Financing purchase project single-family house 580TE before upcoming parental leave

The 70k€ are modernization measures, such as bathrooms, flooring, kitchen, painting, possibly including windows (panes) etc. Insulation is not a must (so not immediately) here the basement ceiling could be insulated, external facade and roof

I still can't make it out. Please write specifically what you definitely expect for the 70k€ without using possibly and etc. Because for you 70k€ is a lot but read on... Because you won't get what you can get for 70k€ in a new build. I visited a colleague who renovated an 80s house. Main structure new (so core renovation) 30k€ gone, without much frills (well the bathtub was expensive but that's it) and that was 4-5 years ago.

I have not read (it is also possible that I overlooked it): how is the purchase price broken down? How much is still being charged for the house and how much for the sqm land?

We did not get the answer. There is a great garden, but whether it is a simple settlement house or a high-quality building of the former upper class, we do not know. Also nothing about the extension.

Ultimately, it is a house that still has a calculated life expectancy of 3-4 years, then it will be 70 years old. The bank will take this into account. The purchase price is €580,000, plus 10% incidental costs – so €60,000 or half of the equity. Then you need at least €120,000 for the basics, realistically significantly more. The total amount is therefore over €700,000 – with €60,000 equity, this clearly sounds like a no-go from the bank’s side.

Most of those who warn here about the renovation costs have built new. :) If you don't have to touch the statics, the roof, or the heating, or deal with the asbestos hell, then the costs can be kept quite well under control. And as an architect, you can also estimate them. I am currently renovating the third house in my life, and even this 200-year-old wreck costs no more than 150,000 euros with roof, heating, electricity, and insulation. There are also various subsidies, so that especially the energy-efficient renovation does not have to be fully borne. If the house has a good core and a good location, then a renovation can result in a very nice house.

I still can't make it out. Please write concretely what you definitely expect for the 70k€ without writing maybe and etc. Because for you, 70k€ is a lot but read on... Because for 70k€ you won't get what you would get for 70k€ in a new build. I was at a colleague's who renovated an 80s house. Main building new (so core renovation) 30k€ gone, without much frills (well, the bathtub was expensive but that was it) and that was 4-5 years ago.

Everything is too last minute for that. I think you can understand the situation that we don't have several weeks now to break everything down exactly. You have to react within a few days in the current times.
I have also only seen the house once for 20 minutes

And you think that you should spend 3/4 million euros without at least a somewhat exemplary calculation based on a 20-minute look? Have you already been to a financing advisor? They will also provide you with a systematic calculation of how the bank evaluates your property. And you can also calculate backwards with them – how much money you could still get for renovations, and how much equity you need.

If the house has a good core and a good location, then a renovation can result in a very nice house.

Apart from the garden, we don't know anything. And you don't get a great interest rate for a used house just like that... If it is a worn-down settlement house, then the house has an intrinsic value of? 700-1000€/sqm living space...? But I don't remember exactly anymore. The question is very simple: how much do plots cost in the area, and for what or how much is the house valued? Possibly overpriced? Or realistic? And then comes the personal standard. Only the OP can make the decision.

Most of those who warn about renovation costs here have built new. :) If you don’t have to touch the statics, the roof, or the heating, or deal with the asbestos hell, then the costs can be kept quite manageable. And as an architect, you can also estimate them. I am currently renovating the third house in my life and even this 200-year-old wreck costs no more than 150,000 euros with roof, heating, electricity, and insulation. There are also various subsidies, so that the energetic renovation is not fully borne. If the house has a good core and a good location, then a renovation can result in a very nice house.

How much of your own work? Please write down what you did yourself. Also, I’m saying it’s not my experience. It should be clear that he didn’t lift a finger and whether he compared offers is questionable. But that was also 5 years ago and should probably align well with current prices. So why do you find 30k€ in 2022 for a complete bathroom renovation unreasonable if everything is done by professionals?