Is building financing as an individual realistic?

the 100 times rule is always good, i.e. with €2,000 net income = €200,000 loan amount. the €260,000 could be represented "by hook or by crook", with the additional security (another mortgage on the parents' house) it would be positive for the bank's approval. Also very good interest rates (which is reflected in the installment) Questions: in the public sector, what income increases are to be expected in the next 2-4 years? how old is your father? Because if he is somewhat older (may he live very long), one can also later argue that either A) the parental home is sold, or B) it is rented out, thus generating additional income which in turn can compensate for the deficit in income/expenses (if the bank employee decides with foresight....)

Exactly, please include the parents' house for a luxury item. Absolutely. Also the grandparents'. So that you all eventually meet under the bridge....

Do you actually eat anything? It’s not included in the household budget. No clothes, no vacation... A lot is missing there.

Yes, based on your savings rate you have €350 plus cold rent €370 available for financing. However, additional costs for the house also apply – with property tax, waste disposal, sewage, etc. and insurance you can expect around €300. Doesn’t work, in my opinion.

You have an income of €2000. It would be healthy if you spent a maximum of one third on housing. That means: mortgage + gas/electricity + all additional costs like taxes, garbage, water, etc. Ultimately, with your €500 warm rent, you are already in a good range – there isn’t really much room for improvement there.

One of the calculators from the major mortgage brokers is helpful. If you calculate a €260,000 loan at a €260,000 value, 20 years fixed interest period, and 3% repayment (which would be reasonable today), you end up at almost €1000 – so too expensive for you. You can reduce the repayment rate to 2% – this initially gives you a little more financial breathing room each month, but it takes longer (still acceptable at your age) and you have the big risk that you will face a significant interest risk in 10 or 20 years.

All this, of course, only applies if a bank would even give you a loan. Your equity is very low, with 2% notary fees and additionally real estate transfer tax (at least 3.5%), you need at least €14,000 for the ancillary purchase costs.

You can probably somehow manage this with a savvy broker – then you might also take out a €10,000 consumer loan as "fresh" equity, etc. But will you be happy with that (amount of debt and debt service)?

Ultimately, a house today is hardly feasible for families with two incomes, so it is not surprising that it is even tougher as a single. Ask yourself if you want to commit yourself so early under 30, and whether this property is worth being financed beyond the normal housing costs. What if a partner moves in? Or a family is formed? Does that fit with the house?
I would rather tend to saving and waiting. In 10 years, the world will look completely different, and then you can still buy a nice little house – then with more equity and a higher experience level in the public sector.

That will not be feasible as is. Why did you want to sell within the family? Fear that it will be gone during the care phase?

Exactly, please include the parents' house as a luxury item. Absolutely. Also the grandparents'. So that you all eventually meet under the bridge....

but that comes with a lot of "pessimism" how far must the economy in Germany collapse there, alongside the real estate market?

in any case, the bank forecloses the apartment, some k of residual debt remains and the parents, grandparents live in their houses...

on the other hand: there are so many apartments missing in Germany that prices in metropolitan areas will rise at least double-digit again this year...

by the end of the year, inflation in the range of 3-4% will accelerate the whole thing even more...

and in 2022 the situation in the real estate market is unlikely to ease either, considering how many people have become homeless due to the flood disasters... (even though that is a very different and very sad story on its own)

The question remains what you want to do with a house. Of course, you can and should tackle something like that at a young age, but only if your life plan is foreseeable. You find a woman who doesn't want to live there or doesn't want to have a house. You still have children, the house is too small. You inherit the parental home at some point, then you have 2 houses. The job takes you somewhere else. And, and, and.

If you buy it to speculate and then sell it at a higher price, fine, you can do that. But you should make something off it because of the speculation tax. So I wouldn't tie that burden to your leg in your place. Especially since the financing is not exactly easy with your income.