Purchase, construction, and full renovation of a single-family house affordable?

how high the GEZ was, I copied it over from a forum post as a template

Oh man, no, that is the remaining amount we save per month, I just took the template and adjusted the values!

What is still not correct, because it was taken/copied from others?

What exactly is still wrong because it was adopted/copied from others?

I have adjusted ALL values, only the GEZ not, as it is the same amount for everyone ;)

Oh man, no, that is the remainder we save per month, I just took the template and adjusted the values!

Then I wonder where the high savings rate goes. Your equity is practically one year of saving, plus there is the installment loan. That does not change the fact that it fits, but your spending behavior is different from what is stated here.

Loans? €500 installment loan

How much remaining debt do you have here? Also, scratch the €25,000 equity. That’s not money you have and can spend in the sense of reducing the loan amount. After deducting kitchen, furniture, and loan, you actually have €0 equity, even negative, since you still want to pay off your mother (illegally) an additional €28,000 on the side. But with €6k net, it’s all relatively irrelevant, you won’t overextend yourselves, even if the renovation costs double ;)

Then I ask myself where the high savings rate goes. Your equity is practically one year of saving, plus the installment loan. That does not change the fact that it fits, but your spending behavior is different from what is stated here.

It’s quite simple. Our income looked completely different six months ago! I’ve been in my position for 6 months now, my wife has been permanently employed for 9 months!

We have saved most of the €30,000 in recent months. Also, the opportunity with the house only arose at short notice (grandpa passed away).

Financially, we can definitely afford it despite lacking equity. That’s why we want to get out of renting as soon as possible. I also know that it’s not ideal, which is why I hope that the relatively low purchase price, our good income, and our own contribution will benefit us!

I want to calculate it again completely differently. Deliberately very conservative.

I could buy the plot + house for €100,000. The remaining €28,000 I can repay directly to my mother over the next few years.

So after all €128,000.

Extension of approx. 9x4 meters

How much living space might that be on two floors, 60? 60m²*€3000/m²=€180,000

Also a large dormer and a complete renovation

New roof, facade insulation (mandatory due to extension?) and the whole rest... I would say 100m² * €2000/m² = €200,000

That makes a total of €508,000. Equity goes towards kitchen, furnishings and buffer.

Loan amount therefore rounded €500,000. Slightly more than your estimate:

[*] Total house costs: €351,500 [..] [*] Financing amount: €325,000