Improve floor plan single-family house 1 1/2 stories

I have a problem understanding the why and wherefore – because you perhaps don’t even explain why it has to be so complicated?!
I also have a problem understanding – assuming it is a good and reasonably sensible plan – why parking spaces are distributed so strangely on the property.

I have looked at many floor plans here in the forum, but under similar conditions I had the impression that the discussion always ended with building the house as a single-family home only, without dividing it before (or after) single-family home use.

You can’t compare the conditions if a builder only wants to build a granny flat under or above their own living area just to save costs. That’s two different things – or are you talking about cost savings? I read that you primarily want to rent out. At least for the first 10 years, at least the upper part. A holiday apartment is to be built downstairs.

Why should the house be built at all? Do you want an investment? Do you want a holiday apartment and to be an entrepreneur, or do you want a home for yourselves (whoever that is)? You build the house accordingly.

But among acquaintances and friends I see that old houses are divided into several apartments or old houses with several tiny apartments are converted into a single-family home.

That is because the current house no longer meets their needs and no longer makes them happy.
But you can also recognize from your sentence that you can’t please everyone in every situation: one person downsizes, another enlarges their home.

An example from the internet, quickly found at Scanhaus Marlow, where I can see at a glance that it is possible to separate the ground floor and upper floor with few means if you make compromises in living quality and size.



But first the question is: what do you basically want?

So, some prefabricated house providers also have houses for 2 families in their program. [...] You can certainly find something better, just to get a feel for something like that.

But that doesn’t meet the OP where he currently stands. He is currently dealing with houses made from basement materials and floor plan concepts like the ones I devised as a Quartaner. What comes off the shelf apparently doesn’t appeal to him.

Here is first the requested single-family house version of the initial draft, not yet improved in any way, just as an answer to one of the first questions

I do not understand the wild staircase layout on the ground floor at all.

The bathroom on the upper floor wastes a lot of space, but a shower cannot be placed.

As a closet user in the master bedroom, the closet must have no doors or be under 200 cm tall. And the user should also not be too tall.

On the ground floor... what is that worm-like extension from the kitchen towards the bathroom supposed to be?

This way, it will not work at all.

Something different: You write about a limited budget. What budget do you have available? Only then can we properly help you with regard to dimensions.

200,000 (two hundred thousand)

Otherwise: 1 1/2 stories --> sloping roof? You won’t have much fun showering with such a small bathroom. And you won’t want to always get out of the bathtub in the long run. By the way, this is also not entirely safe for a small child.

The bathtub in the attic is half outside the 2-meter line. I have often seen worse in old buildings. The alternative would be, for example, only a shower in the attic, which could be completely outside the sloping roof. I will think about it again.

Then the bedrooms lack windows. But I think you have planned them, just not drawn.

Yes, in the revised single-family house version, the windows are included. In the initial post, all windows on the east side (two downstairs, two upstairs) are missing, for whatever reason. Obviously, it wouldn’t work without windows there.

Then a utility room is also missing. You have no basement, so plan at least 8 sqm for the district heating compact station and other stuff.

I can’t find space for a utility room in the 10 by 8 meters if there are supposed to be two residential units. I think part of the technology can go into the common room (ground floor, top left on the plan) and the rest into the attic. Is that unrealistic?

Why don’t you build a 100 sqm bungalow? There you can live much better for yourselves and arrange the rooms. In a few years you can easily add on.

Yes, a bungalow also seems more suitable to me. Unfortunately, on this building plot it would only be permitted if the roof were at least about 7 meters high. As I understand it, we cannot then have a cheap bungalow roof built (with thin vertical and diagonal beams for support in the middle) but must have a “proper” roof. You can save on the internal roof insulation if we leave the roof completely unused. But since the bungalow logically has to be larger than 8 by 10 meters, the roof will still be more expensive than for a small 1 1/2-story house where we would use the space under the roof. - Alternative suggestions welcome.

Does it have to be a duplex? Wouldn't it also be possible to design the house just for you?...

Why don't you build a house as you want it in 10 years and rent it out now? The children's room is later a guest or workroom. Total area a bit smaller, but no 2 bathrooms, no 2 kitchens, later no expensive renovation.

Yes, a normal prefabricated house would actually be the remaining alternative if a duplex prefabricated house and a duplex custom-designed house are not feasible with this budget.