Baunebenkosten calculation realistic?

But can we get back to the topic?

Great idea

Are there any more comments on the incidental building costs?

We're actually pretty safe with the house costs, even if many can't believe that

How do you come to the conclusion that I am from Bavaria? But if you bark back like that, it seems I really hit a sore spot with Brandenburg Outback. You should get used to a rough tone on construction sites. I can only recommend it to you. Unlike your snobbish comment like "so anyone who even calculates over a few thousand euros should just give up." That never goes down well.

I am a straightforward person and can take criticism very well (it’s part of the job). If you had read more in the forum, you would have noticed that I also wrote that Brandenburg is the ugliest federal state in Germany. So you don’t hit a sore spot with me there. But you have to set priorities if you’re not rich. Either live in Brandenburg and have about a 45-minute ride to the center of Berlin by public transport, but almost a 1,500 sqm plot and a nice house, or live in a nicer region but have a very small plot and save on the house. It’s up to everyone. However, we will spend over 90% of our time either on the property/in the garden, in the house, or at work. That’s why the surroundings (the state) are secondary to us. If you want to go away and see something, there are cars/public transport.

Yes, yes. Enough now... this is not about you.

Back to topic:

Oh, one more thing I just remembered:
If it’s going to be a KfW 55 house, you also need an energy consultant. This can be partially subsidized by KfW and/or Bafa.

I read online about costs of around 600 euros for a 140 sqm house.

Additional construction costs could be appropriate, I personally have always rounded all amounts up to 1000 and added 15% to the total amount. This has proven to be good in that it provided a buffer that covered everything that has so far come up unpredictably. Otherwise, carefully examine what you get for the service. I already mentioned underfloor heating, as for example the packages of the companies can have particularly negative effects there.

Great idea

Are there any comments on the ancillary construction costs?

We are actually pretty safe with the house costs, even if many can't believe that

What about the item "Construction of the construction road"?

I have removed the post because the property is located on a road and we do not need to build a construction road