Rough estimate of renovation effort / costs

Hello everyone, I am still looking and just viewed a house in the immediate neighborhood. The house is from the late 50s and let's say it is in good condition from the outside. Normally, I wouldn't dare something like this, but as I said, it is just around the corner and the property is very neat as well (just under 475 sqm). The roof was redone at some point (probably not that long ago), the windows are from the 90s, and there is a heat pump. That’s about it... Inside it looks like it’s from the 60s. That means all the floors would need to be done (mainly carpet currently), walls, and kitchen/bathrooms. I suppose one bathroom would be torn out and one bathroom completely redone. The electrical system would certainly need to be partially or completely redone, maybe also the water pipes. The staircase is nice, made of wood and covered with carpet. What I’m after now is a very, very rough estimate. I believe the seller is basically expecting a rather high price. Actually not far below what I basically want to spend on a house at all. But since I still want to make an offer to have a chance, I would like to estimate how much I would need to budget for a "moderate" renovation. I know it depends on so many factors, but is 100,000 enough or would it be more in the range of 150,000 to 200,000? With 100,000, I still see a chance to maybe make a competitive offer. If not, then it’s probably not going to work out. Aside from the fact that I actually don’t want to renovate that much.

Thanks a lot in advance for your assessment. Best regards

...the living area is 140sqm...I had forgotten, sorry.

Thanks already for your assessment. Best regards

Well, with €100k you can definitely achieve quite a bit with 140 sqm. But whether that’s enough ultimately depends on your standards. You write a lot of "would have to" or "possibly."
A completely new bathroom can cost €8k or €35k. Renewing floors = simply laying laminate over carpet or large-format tiles/parquet. Electrical work can be basic or complex. Windows from the 90s are already 30 years old and no longer quite up to today's "energy efficiency" standards.

The problem with this building year is that you never really know what you’ll find.

Find small craftsmen via MyHammer or eBay Classifieds. They are significantly cheaper. However, it’s also a bit of a lottery. But you should get quite far with €100k.

Conclusion: Roof, stairs, and presumably paint (outside) are okay, the rest please 1x NEW.

Is the room layout and size okay?

From this, one could derive any arbitrary amount…

Thank you for your assessment. Above all, the location fits and the garden. The house itself is okay in terms of layout. I could live well with the division of the rooms. Possibly one bathroom would have to be removed and a new one installed elsewhere. But that would be optional. Otherwise, especially the floors, everything mainly needs to be redone. A kitchen would need to be installed. So 100k would be manageable. Not more for now. But I would make an offer that, from my point of view, fits. Very likely that it is too little for the seller. But that's how it is then.

How realistic do you think the estimates for the price of a property actually are? I just used the tool from the bank with the red symbol. How meaningful is something like that? You have to specify location and property condition. As a guideline, it came out about 150,000 less than what I would have estimated based on what you usually hear.