Is building a house possible with our salaries? Your opinions

Users from metropolitan areas are simply used to completely different numbers, which is why I also refrained from having our income situation publicly evaluated here. Together we earn even a bit less than both of you, and thus one would certainly have also tried to talk us out of our house-building project right away, even though the ink under the loan and land purchase contracts has long since dried.
In my opinion, too much attention is paid here to what "comes in" and too little to what "goes out." I also work at a bank, and we have customers who earn 3,000 net, but somehow manage to spend almost all of that money by the end of the month, often even overdrawing their accounts. I would rather give a construction loan to someone who maybe only earns 2,000 net but lives like a Swabian housewife.

For an unmarried couple, it's still a rather modest idea to commit over €2000 per month. Plus practically no equity, desire for children at the same time as building the house, etc. If you already have two children and know that amount X is enough to live on, you can also go into that range with the salary, if you want to. Currently, I still find it irresponsible.

...so you would give the OP a 600k loan with the known income but still before family planning that is just about to start?

Of course, so far we have always spent our money well, but that’s totally fine, if not in your younger years, then when.

You guys, just for your information, the average income is currently 3246€ gross (West Germany).