Is my house building plan realistic?

Good. Then you bought a developed plot of land.
Without land acquisition costs (court, notary).

The land transfer tax in Bavaria is, I believe, still 3.5% (fantastic, here we have 6.5%). Notary was... 2%? I would have to check, I’m a layman, the number is not in my head (payments that annoyed me, I have suppressed and filed away... smile).

Save on the house? Save wherever you want.
Your total trade including the house may only cost the sum x.
The house itself is significantly cheaper.
Please take a look here in the forum at the permanently pinned post about construction incidental costs.
Tens of thousands of euros will hit you... actually, you could fill books with this. The contribution from the construction expert is actually quite concise.

Yes... it can make sense to save even 10-20k for the garage: if you simply don’t have the money for it.

And it’s everyone’s own business: But personally, I find the current craze where everyone builds huts like Rockefeller in "" for dubious luxury to be insane. Sure: If I can afford it, gladly. Living generously, like shown in living magazines and house magazines (note the prices) is great. If the money is there, cool beyond measure. Wonderful.

But what do I want for a family of three?
Ok. People, 140 sqm living space according to DIN is more than enough. I grew up in less and still live very well. And my lesson was: size things as you need them. Not too small, not too big.
In the same house I have, a building family I know distantly with 2 children lives.
My house is smaller than 140 sqm living space... it’s 110.
It doesn’t necessarily have to be 200 sqm. Even if it’s nice. But nice must remain feasible.

A tip for you:
Finish your construction calculation completely in Excel.
And please don’t forget the 1000 sqm garden... Creating such a facility: It’s crazy expensive (sorry).
And then consider: Do I want to live with the house, or for the house?
Do I just want to live month to month in worry – the house is big, but I shrink from worry?
Or do I have a house… everyone is super satisfied, you can live in it..?
The question: Only you and your wife can answer this fairly. For you.

You decide your future. Yourself.
And how big your fear factor is: also.

When your list is finished: Go to the bank...
They only pull lists anyway with BASEL II and III (agricultural credit lists, enclosed space, etc.) and then tell you the most exact numbers and results... I suspect my statements will be pretty much in line with what the people will tell you then. Of course +/-... I’m a layman.

Best regards
Thorsten

Fear factor...

Personally, with the (good) financial conditions, I would consider whether you can withstand a loan and numerous direct debits without feeling uneasy. There is a difference between being able to save well every month or watching all kinds of deductions on the account every month that you have no connection to.

I would approach it differently, now you have €4000 available and spend about €2000, the rest saved (without considering any relevant housing costs). So if you live in a house, more living expenses will come your way. You probably have a real surplus of €1000 with 2 full earners. As soon as parental leave starts, at least that will disappear. So I would plan for a child first, then a house, and save as much as possible in the meantime. Very few can predict how much children cost and how little a woman with a child is worth to an employer.

A significantly smaller plot (provided there are offers), a significantly smaller house, and you have saved 100,000 € on construction and land costs and still have a large plot with a large house. Then, with the same financing term, you have a significantly lower installment or, with the same installment, a significantly shorter term.

Fear factor...

Personally, with (good) financial conditions, I would think about whether you can firmly withstand a loan as well as numerous direct debits without having a bad feeling. There is a difference between being able to save well every month or observing all kinds of deductions on the account every month to which you have no relation.

So I cannot understand this statement, i.e., someone who can save well would have a harder time paying off a loan than someone who has never been able to save anything before?

I would approach it differently, now you have €4000 available and spend about €2000, the rest is saved (without considering relevant housing costs). So if you live in a house, more living expenses will come your way. You probably have a real surplus of about €1000 with 2 full earners. As soon as parental leave happens, at least that will disappear. So I would immediately plan for a child, then a house, and save as much as possible. Very few can predict how much children cost and how little a woman with a child is worth to an employer

So I currently calculate that we will have about €1500 left per month later. We are currently living well and are aware that we will have to restrict ourselves somewhat in some things later, which will free up a few hundred euros more per month. My salary has also increased on average by €100 net per month per year in recent years and will continue to do so in the future. The first period, especially parental leave, will certainly be a challenge and worries us. But once this time is over, I am actually less worried in the long term (at some point we will also inherit 2 houses, etc.).