House purchase and house construction - What can we afford

If you don't feel like dealing with your finances yourself, I would advise you to ask a fee-based advisor for advice (i.e. not the bank’s salesperson!).

100k in the daily allowance account is probably not financially wise. Similarly, it would probably not be financially wise to not take out a loan for the new house. Do you want to close the stock portfolio? In your situation, probably not financially wise either.

What to do with the condominium probably cannot be clarified as well on the internet as in a personal conversation.

Otherwise: Yes, in my opinion, you can afford a house for > 1 million.

The 100k in the Tagesgeld is actually very deliberately chosen per se. Simply as risk hedging, the rest (of both portfolios) are a classic ETF savings plan or ETF structuring. Basically, we would have already partially liquidated both portfolios to have equity.

We consciously do not want to take the bet "Are my capital gains higher than the interest." For a few months now, the monthly savings plans have therefore been deliberately directed more towards Tagesgeld or similar, so that we do not have to take risks there.

With such a large amount, it may be worth considering money market funds or ETFs or bonds instead of a daily savings account. I don’t know the interest rate on your [Tagesgeld], but by the time you buy the house, it could potentially bring in a few thousand euros. But anyway, each to their own and you can buy a house anyway. :)

With such a large amount, it might be worth considering money market funds or ETFs, or bonds instead of a savings account. I don’t know the interest rate on your savings account, but by the time you buy the house, it could possibly bring in a few thousand euros. But anyway, everyone as they see fit, and you can buy a house anyway. :)

Valid point - we do quite active account hopping. Currently, I think we have 3.75% each. But the idea is really good - I will take a closer look at it!

I think it comes from the fact that we both worked our way up a bit from "nothing" and we both come from... let's put it this way: modest circumstances (the "only" thing there is to inherit is my parents' house – although in recent years I have also helped my mother a lot so that the thing is paid off). We both started with a significant negative balance after finishing our studies. I think there is a strong discrepancy between our perceived and our actual reality.

Something about your story doesn't add up.
You claim to have studied, which means if you were quick, you have been working for about 10 years.
During that time, you claim to have accumulated assets of about 1 million euros from a savings rate of €5000 and also supported your parents? No way.

The apartment belongs to me alone and I spent the first years of my professional life in his - let's say very well-paying - industry. But at some point, I swapped the 70-80 hour weeks for 32 hours, which then correspondingly reduced the salary.
I got the apartment quite cheaply back then, it has increased in value by about 100% over the years (bought for 240,000 - neighboring apartments have changed hands for about 500-600,000 euros in recent months). During Corona, I also had an extremely lucky touch regarding leaving the stock market and re-entering it. Regarding the support for my mother, it was primarily to get her "debt-free," as my father passed away (this involved a relatively small sum - with which I was able to buy her a lot of peace of mind).
My first "fully taxable" year was 2012.
In addition, I only marginally raised my "way of life" above the student life.