House connection planning and technical room in the basement

Ok, yes, swapping would basically not be a problem, I think. The laundry chute comes down there, and upstairs I actually don't want to change the plan. But then you would have to carry the laundry downstairs into the other room.

also plan the technical room, if the heating engineer hears the right wall is his, he will fill it up. We had marked with chalk on the wall, 1.2m heating engineer, therefore the control cabinet (1m), washing machine (0.7m) and freezer (0.8m) now also fit next to it. Everyone had their area

They haven't said anything about it yet, we're not that far along;-)

Ok, then I already know. But is it basically possible to enter the house connections elsewhere and from there into the technical room? It should actually fit. Then the fuse box is just somewhere else, but that doesn't matter, right?

I don't know how anyone can completely misinterpret my post like that? Nothing is fine as long as you haven't discussed the options possible under your framework conditions with the relevant trades and suppliers. Not everything is always possible! You are fully in the planning phase. In exactly this phase, you MUST involve them. Later is too late.

For us, the connection was only included in the flat rate. Every meter in unpaved ground around 80, in paved ground 100 EUR net. With you, it could easily be 25m, so for electricity and drinking water about 5,000 EUR gross, possibly more if the line is on the other side of the street. You pay up to the main cable, not up to the property boundary ;)

Definitely plan, mark, and be present during installation for the technology in the HAR. We also painted everything nicely on the rough wall with installers and site managers, in 3 different colors. Then came the plaster, I was under the illusion that the craftsmen had the plan from the inspection with them and suddenly...

The heating circuit distributor is where the washing machine was supposed to go, the pipes to the bathroom run right in the middle of the wall where a shelf was supposed to be, the house connection box is not where it should be. Only Telekom screwed themselves in where it was planned. I was there for that, I had to let them in...

Sorry if I misunderstood something. I actually find it quite difficult to figure out the best way to approach the entire planning. I have spoken with the suppliers. According to them, the current plan is okay.

The idea was actually to plan and get approval first. At the same time, I would now issue tenders for the major trades and simultaneously obtain offers from two prefabricated house providers. So if I don't know exactly who I am building with yet, I can't already talk to the trades in advance, can I?

Suppliers are important (some are quite "special"), everything else of course can only be clarified in detail upon commissioning. The basic problems (rough cable routes, estimating space requirements for devices + connection rooms, etc.) can/will surely be taken into account by your architect.

However, it is also possible (now or soon) to bring in a MEP planner, then depending on ambition and budget, you can even get a 3D/BIM planning where virtually every cable route is specified - then the executing trades only have to "paint by numbers." Of course, as always, theory and practice then need to be harmonized on site...

This is not necessarily wrong, because there are numerous points where coordination is needed and ideally a compromise solution is already found during the planning phase (design of underfloor heating, controlled residential ventilation planning, cable routes with intersections, consideration of floor structures, etc.).