Financial requirements for building a prefabricated house

However, this price does not yet include special requests, the base slab, house connections, earthworks, etc. (from my experience).

This price does not yet include extra requests, the base slab, house connections, earthworks, etc. (from my experience).

Yes, I know - house connection, base slab, earthworks, base slab etc. I have summarized in the calculation of land costs and are not included in the 135,000 +25%. So it is an additional item.

You are summarizing the costs incorrectly. There are land and incidental construction costs. In addition, there are house costs, equipment costs, costs for own work, as well as outdoor facilities. You cannot take a general buffer for costs that are guaranteed to come up for you. A buffer is meant to cover unforeseen expenses and is usually already spent before the own work begins. You also have to read the link for the house and incidental construction costs correctly. Doesn’t it seem strange to you that your calculation is below the 150,000 price segment, while everyone else in this forum is far above the 200,000 EUR mark??

Uh, all in all I come to about 280,000. Possibly a misunderstanding?

Just have an offer made for the [desired house], then you have a large item relatively fixed in the calculation.

Ok, maybe I also summarized the costs incorrectly.

I'll take your breakdown then:

Land costs: 70,000 + 4,900 incidental purchase costs
Additional construction costs: 21,000
House costs: 135,000
Equipment costs: 33,750
Own labor costs: 10,000
Outdoor facilities: 15,000
Buffer: 20,000 (increased again)

Hmm - it seems I must have estimated something too low.