Financing check - realistic or nonsense?

200 sqm living space plus a 40 sqm granny flat plus a cellar and all on a hillside property? I don't think the estimated costs even come close... although there are some people in the forum who can probably roughly say something about the additional costs... But this supposed financing amount of probably overall around 600k minus the equity you want to manage with a household income of 3.6k? Honestly, I find that almost crazy...

Stop, you misunderstood something - not plus, but all together. All 3 floors - finished cellar, ground floor and attic floor, together have 200 sqm. The granny flat is already included, so 160+40.

Calculate roughly with 2,300-2,500 sqm for developed living space. 80k for a pure utility basement (white tank possibly more expensive). 20k for additional construction costs, 30k for earthworks and disposal, 40-80k for the garden, 10-30k for a carport or double garage. By the way, I myself built a hillside house with 240 sqm on a large plot.

465k is a large loan amount for a calculable income of 3.8k.
Is the bonus fixed or dependent on the company’s success?
Can/will your partner contribute to the loan at some point?

1. I agree completely – that is, in my opinion, also the upper limit (there’s no more from the bank anyway).
2. The bonus is fixed or depends on my personal performance. Normally, it is given like that.
3. Currently, she cannot, but in the future that might be possible; however, due to a chronic illness, she is not fully capable of working (but "unfortunately" also not so sick that she would receive support from the state).

Otherwise, I think it looks very tight. And I am someone who has typically financed on the “tight” side.
What you apparently haven’t considered, as far as I can see: even after the construction, you can’t completely disregard savings rates. The possibilities to set something aside for: maintenance of the house, major purchases, retirement provision would no longer be particularly given with your current income.

You’re right, I really didn’t calculate maintenance. I definitely need to include that.

I will leave the unreported hobby dog breeding unmentioned, which, I suppose, is circumventing taxes. Except for the concern that such things tend to be discovered sooner or later and can become really expensive. At the latest then, the house would be with the next owners anyway.

Unfortunately, I could tell you several pages about our experiences with that. The short version is: We would like to pay taxes on it, but are not “allowed” to. Thus, we manage the income so that after deducting the (partly calculated) costs for feed, vet, insurance, blankets, outdoor facilities, shears, etc., there is no income left. That way, we are on the safe side.

So the house costs approximately 460-500k. Plus incidental construction costs, garage/carport, earthworks/depot, exterior facilities

I am a bit confused: you don’t just get subsidized cash in hand, do you? Please clarify for me, e.g. , I built in 2013.. back then there were KfW subsidies via interest rates…
Regarding the rest: ancillary construction costs are estimated too low.
And regarding the garden design: do you want to have the entire 1600 sqm landscaped? One would rather plan an orchard meadow, not a landscaped promenade garden?!
The fundamental question: no bank will give you a loan for an oversized house with 3600€.
Anyone who doubts whether they can afford a house should simply plan a house that is financially feasible and not get megalomaniac right away ;)

Calculate roughly with 2,300-2,500 sqm for finished living space. 80k for a pure utility basement (white tank possibly more expensive). 20k for incidental construction costs, 30k for earthworks and disposal, 40-80k for the garden, 10-30k for carport or double garage.

By the way, I myself built an embankment house with 240 sqm on a large plot.

Is your basement completely underground or partly exposed? For us, only one wall would have earth against it, 3 walls are exposed. In total, approximately 300m3 of earth has to be moved for the basement. Do you still think 30k for earthworks is realistic?