Is the size of the house connection room sufficient?

I do not actually live in Germany but west of it. House utility rooms are somehow less problematic there. Here is an example of how it is standard in almost all houses: "large technology" and "small technology" are installed separately.

In my case, the small technology is behind the front door, behind the door frame. These are electricity meters, water connection, telecom. It has a maximum depth of 23 cm from the wall. That is really space-saving. I also have the converter and the home battery hanging there.

The technology room for the large technology is a bit over 3 sqm, an interior room without windows. The hot water tank, controlled residential ventilation, heat pump connection, and filter for the rainwater for the washing machine. The washing machine is also in the 3 sqm + Ivar storage shelf.

Overall, I find this quite space-saving considering what you have to build around the equipment in Germany. I am glad to have my maximally efficient solution. Furthermore, the utility room is at the ugliest spot of the house and does not take up any nice space. Also practical.

Oh yes, don’t mind the chaos, that was shortly after moving.

p.s. observant viewers will find my moving vehicle in the busy picture with which I managed my move.

I remember for example

and lost a few centimeters of storage space.

For us, it is one of two tall cabinets that was removed because of the incorrectly positioned HAK. In the meantime, the wall is dotted with more devices, most recently for fiber optics.

The cleaning wouldn't really bother me too much in the technical room.
However, if you plan it so tightly, you should ideally stand by at every house connection appointment. I vividly recall that fiasco in House #1, for example:

We joked about it back then and lost a few centimeters of storage space. In your case, it could possibly ruin the entire planning.

Now that I see that... definitely plan beforehand which connection goes through which hole of the multi-utility conduit. Otherwise, electricity and water will cross later on.

Does the room actually have windows? Under windows, sometimes no electrical connection boxes may be installed.

I think that's overall quite space-saving considering what you all in Germany have to build around the equipment.

That can also be space-saving in Germany. Water, electricity, heating, all on one wall.
Washing machine and dryer in front of the heating.

But that indeed requires talking to the craftsmen and being on site during installation.

This is now also very important for a technical room, that no spider lies dead around. I recommend vacuuming conventionally for 5 minutes once a year. :p

You’ll laugh, but even without a cleaning obsession, I want to be able to quickly and easily vacuum away cobwebs and dust every three months. And that’s not possible in, for example, a 1 sqm corner at our place because the water softener system was installed extremely tightly and stupidly. I also wouldn’t plan too tightly in case a device needs to be replaced or a part of the technology expanded. The devices are not constructed like kitchen cabinets with standard dimensions. For example, our new network cabinet could only be installed after we relocated the fuse box.