Loan for apartment in ZFH

I found an apartment that I would like to buy. It is an apartment in a semi-detached house. Here is the data: Year of construction 1990, new heat pump and solar 2 years ago, windows replaced on the upper floor, not yet on the top floor, electricity box replaced, bathroom and guest toilet modernized, living space 75 sqm. Some of the floors might have to be done and the kitchen would have to be installed, which is not included (it is in a 9sqm room). Otherwise nothing could be done. Purchase price including additional costs €446,000, owner