Cost to renovate a complete house

What do you mean by relationship? Yes, exactly, if so, everything would have to be redone, otherwise it doesn't make sense for us.

I mean what the targeted property costs in relation to other properties in the area. If the others are significantly more expensive and the targeted property is a bargain, there may be a reason for that.

By the way, I mean a full renovation is not cheaper than a new build. In any case, I would calculate cautiously.

Unfortunately, it is also difficult to estimate how much the costs for a new building of this size would be. Comparisons to other properties would be good, but here in the area, you can be glad if anything at all comes onto the market, so unfortunately that is not possible. As I said, the only thing I can say is that overall it costs 100-190k € more than the pure value of the land.

As a new build, we probably couldn't afford it, the question is whether as a renovation project...

The nice thing about an old building is the relative flexibility. With a pure house value of 200k, I would expect that the components have indeed passed their peak, but not necessarily everything needs to be renewed immediately. For example, why shouldn't the gas boiler from 2005 still run for another 5 years? Do the windows from '93 really have to be replaced, or are they just no longer so nice? Do you need a freshly paved driveway, or can the car still stand just as well on the old bumpy track for a few more years? Is the mere knowledge of the 70-year-old roof reason enough to re-roof it immediately?

What I want to say is: As desirable as a complete renovation certainly is for the builders, there is nothing against continuing to use existing, intact components initially if money actually becomes tight.

Otherwise, the substance (basement, masonry, roof structure) can be quickly assessed by an expert, and if that fits, you have definitely already saved quite a bit of money with an old building in comparison, in my opinion (unless you are planning radical changes to the floor plan).

We do not want to change the floor plan itself except for removing one non-load-bearing wall, moving one non-load-bearing wall, and possibly installing a new bathroom. We desire a new building, but since it is very difficult to realize due to the lack of available building plots, an old house is already a compromise for us. Therefore, we cannot imagine continuing to use the old things. Most of the things we want to change can probably be implemented more easily and cheaply as part of a complete renovation than afterwards. And we want to make the best possible use of the KfW funding. We now have a new building; living in an old building would be a deterioration for us in this regard, which the large plot cannot compensate for. We will continue to consider the property and simultaneously look at other houses.

The nice thing about an old building is the relative flexibility.

I can only agree with that! Being able to simply say "the old garage will stay for a few more years" can make the difference between a great house with an old garage and a standard house with a standard garage.

And depending on the planned time horizon, at least a few things can be done, especially regarding demolition stuff. I was surprised how much can be accomplished on average with 3 people in a "half week" (Wed-Sat). Much of it can really be done even as a minimally craft-interested "desk worker," and especially clearing out and carrying out debris, removing old doors, etc., simply takes several hours, which would also cost money with a professional. And if you can't just "work more" yourself to regularly earn more money, you simply save there.