House purchase single-family house built in 77 how to assess?

Hello everyone,

we (both in our mid-30s with 2 small children) have the opportunity to buy a house and are asking ourselves how to "best go about it."

The prefabricated house was built in 1977, 160m² living space, 650m² plot.
Basement, partly with radiators and ceiling height of 2m, solidly built, attic not insulated, original roof.
Electrical wiring and water pipes probably never renewed.
Viessmann gas central heating from 2019.
Purchase price 365,000€

So we still know relatively little.

What we basically wonder:

- How do we proceed most sensibly as complete laymen? Who should we approach to do this in the most sensible way? Call a building surveyor right away on Monday who then looks at the house with us? He would then assess the building condition and possibly harmful substances in the wall construction?
- Does buying a prefabricated house from 1977 even make sense if you intend to live in it until death (God willing, about 40-50 years), since we read something about a durability of 50 to a maximum of 90 years depending on the year of construction. And since the 45-year-old house is not a modern prefabricated house, the wall construction of the house, according to these assessments, would soon be at the end of its lifespan.

I know these are absolute beginner questions… precisely for that, thank you very much in advance for the assessments.

Greetings
Andreas

Have you visited it yet? There are houses that are significantly older than 90 years. Year of construction 1977 is usually not a problem if the house has always been well maintained.

Is it a solid house?

The selling price is determined by the market nowadays. Unfortunately, it no longer has anything to do with the value.

If you like the property and the house, then visit again with an expert and calculate the renovation and remodeling costs.

Are there plans of the house?

It is a prefabricated house built with a wooden frame construction. The plans will be given to us on Monday. We were in the house for the first time yesterday.

And did you take photos? What is the first impression?

I would have a look here.

https://www.hausbau-forum.de/threads/kaufmoeglichkeit-efh-80ziger-jahre-risiko.44351/

The price seems very expensive to me for a prefabricated house from that year of construction and with a plot of that size, if it does not border a metropolis.

We live in the Ostalbkreis. The price for building land in the town is €495 per m². It is not cheap, no. But something significantly cheaper has not been offered here for years.