Floor plan discussion / Single-family house on an elongated plot with NE orientation

(Fishing, bicycles that shouldn’t be in the garage)

I assume you mean some second bicycles or bicycles currently not in use due to the children’s ages. And that you plan the current daily bicycles for the garage as marked. Otherwise, I consider bicycles in the basement, especially without an outside entrance, a bad idea. Speaking of the garage, the external dimension of "only" 6m catches my attention. To be able to place the bicycles in the corner there, the cars you drive must be really short. Ground floor … I think there is enough storage space. There is a sufficiently large cloakroom, the pantry (storage room) area for supplies but also for mops/vacuum cleaner etc. The window seat with storage (it should perhaps still be planned at seat height for the table). I would also plan a kitchen peninsula here with a depth of 120 cm; the 3-block kitchen (row, peninsula, tall cabinet block) can offer a lot of easily accessible storage. And the rest (I don’t see much of a rest) that you would put in this area must first be checked for necessity (decluttered) and otherwise create suitable storage space in the basement. That should be well organized from the start. --------- 12 sqm study room is basically completely sufficient. ---------

I understand that you like to be outside, that you like fishing etc., but primarily it’s about providing five adults with an adequate space.

I find the planned space quite adequate. Basically, everyone has an opportunity to withdraw from the common living area (3x children’s rooms, 1x study room in the basement with sufficient light, 1x guest room on the ground floor) and remaining together in the living area. The house has roughly about 160 sqm of living space on the ground and upper floors. If you include the definitely necessary areas from the basement with the upper floors and create even more storage there, you also close off some more floor area.

I hope for a "quieter spot" than on the ground floor

A soundproof door helps against noise, but not against permanent "Mom or Dad" disturbances with the door being loudly thrown open.

Ground floor study:

Nice that you see it as multifunctional. I bet this will be the preferred workspace.

Second level in the children's rooms: This is intended as a possible sleeping place for later. I have also thought that it might be cramped.

What’s really important are a fall protection and an ergonomically appropriate way up.. The children learn how to avoid bumping their heads.

Completely banishing the pantry from the ground floor would also offer a bit more space, but then there would be no place for the "open appliances"

With the pantry arrangement, a sliding door to the pantry behind the work surface would be possible. The countertop is simply extended into the pantry. This would result in a larger usable working depth in individual cases. In the past, there were “pass-throughs” from the kitchen to the dining room. This would then be a "work pass-through" from the kitchen to the pantry. This doesn’t have to be expensive; simply movable, easy-to-clean colored glass elements are completely sufficient.

Do you have any other ideas for more storage space?

Drawers for cutlery – depending on the region – in the dining table

What is a bicycle doing in the basement?

Standing securely, serving winter training on the roller, being modified.

What is a bicycle doing in the basement?

We (a family of four) have 4 bikes in the garage (currently in use) and 6 bikes in the basement (racing and gravel bikes and children's sizes, which are waiting for second use).

I am aware that people perceive things differently and also live in many different ways, so my view is no more than just an opinion. In principle, I would also have no problem having a basement under my house, because in the old house I had one and I myself have even lived a few times in basement apartments.
I had basically called the floor plan here successful, which is not often the case here, and if the original poster "wished" for a basement from the architect, he has handled the remaining space really well.
Nevertheless – and then I will leave it at my comments on this – this basement here is basically being dug into an almost flat plot of land, which will really cause immense additional costs. At least one, preferably two or three “light wells” will also slightly reduce the plot but will each cause further design costs.

I find the planned room quite appropriate. Everyone basically has the possibility to retreat from the common living area (3x children’s rooms, 1x study basement with sufficient light, 1x guest room on the ground floor) and can remain together in the living area.

Of course, it is sufficient; I myself have lived for a long time in considerably smaller spaces and was not unhappy. Likewise, there are also usage possibilities for a basement, but just over 40 sqm of general space is after all not large, at least not compared to what is mostly built here otherwise. I no longer like being in basement rooms, so personally I would never want to work there.

The house has roughly around 160 sqm of living space on the ground and upper floors.

I come to a lower sqm number.

It is ultimately simply a different kind of prioritization between living space and basement that I want to point out; with a sloped site I would probably see it differently, as the costs for that would also be significantly lower.
There are people here with experience. I would be interested in the related additional costs for this excavation, digging out, etc.

For the stairwell area, no square meters are printed on the floor plans, and I think that is missing when you add up the individual values. So I come to about 142.5 sqm of printed values plus 2x stairwell area. The TE even writes somewhere 165 ... but that doesn't quite fit. The interior area without the exterior walls is around 163 sqm on the two floors.

But, ultimately, it doesn’t really matter. What I just noticed on closer inspection is that the living room window at the drawn-in seating area seems to be just a typical “basement band” window. I would replace that with a window with a sill height of about 90 cm. It might cause glare on the TV during the day in winter, but the TV shouldn’t be that important, and you can always still use shutters or blinds.

You also can’t relocate every hobby workshop into a carport/garage extension. Especially if it’s a hobby mainly done in winter, the room should be heated.

And, I wouldn’t want a study in a real basement room either, but with a light well facing south, that should work. Alternatively, there is still Wiltshire’s suggestion.

The garden isn’t that huge either. For example, I like it less if there is a garden shed here and something to store there. I somehow find the basement more logical.

I also like the low roof pitch. With the orientation on the property, that’s not so bad for photovoltaics either, even though there is no purely south-facing roof side.

The OP even writes 165 somewhere ... but that doesn't quite fit. The interior area without the exterior walls is about 163 sqm on the two floors.

Maybe can enlighten us. I read it as if the plan WITHOUT the basement would have those 165 sqm.

We also set up a plan without a basement. For us, it's a "makeshift solution" with 165 sqm,