Plot 1250m², living area 200m², 4-person household

Dear readers,
we have purchased a plot of land in the rural area of the Eifel and plan to build a house there next year. We would like to discuss our floor plan with you and already have some questions:

The arrangement of the house on the plot is shown in the site plan: Parcel 74 would be that. The house of my brother is marked in red.

How is the leveling of the plot possible (L-beams, etc., what costs approximately)? The plot has not yet been surveyed by us, so we do not have exact measurements, especially regarding the height difference. Roughly estimated, there is a difference of 3-4 meters between the highest and lowest points of the plot. We are quite in the dark when it comes to incidental construction costs and specifically earthworks.
So much about the plot and the planned position of the house. Mainly, this thread should be about the floor plan itself, to which we would like to read your comments!

Preliminary questionnaire:

Development plan/restrictions
Size of the plot	1249 m2
Slope	Yes, approx. 3-4m difference between top and bottom edge
Floor area ratio	Only distance to the street 3m
Plot ratio	Free
Building window, building line and boundary	-
Edge development	-
Number of parking spaces	2 cars in the garage + 2 cars possible in front of the garage
Number of floors	2 full floors, no basement
Roof shape	Hipped roof
Architectural style	City villa
Orientation	Living room facing southwest
Maximum height/limitations	None
Further requirements	None
Clients’ requirements
Architectural style, roof shape, building type	City villa, hipped roof, single-family house
Basement, floors	0, 2
Number of people, age	Currently 2 people (24 & 28), later 2 children
Space requirements on ground floor and upper floor	Approx. 100m2 living space per floor
Office: family use or home office?	A “leisure” office for 2 people together
Overnight guests per year	Approx. 30, sometimes 4-8 at the same time
Open or closed architecture	Open living/dining area including kitchen (separated from the rest by a door); open space above the entrance area
Conservative or modern construction	Modern (prefabricated house)
Open kitchen, kitchen island	Yes, yes
Number of dining seats	6 permanently, table extendable to 10
Fireplace	Hole pre-drilled in the wall to have the option later, but no fireplace initially
Music/stereo wall	No
Balcony, roof terrace	No
Garage, carport	Double garage with storage room (6x9m?)
Utility garden, greenhouse	Possibly later (raised) beds and tomato house
Further wishes/special features/daily routine, also reasons why this or that should or shouldn’t be	[*]We want to look from the living area & office & bedroom into the garden [*]On the ground floor, a shower bathroom next to the guest room [*]Dog flap - unclear where? [*]Enough storage space? (there is still quite a lot of space under the roof & storage under the stairs)
	[*]
House design
Who made the design:	By ourselves & prefabricated house company
- Planner of a construction company	Yes
- Architect	/
- Do-it-Yourself	Possibly soft ground works, wallpapering, door (frames) Definitely: insulate the attic & put in flooring
What do you especially like? Why?	Lots of space, room layout, orientation to the garden, large kitchen
What do you not like? Why?	[*]Enough storage space? [*]Window size unclear (e.g. whether floor-to-ceiling; who can look in?) [*]Where does the electric dog flap go? [*]Is some kind of wood (look) flooring in the living area possible (we want a dog later) or really a bad idea? [*]Children’s bathroom quite large [*]Possibly a different staircase?
Price estimate according to architect/planner:	400k
Personal price limit for the house, including equipment:	550k (including incidental costs), excluding garden installation
Preferred heating technology:	Air heat pump + photovoltaics
If you have to do without, on which details/extensions
- can you do without:	Fireplace pre-drilling, open space, bathtub, passage from kitchen directly into storage room (under consideration),
- cannot do without:	Many windows facing the garden, open living area, dressing room separated from bedroom,
Why is the design as it is now? For example
Standard design from the planner?	All room sizes & room layout were planned according to our wishes.
Corresponding/which wishes were implemented by the architect?	(not at that stage yet)
A mix of many examples from various magazines...	Instagram says hi And various prefabricated house catalogs
What makes it particularly good or bad in your eyes?	We find it hard to imagine the floor plan in reality, would love to see it in 3D.
What is the most important/basic question about the floor plan summarized in 130 characters?	Is the room layout functional, with enough storage space, and still an open living feel in the living/dining area?

Further considerations:
Can the room layout still be optimized, e.g. for use after the children have left home?

How & where can a canopy for sun protection be installed well in front of the house on a terrace without taking away light inside the house?

The attached pictures are the ground floor and upper floor plans as well as a photo of the plot and a site plan.

Thanks so much in advance for your effort and input!

Please dimension the floor plan
Where is north?

How do you envision the outdoor area?
Where do you want to fill in?
How much height difference is allocated to the building area?

?? What can one say about a floor plan where the walls have no dimension chains?

Are at least the furniture shown with realistic dimensions?

The dining area should, for example, be no less than 3m wide; if frozen goods or something similar are also to be stored in the storage room, then the room must have a clear width of at least 130cm, etc.

The site plan is oriented to the north, but I’ve redrawn it anyway.
We imagine the outdoor area as a terrace on the west side, with the rest of the property mainly lawn/trees. The first idea is that this exact space from the terrace to the westernmost point of the property is level, if possible.
Within the building envelope, the height difference is about 1.50m.

The furniture has realistic dimensions; I have edited the exterior dimensions again, no idea why they disappeared. The program does not show the dimensions of the individual interior walls like that. But I am happy to consider alternative suggestions for another program.

One more thing: Can I edit the main post? Then I would update the pictures there directly.

So the living room faces south? Please [Norden] or arrow Please dimension the rooms Program, affordable, intuitive Pencil and graph paper. Terrace with backfill and then stairs slope to the rest of the garden

Yes, it would be towards Southwest. All right, I'll see when I can manage to dimension the plan with interior walls as well and then post it here again. Thanks already!