Can you narrow down the type of construction? On the one hand, it could still be something from the 1950s, when there was a shortage and housing had to be created as quickly and cheaply as possible for returning soldiers etc. (cf. [Siedlungshaus]). In that case, the substance is often worthy of demolition because the material quality, execution, etc. do not allow for economical renovation. Or it is already higher-quality construction for that time, which can be seen, for example, in wall thickness, concrete ceilings, flooring, type of heating. Can you find out for whom the residential area was built back then? Workers, disabled veterans, or rather for the settlement of doctors and engineers for reconstruction? And if it is the latter, then little renovation might even be good. Less problematic renovation products from the 70s/80s and easier dismantling for replacement.