Two-storey house with a basement in the vineyards

Hello everyone,

I recently registered in the forum because we would like to build within the next 2 years and want to optimize our floor plan before moving into concrete planning.

Since my husband is a winemaker, we are allowed to build on our outdoor hall in the outdoor area. Therefore, there is no development plan and no further regulations.

Development plan/restrictions
Size of the property 5000m2
Slight slope descending to the east (see photo)
Outdoor hall is located north of the house (40 meters away)

Number of parking spaces at and in the hall
Number of floors 2 full floors
Roof shape no specifications
Style no specifications
Orientation south, driveway from the north
Maximum heights/limitations
No further specifications

Requirements of the builders
Solid house
Style: modern
Roof shape: gable roof
Basement: yes
Floors 2
Number of people 2, 2 children desired
Age: both 29
Room requirements on the ground floor: office (later bedroom), kitchen, living and dining room, WC with shower, small storage room. The ground floor should later be separable and barrier-free.
Upper floor: family bathroom, bedroom, 2 children’s rooms
Office: home office (teacher and winemaker)
Overnight guests per year: 8 (in the hobby room (basement))
Closed architecture
Closed kitchen with pass-through
Number of dining places: 6 expandable to 12 (for parties)
Fireplace: yes
Balcony: possibly

Further wishes/special features:
The basement may later be used as a retirement area (green space) and is at ground level to the east. Ground floor and upper floor should be separable later. A terrace is planned in the southwest.

House design
Who designed the plan: -Do-it-Yourself
What do you especially like? Why?
We would like bright rooms but also paid attention to having enough storage space.
What do you not like? Why?
We need relatively a lot of space on the ground floor, therefore the rooms upstairs are too large.
Price estimate according to architect/planner:
Not yet, depends heavily on the soil report.
Preferred heating technology: pellets, wood or gas (we do not want ventilation system or underfloor heating).

If you have to forego something, which details/extensions
-Can you do without: dressing room
-Can’t you do without: office on the ground floor

Why did the design turn out as it is now? For example
We wanted the kitchen facing east/north to have the driveway in view. The living and dining room to the south with a view of the vineyards, the office to the west because I often sit there in the evening and also a shower on the ground floor for later.

What is the most important/basic question about the floor plan in 130 characters summarized? How can we optimize the floor plan? Have we forgotten anything important? Where could we save m2?

Unfortunately, the images were too large at first... Now it should work.

Should the basement or the ground floor be barrier-free? Where is the entrance? Does the ground floor get direct garden access or only a balcony? Some rooms do not work like that. Your walls are too thin. A bedroom in the south may have a nice view, which is not much use with closed eyes, but it will get very warm. I would rather plan a children's room there.

Thank you for the hints! Both should be accessible: - the basement from the east - the ground floor from the west, partly north, partly south Since the property is on a slope, we would slope it/build a retaining wall with rubble stones so that the front door is level next to the stairs. The windows that you look at from the sofa should also be level, with direct access to the garden. The interior dimensions of the house would be 11x9 m. I need to draw the interior walls thicker. I will move the bedroom for now...

Then google "Nullbarriere." The floor plans do not work barrier-free. I assume you want to plan for this if one of you needs a rollator or even a wheelchair and the care service comes to assist.

Sounds like a lot of filling, digging out, and retaining walls. That costs a lot of money.
Do you need the hobby room, for example? Can earthworks, slope stabilization, etc. be reduced by clever room distribution?
Mentally replace the basement with a lower floor.
Don't plan for too many contingencies. The missing bedroom on the ground floor in case X can be created by partitioning the living room, for example.
Maybe in 50 years, only two of you will live in the house again. An extension should also be possible for you. Boundary offsets will not be your downfall.

Regarding the floor plan:
Ground floor entrance
You come in through the door and immediately there is the staircase. Very cramped. No wardrobe. 4 people need space. Shoes, jackets, stroller, etc.
I would separate the dirt area at the entrance from the stairs. Always walk through the entrance area in slippers or socks?

Storage too narrow. The freezer door cannot open.
Bathroom cannot fit a shower and is not barrier-free.

Upper floor
Bathroom can be nicer. Bathtub in the middle of the room and the frequently used toilet moves to the farthest corner.
Plan the children's room doors so that a wardrobe fits behind them.
What do you think of a utility room on the upper floor? Washing laundry where it originates.

Doors partially too narrow. I estimate 75 or 80 cm.

11x9 m wären die Innenmaße des Hauses.

I would generally add 1.20 m to the edge lengths, then you have roughly the walls represented mathematically.

Die Innenwände muss ich mal dicker einzeichnen.

And add plaster and tolerances, as well as the fact that people do not move with millimeter accuracy. For that, add another decimeter to each room width in total.

Beides soll barrierefrei sein:

That means more than just level. For rollator users, you should provide wider doors, and for wheelchair users additionally "turning circles" ... Represent the slope in numbers, preferably with concrete height specifications within the building plot.