Hello,
Prefabricated houses - are there also made from bricks (how do they hold up in terms of value retention, renovation,???)
A prefabricated house is always one where the walls are built with a wooden frame. It is completely irrelevant whether the frame is further processed in the manner of timber framing or more conventionally known, whether it is initially assembled in the factory or only erected on the construction site.
If solid construction houses are built using prefabricated walls - e.g., made from expanded clay - it is more correctly called a solid house made of prefabricated walls. In any case, the material remains consistently solid!
Solid... is aerated concrete really solid? Or such a highly porous brick - have you ever used a hammer drill on it?
Yes. They are and remain stones and not wood.
And how should prefabricated element ceilings or prefabricated roof trusses be evaluated (here someone glued together his house 'solid' from aerated concrete, and had the roof truss made in the factory by a larger carpentry and placed on the house - roof is on and watertight within one day).
That has nothing to do with the basic construction of the wood or stone (house body).
There are reasons why some people prefer to build 'solid', others prefer timber frame construction, and again
Agreed; it is mostly a purely gut decision.
others prefer 'solid wood' - does that then belong to 'solid' or 'prefab' house?
Prefabricated house. Although with this type of house - at least with log houses - the lending curve is more positive compared to the majority of prefabricated houses sold.
Value retention... is also difficult to answer. High-quality houses always perform better in the local market environment than dilapidated buildings, construction method hardly plays any role. The renovation effort can be considerable in both cases, but can also be very low in both cases - this has significantly more influence on the achievable purchase price than the construction method.
That is not correct. Prefabricated houses are assessed internally by banks with a lifespan of 60 years, solid houses with 80 years. First, for both variants, the sales price they could achieve in a well-maintained condition is calculated, then the costs of the necessary renovation are deducted. Only the location of the existing property distorts the sales price; it often drives the sales price up but says nothing about the difference between prefab house or solid house.
But you can also observe that some homeowners are dealing with lemons. My family and I could buy a prefab house from one provider in a desirable location with very few walls, but many windows. Top maintained, top location - but the good seller still believes after 2 years of sales efforts that he can achieve the original construction price as the sales price... sometimes location alone is not the decisive buying incentive. I am also not willing to pay significantly over EUR 700,000 for a prefab house - not even from this reputable provider - including land.
Durability? Usually does not play a role either. The oldest houses in our village all have a masonry base and on top a braced timber frame filled with straw and clay.
Actually increasingly again, since the market for well-maintained existing properties is exhausted. The houses you describe were built quite differently in terms of craftsmanship and therefore still justifiably achieve high sales prices today... if they have been consistently well cared for. Try asking for a construction price for this type of construction nowadays... then it quickly becomes clear why comparable construction is only done in exceptional cases today.
In summary, it can be stated that it always depends on the choice of the provider. The gut feeling exclusively decides whether a prefab or a solid house is preferred. By the way - even a low-cost provider solid house no longer achieves a particularly interesting sales price after just 10 years.
Best regards from the Rhineland