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

You don’t even let the forum rest on New Year’s Eve

Lying in bed with corona and bored, so Happy New Year!

[*
or just the basement apartment lower, since entrance is on the side, CP / SP with a slight slope and thus +/- 20cm/1m gradient or just 1-2 steps
[*]we don’t need a split level

Yep. As I said, the height level of the extension is freely selectable in this design, as it is completely decoupled from the main house. Accordingly, you can set it to an ideal level downwards without any excavations around it. The sloped driveway/path remains of course. After all, it is on a slope.

Once again to the anti-basement faction. Would you rather create living space above ground for storage purposes instead of a basement?

Always. No one wants to live permanently in the basement.

So far, we have assumed:

[*]Above ground = 3k / m2.
[*]Basement = 1k / m2 +
[LIST]
[*]8,800€ (excavation) + 14,080€ (disposal for soil class 4) + 2,400€ (drainage) + 6,000€ (additional insulation) = 31,280€
[*]plus stairs = 8k
[*]so 1.5k / m2

Ha! Never. If you create living space, it always costs the 3k no matter where. If you put it underground, it’ll be even more expensive because of all the stuff you mentioned above. Plus, no one wants to use it anyway. So it’s almost always nonsense.

Somewhere you also have to store bicycles, equipment, supplies, and other stuff.

For that, a cheap permit-free wooden shed is enough. You can already plan for that, but basically the city doesn’t care. However, for a large double garage with storage room, either the plot or your other wishes fit poorly.

For us, soil class 4 is silt. So the ground will probably need to be compacted on a slab.

That’s why people like to take a local construction company that knows about this. But with timber frame, the load isn’t that heavy either.
I find this more important for your digging:

The soil report indicates occasional pressing water.

That sounds like a waterproof shell (“white tub”) for a basement, which would be even more expensive. The issue of water on the slope does not seem to have concerned you at all yet.

You all prefer to create living space above ground for storage purposes instead of a basement?

Correct me. I had overlooked "for storage purposes." But I would rather convert the attic than build an additional basement, unless it's a flat roof. After all, that's already there anyway.

I forgot something else, and with that I also wish you a Happy New Year! I don’t have Corona, but I do have a dog, and not for long yet – you watch over him on a day/night like this. Parties are overrated, rituals are not.

In summer, no one sits in the living room, but in spring, autumn and winter you are just more often in the living room during the day and enjoy the brightness. That’s why we wouldn’t limit the open-plan area to the SO, no matter how we end up arranging kitchen / living room.

You just can’t please everyone. I also like lying on the sofa inside in the sun while it’s windy and cold outside. But what do you want to achieve, what is important? That’s individual: young families sit actively more at the table, others are constantly tinkering in the kitchen. Personally, it bothers me if I get up from the sun-flooded couch and constantly have to turn on the light in the kitchen. And within 20 minutes the spring/autumn/winter sun blues have anyway wandered away. However, this blues doesn’t happen often if you have to work and do the house and garden yourself. So, who sits on the sofa at 4 p.m. and relaxes? There’s always something: whether you’re gardening outside, painting a bench or planting, tidying up inside again, decorating or repairing or just leaving the house once in a while. Besides shopping, you’re also somewhere else sometimes. Personally, I would probably put less focus on the sofa corner.

I’d rather have the problem of the south side now and solve it than have no / too little light as a problem.

But you are planning a rather western terrace, while you say to my rather southern terrace that you don’t want that location. If I were you, I would always separate two things: the main outdoor place (i.e. the main terrace) and the light catch in the rooms. So, if something else comes up that you want to and can live with, that is also good. I personally don’t see anything set in stone. But I would also let a lot just happen. The pantry wouldn’t come about with me, because I would definitely have a window there. Doesn’t matter.

Do you all prefer to create above-ground living space for storage instead of a basement?

I once had a basement in my first own house: really wasn’t my thing, I didn’t like going down there. I get along well with my small utility room upstairs and freezer in the ground floor. You just need accessible storage rooms that you can take with you in your daily work and that don’t cause an extra trip like the basement does. You can also see here that pantry and office are planned for nearby storage anyway. Then why have yet another storage room? You don’t build an expensive basement just to temporarily park a piece of furniture that is to be sold on classifieds, do you?! Or why should you constantly haul the garden tools up and down stairs? That’s effort and would cost me too much energy resources. That’s actually the time you should better be spending on the sofa.

Basement Once again to the anti-basement faction. You all prefer to create storage space above ground instead of basements? Utility rooms and technical rooms aside. Bicycles, equipment, supplies, and other stuff need to be stored somewhere.

No. Since the bicycles don’t rot away in the basement but are used, they are either kept in the small shed in the garden (with all the gardening tools, etc.), in the garage (perhaps with an extension/addition as a workshop), or in the separate bicycle garage. Supplies are stored in the spacious and well-designed kitchen – only the 6-packs of drinks are not. Some things go into the utility room. Other stuff disappears into the attic, since things like suitcases, Christmas decorations, or similar are only needed once a year. With a bit of planning, you neither need the utility space in the basement nor above-ground living space. P.S. I myself have about 100 sqm of basement in an old building, but actually only the stuff is kept in the basement. The rest, as written above.

You have mentioned tree stock several times. Where is the old tree stock?

You have mentioned tree stock several times. Where is the old tree stock?

The entire OSW flank. Everything included from deciduous trees in the east, two chestnuts in the south, and spruces all the way to the west. All historically grown. That is why we are concerned not to make the house too wide.