Semi-detached house - Which one is the best? Who has experience with that?

The idea of looking for a breakeven point, even though staying 5% behind the latest state of the art would already be the elixir of life, no longer requires the collective intelligence of a forum to clarify today. A certain Pareto settled that a long time ago.

aber Holz dann möglichst mit Klinker...

This is nonsense in light of your motivation, because that is a considerably more elaborate visual layer than plaster, and inefficient as an energetically sensible wall layer. Constructively, it is misleading to pretend a house is built in the NF stone format when it actually consists of plan bricks that each take three steps at once per course.

Sustainability and solid wood never go together, because wood only regrows if you cheat on the time factor: if a tree trunk grows for 200 years and you build your house from squared beams, the utilized cross-section has mathematically already been growing for over 300 years. If the house then stands for less time – e.g., because people like you, who in their self-perception advocate sustainability, would rather rebuild with the argument that you can hardly make that economically at new building level – then the claim of regrowth was already a lie.

It doesn’t help then if the construction workers come to the building site in carpooling rides with clean nuclear power cars.

The idea of looking for a breakeven point, although remaining 5% behind the latest state of the art would already be the proverbial golden egg, does not require the collective intelligence of a forum to clarify today. A certain Pareto settled that a long time ago.

That is nonsense in light of your motivation, because this is a significantly more complex optical layer than plaster, and inefficient as an energetically sensible wall layer. Constructively, it is deceptive to pretend a house built in NF stone format when it actually consists of plan bricks, which take three steps at a time per layer.

Sustainability and solid wood never go together, because wood only regrows if you cheat with the time factor: if a tree trunk grows for 200 years and you build your house out of square beams from it, this used cross-section has already grown for over 300 years mathematically. If the house then stands for less time — e.g., because people like you, who advocate sustainability from their self-perception, prefer to rebuild rather than making it economically viable at a level of nine — then the regrowth was already a lie.

Then it doesn't help if the construction workers come to the building site in carpooling with clean nuclear power cars

Again ... no one “has to“ waste their time here and I don’t want to annoy anyone!

If you don’t like it, 11ant. Don’t bother yourself with it ...

Thanks to all others for the suggestions!

Low energy consumption means (for me) that the energy does not even have to be generated in the first place?!

Yes; and that is not given in new buildings because the raw materials for new construction do not fall from the sky.

Exactly such long distances I want to avoid

Then, as I said, it will be significantly more in new buildings than you want to spend.

Yes; and that is already not given in new construction because the raw materials for new construction do not fall from the sky. Then, as I said, in new construction it will be significantly more than you want to spend.

Can this be specified more precisely?

Hm, Nienburg to Süderelbe is over 100km by car. Does FFM then count as the "extremely strongly extended Hamburg metropolitan area"?

What does Nienburg have to do with it? By the way, the Hamburg S-Bahn goes to Stade.

On topic: I am building a good piece further away from Hamburg (one could say flat Lower Saxony), but bigger (170 sqm), however I don't pay too much attention to sustainability and will achieve the KFW55 standard without getting it certified. As of today (before construction starts), the whole thing will cost about 400k excluding land (otherwise all in with some extras, landscaping and all upgrade samples).

Can you specify that much more precisely?

120 sqm x 2 x 2000 = 480,000 Euros
+ outdoor facilities + basement + garage/carport + incidental construction costs + higher energy standard + more expensive materials (e.g. clay plaster) minus own labor

You want to spend max 600,000 minus land.
Without a calculator, there is a massive difference