Floor plan, house layout EFW 150m2, basement + granny flat - feedback desired

You still have room for improvement. The neighbors are higher. You have plenty of excavation material left over from the basement. Raise the house higher and spread the excavation material on your property. Then you will also have more light in the granny flat.

My granny flat is 80m2 and is on the ground floor and upper floor. I wouldn’t even have dared to offer the basement to the parents-in-law.

Is it worth it?

You can deduct a maximum of 40/190th. Don’t forget that the rent has to be taxed.

Here is a post that also wants to realize something like this.

https://www.hausbau-forum.de/threads/eckgrundstueck-mit-einliegerwohnung.48277/

There are already quite good proposals without a basement.

Such a granny flat only if you are near a university or if you are really building in/directly at the big city. Otherwise, it is and remains forever a pure nuisance for family use, as it is hardly rentable to others. Tax-wise it only makes sense if you are already quite old. When the depreciation (AfA) is used up, it hardly pays off anymore – unless you are then approaching retirement and no longer need advertising costs. For me, in the combination of the quality of the apartment and the cost/benefit ratio (tax-wise), it is actually too expensive.

Well, granting only 6m² of bedroom space to the elderly person in a 200m² apartment is just... borderline.
Take a few square meters from the living room of the granny flat.

Fair point. Why have we planned it differently so far? The bedroom is really intended just for sleeping and thus the space in the living room + kitchen is maximized, also because of the light incidence.

I can't contribute anything about the service phases.
Regarding the floor plan: there are no major blunders now. Personally, I am not a fan of a long narrow pantry. I would rather omit the pantry and plan the kitchen more generously and comfortably.

What would be smaller blunders then?
We would use it as a pantry / storage room and not put everything in the basement per se.

I rather have a problem accepting the granny flat as it is.

I don’t see the “together with” or “not alone” through the separate external staircase now. It’s definitely different whether you have a staircase inside the building or outside. Especially for an elderly person, because they may take somewhat longer on a staircase, rest pauses on the steps can be important, which tends to make the person stay inside the apartment and avoid the staircase.
Also, the outside view suggests a view outward. But if you consider the location of the basement apartment carefully, an average-sized person can only look at a concrete wall from inside. Although the terrace strip might be long and therefore large, it does not change the fact that it is an unattractive 2-meter wide strip, 2 meters below surface level.

There should definitely be two separate entrances. Therefore it is not “together with,” but rather a “not alone” and in very close proximity.
One consideration was to move the stairway forward and create landings here and there. Assuming we can raise the house by 60 cm and need 2-3 steps at the front, then we would need 3 fewer steps for the stairway. That would be 15-3 = 12 steps over almost 6 m, possibly over 5 m.

I want to pick up the word “emergency” and say: it is an emergency (makeshift) apartment. Who wants to rent that?

Of course it’s about opinions. Is it really that terrible? If I were single and appreciated the proximity to nature, I would personally have less of a problem with it. If I look at alternatives in our area, this hole does not even fall into the category of holes. There are several granny flats in the immediate vicinity that are at least partially buried. Hardly any of them even have a terrace or garden access.
Regarding wanting to rent it: what would that change? Move the granny flat completely to the ground floor?

Nothing to say about the sleeping basement now. In my opinion, I would arrange the sleeping area at the bottom of the plan anyway, the kitchen by the entrance. Then the underground terrace strip can be shorter and designed deeper in the sense of wider and attractive with planting towards the garden by way of a slope. Understandable?

If I understand correctly, “bottom of the plan” means next to the bathroom for you. I tried that quickly with simple Paint skills, without expanding the room. Did you mean roughly like in the attachment?

[ATTACH alt="0.1 KG.png"]89533[/ATTACH]

The terrace strip can be designed in any way. According to the architect, we have to support the house and the terrain there. It is cheaper not to let the strip run to the end of the house. We based ourselves on the two further attachments.

[ATTACH alt="0 KG Außenansicht Idee 2.jpg"]89534[/ATTACH]
[ATTACH width="233px" alt="0 KG Außenansicht Idee 2.png"]89535[/ATTACH]

That’s a joke.

It is multifunctional: working (clearly too large for that), guests (too rarely alone for that), storage space (books, odds and ends) and the basic concept possibly to later convert it into a bedroom in 30+. Why is the idea so bad?

I would rather take the city center. And I have to say I’m not a city person, but this basement apartment is out of the question for me.

Hello Hanse987,
Thanks for your opinion. What is acceptable for you? Does the apartment have to be taken out of the basement? Would it help to raise the basement? What about the design is problematic? From pure rejection, I hardly get any input that would help us improve the situation overall.
Do you have a granny flat or have you lived in a basement yourself and speak from experience?

In principle, we would not have an issue with moving it out of the basement. Due to the wish to keep the units separated, we have so far bitten our teeth on proposals that would make a granny flat on the ground floor significantly better. So far, the only option we have in mind would be to extend the granny flat to the northeast side. That would be narrow, also dark and would mean completely new ground and upper floor layouts. From all the standard floor plans by prefab builders, we could unfortunately draw little to no inspiration. Vie

When I look at your draft, these are all compromise solutions that are never really ideal. A granny flat in the basement – nobody wants to live like that. The slope is too shallow for a proper basement and the stairs are already an obstacle for those over 70 – especially in winter. Access to the living area through the kitchen is lousy and access to the pantry through kitchen furniture even worse.

Why is the pantry through the kitchen lousy? Because the door wears out? On the NO side, we have the neighbor. There stands an old brick bungalow. Semi-good to look at. Now we could do without the pantry and place the kitchen completely in the corner. Then we would have to take up the issue of storage room again. How would you access the living area? Another door next to the kitchen door to the living room and recess the wall for that? Then you have a small corner / a pillar there and look at the stairs. We like that less.

If the granny flat really has to be, then you should build it in a way that people actually want to live there. Please imagine you have to move in there next year! That means in my opinion at ground level with light and air without excavations – for example as an extension. The space you are currently “burning” for excavations is not big enough to really let light into the granny flat and to have a real terrace there. On the other hand, it is too big to still use the garden behind it sensibly. Then you might as well build on the area.

Does that mean you would do without the basement and place the granny flat on the ground floor? What conditions would need to be met for the granny flat to remain in the basement?

So you would forgo the basement and place the granny flat on the ground floor? What conditions would need to be met for the granny flat to remain in the basement?

Basement stays basement. If you want and can design it like in the pictures, that would help. But the floor plan is still not good.

Living space in the basement is expensive. The exterior facilities cost a lot of money.

How high is the groundwater level?