Retrofitting old building with new gas heating cost

whether the windows and doors are still okay, I am concerned about the gas heating, whether the price will be rather expensive or if it is worthwhile.

From when is the house, for example with the storage heaters? There would be quite different things to consider than the doors.

1922 last modernization 1985 don't know if I am allowed to post the link from [Immobilien Scout].

The scout id itself always works.

Still the original water and sewage pipes in place? Or what does last modernization mean?

Unfortunately, I only found out on Sunday, no appointment was possible in advance.

Scout-ID: 96592598

Without having any idea, but I think the heating will be the least of the problems. There must be a reason why there are only pictures from the outside and none from the inside. Especially in the context of "renovierungsbedürftig". I'm curious to hear what you have to say.

Of course, I will first take a careful look and not be hasty, so beforehand your opinion, for example on what to pay attention to. New management etc. is already something.