Single-family house with a separate apartment currently for 2 adults, children planned

Take a finished GU floor plan (I don't really know all the providers... Gussek Haus, Bien-Zenker, Town & Country and who knows what else)

"Weiß der Geier" must be some regional provider and I would prefer it over the (pseudo) nationwide big names – both for the "massive" and the "prefabricated" builders.

I’m not a professional in this area, but I wonder: if I am so old/frail/whatever that I can’t even use a stairlift, can I still live in the house at all, or does that even make sense?

I see that with my grandparents – a 24-hour caregiver in the house because they don’t want to go to a nursing home and that only works because it’s reasonably barrier-free. A stairlift wouldn’t (any longer) work there. Or, even if (hopefully) it doesn’t happen, the (temporary) use of a wheelchair after an accident. Just a broken leg is enough to be happy about having a bedroom on the ground floor.

I see a design about 14 meters wide and 8 meters long.
(That’s about 110sqm living space per floor)
If we provide the design with some strong and insulated exterior walls, we’re at 14.8 x 8.8 external dimensions.

Thanks for the note about the wall thicknesses.

That’s also why the designation “pilot” is used

One does not exclude the other.
But as you can see right now, one job is only conditionally crisis-proof, and I don’t mean caregiving.

That also explains the relatively low budget set, which according to the bank adviser still has a lot of room upwards.

This came up last in this topic (quite far back):

Thanks for the link.

Maybe the same area, but how much space do you REALLY need?
If you leave out the granny flat with the same external dimensions, you’d have already gained so much space! And voilà, “saved” 100,000€ (see ypg’s calculation)

Hopefully you lean towards: No, we don’t need it.
What good is your own house if it’s not your own = sole house?

We tend towards no, too. Among other reasons, that’s why I started the discussion here, to get other perspectives on the topic as well. At some point, you just keep going around in circles yourself.

And we actually wanted to look at prefab houses during the Easter holidays, but that won’t happen now. So for now, there are only catalogs and pondering.

Thanks to you all!!!

"Weiß der Geier" must be a regional provider and would be preferred by me over the (pseudo) nationwide big names – both for the "Massiv" and the "Fertig" builders.

You fool! I already said I don't know much about it, so only the companies whose names I've heard somewhere come to mind. And... do regional ones have catalogs/online floor plans? My idea was that would first look at the floor plans until we are allowed to visit model homes or regional providers again.

You fool!

I know!
To me, "weiß der Geier" seemed quite a fitting representative or collective term for the genre of owner-operated regional builders from raw to turnkey construction, who, without having hired a "brand designer" for their company name, simply call themselves "Massivbau Schmitz," "Vinzenz Huber & Sohn," or something similar. You don't have to go to "Peter von Frosta" – any resemblance to real market participants is purely coincidental – because they're not really better, just their marketing departments.

And... are there catalogs/online floor plans for the regional ones? My idea was that @AndreaT would first just look at the floor plans until one is allowed to visit model houses or regional providers again.

Yes, many of them have (PDF) catalogs of their building proposals, which I like to call "Janet 135," "Franzi 140," or similar here. And they can also be viewed online – on the usual, unglossy homepages programmed by the neighbor’s kid (because the regional ones don't hype the internet that much and prefer to invest in the toolset in their Ford Transits freshly leased every four years). For them, the foreman attended the newest mortar-sled training just two months ago – so it doesn’t matter at all if the homepage wishes "Happy New Year 2017" (better than the other way around!). : tell me your ZIP code area, then I’ll check who’s active there.

A clever man once told me: For the cost of a guest room that is occupied 10-20 times a year, you can pay for a hotel room for the guests for their entire lives. It never adds up! The same applies to a [Einliegerwohnung].

Don't you want to liven up your own thread a bit? You don't answer banal but essential questions...

How many square meters should it be in the end? The budget won't be sufficient, it says 300k including equipment...?! What about additional costs?

And this sentence:

That is also where the fairly low budget comes from, which according to the bank advisor still has a lot of leeway upwards.

is confusing. Where exactly does the low budget come from? What use is it to you if your bank advisor sets your monthly burden for you? You should specify that! Some have calculated here that with your plan you will not be tight on budget but will overshoot it by miles....does money not matter? Then why state 300k and not just write "doesn't matter"?