New construction single - Civil servant permanent service realistic?

That only depends on which samples you look at. Good friends of ours pay 2,500€ per year for 700 sqm in the Munich area with good infrastructure. And you only have to finance the house first, not an additional 200k-300k for a plot of land in a comparable location...

For 700 sqm, 200-300k would be a great bargain. You’re easily looking at 600-900k.

That only depends on which samples you look at. Good friends of ours pay 2500€ per year for 700sqm in the Munich catchment area with good infrastructure. And you first only have to finance the house, not also 200k-300k for a plot of land in a comparable location...

That is then a stroke of luck.
Here, for new contracts, usually 4% of the land value per year is due; in your example, that would be a hefty 12,000€.
Why that doesn't pay off with the current construction interest rates is probably obvious.

First of all, thanks for all your input.
That the Wendland feels like the end of the world is obvious. It will probably still take a while before a highway runs through here.
I will first try to find a long-term place to stay (small terraced house or nicer apartment) and use the time to save up as much equity as possible.

At the moment, there is a nice detached house online for just under 190k. If something like that comes my way in 5-6 years, I might possibly take the chance. I am ruling out a new build for the foreseeable future, although I won’t move for the next 15-20 years for love, since I will stay directly with my junior.

The price is really hot, I think..... The price/performance ratio is almost optimal.

But for me (referring to the initial question) could I buy something like that in 4-5 years? A bank should give me 200k?

My then saved equity will probably go into additional costs, furniture, possibly minor changes to the house.
Or would a bank reject that?

I also like the house, I would take something like that.
For me, the prices in other regions are just unbelievable. You basically have to earn five figures there.

You can already buy the house today.
Additional costs are covered, the rest you can easily finance.
Roughly calculated:
198,000 purchase price
9,900 property transfer tax
3,465 notary and land registry
9,425 broker

220,790 total costs - equity 25,000
Financing 195,790
20 years fixed interest, 3% repayment, 2.5% interest results in a monthly rate of ~890€.
After 20 years a residual debt of ~44,000€ if you don’t make any special repayments.
With your 3200 net income, this is quite manageable.