe it is a way to save a few euros. Every major electrical company offers the electrical boxes including connection and pickup at the end for rent, and the standpipe is available from the [Stadtwerken].

So you think it's more convenient to have the construction company handle everything? What did you pay for everything in total?

We even had to provide construction power and construction water ourselves; this was not part of the house construction contract, and I believe this is a nice way to save a few euros. Every larger electrician company offers the power boxes including connection and pickup for rent at the end, and the standpipe is available from the municipal utilities.

We did it the same way, or rather had to.

My electrician took care of the power box - no problem.

Standpipe from the municipal utilities: Well, the price was okay for one or two days, but it then increased so much with longer rental duration that it made me dizzy.

For the foundation slab and house setup, I rented the pipe – no one needed a drop of water from it. But everyone (the foundation slab company and the house company) wanted to see that a standpipe was available; I was thoroughly "enthusiastic."

When plastering, the neighbor helped out: I was allowed to draw water there. Otherwise, I bought 5 pieces of 20-liter canisters and carried the water into the house in canisters. It was always enough.

Another neighbor across the street then got water from me during his construction phase, well done with coffee and cake. The house behind him then got water from that neighbor, so we played a chain, which was really easy if you talk to each other and coordinate.

That aforementioned neighbor did his screed drying, by the way, when his air-to-water heat pump was not yet connected to the outdoor unit. Although this could have been done temporarily, it was spring; I said several times: folks, nonsense, this costs you about 3 times more money.
Result: 5 weeks pure heating rod, 45 degrees in the place, electricity bill 1,400 euros, sadness and whining.

Best regards
Thorsten