House purchase - what investments will I face?

The agent's name is Bouwens, you can find him immediately on Google by entering the name.

Looks like a property that is priced appropriately for the location and condition (I myself live in the Lower Rhine region). One person says "I have to do everything and invest at least €300k in renovation," while another can live with the property as it is. No obvious major defects at first glance. Of course, the energy status with class H is discouraging. The previous owner must have paid a fortune heating with oil prices. But that is known to you.
As part of heating optimization or lowering the flow temperature, I would consider modern type 33 radiators.

Looks like a property priced appropriately for the location and condition (I myself live in the Lower Rhine region). One person says "I have to do everything and spend at least €300K on renovations," and the other can live with the property as it is.

The financing advisor from Dr. Klein determines a similar market value with his program, meaning it is not greatly overestimated. Through another site, I was able to determine the residential location as 2.5 (medium location); surrounding areas are mostly medium locations, occasionally also a good residential location within a few hundred meters.

I would buy the kitchen separately with a purchase contract, thereby reducing the purchase price somewhat and not including the kitchen in the incidental purchase costs. With some negotiating skills, there is still some room on the price.

No major defects initially to be found. Of course, the energy condition with class H is off-putting. The previous owner must have spent a fortune on heating with oil prices. But you are aware of that.
As part of an optimization of the heating system or lowering the flow temperature, I would consider modern type 33 radiators.

Yes, that might put some people off, although I think many from further away don’t specifically search in that town. I do have to drive 40 minutes to work, which I am doing now despite half the distance door-to-door, with the difference that I then mostly drive on country roads and highways in one go without traffic lights (around 95% of the route runs this way).

Thanks very much for the tip about the radiators. Those things are not getting any cheaper. Best to just replace them right away, then it’s done.
I also want to get to the windows. Do you see big savings potential or a reduction in emissions with triple glazing?

If I can send private messages or upload the document here, I will send the further information from the broker.

The financing advisor from Dr. Klein determines a similar market value with his program, meaning it is not greatly overestimated. Through another site, I was able to determine the residential area rating as 2.5 (middle location); around it, the residential area is mostly middle class, occasionally also a good residential area within a few hundred meters radius.

Check the residential area on site. A street side or a difference of 100m can already make a big difference. 15m across from a busy main road is already significantly better than right next to it. So always make your own impression – also at different times of the day.

Thanks for the tip about the radiator. Those things aren’t getting any cheaper either.

They are actually quite cheap online.

Do you see great potential savings or a reduction of emissions with triple glazing?

Savings potential definitely with better windows. But then please also insulate the reveal as much as possible. And pay attention to a ventilation concept. New windows = significantly tighter house (not because of the windows, but because of the airtight installation). And then mold can easily develop if not ventilated properly. Or the reveals become the coldest areas and in winter it’s no longer the panes that fog up, but the reveals absorb moisture.

I will now go there again after work during the week and also on the weekend (especially on Sunday, when there is a fair, to see if it is busy because of that; right across the street is a church). It is best if I also take a day off during the week and look at the situation on site. I will also talk to the people there and have them tell me a little about the place. There are inns to the

I know installers among my acquaintances, which is cheaper for me than the commissioned specialist company.

What is meant by the ventilation concept (if this is a "stupid question," I apologize)? A ventilation concept from the window builder or ventilation by me? I ventilate regularly and, I believe, also "correctly." Open the windows wide in the morning and let in fresh air, during the day tilt them – at least when it is not the ground floor or GF, if I am also there.

What is meant by the ventilation concept (if this is a "stupid question," sorry)? A ventilation concept from the window manufacturer or ventilation by me? I ventilate regularly and, I believe, "correctly." In the morning, I throw open the windows and let fresh air in, during the day they are tilted – at least when it is not the ground floor or, EG, when I am there too.

According to DIN 1946-6, the ventilation system of apartments must be implemented independently of the users: that is, it must work without the residents as well. For every new building and for every building to be modernized with ventilation-relevant changes, a ventilation concept must be created. The window manufacturer must therefore create a ventilation concept. This can be, for example, RegelAir, window rebate ventilation, controlled residential ventilation, manual opening and closing of windows, etc. What you do when ventilating, by the way, is completely wrong ventilation. Ventilation means opening all windows fully 3-5 times a day for a few minutes to let in fresh air. I have already seen tenants in a condominium where, after new windows were installed, there was significant mold exactly above the window. Of course, cold air comes in from outside, cools the window lintel, and the humid air from inside causes the corresponding moisture.

In my haste, I forgot to mention that as soon as I am back from work, I do the same as in the morning. I will optimize this in the future. Thanks for the hint.

Observe the area and discuss the price with the owners!?