Floor plan single-family house, 230 sqm living area, east slope, Bauhaus style

Development plan/restrictions
Plot size: 610 sqm, rectangular (approximately 15 x 40 m)
Slope: east-facing slope, approximately 28% gradient. Road downhill. House should be positioned in the upper third on the uphill side (privacy and view).
Plot ratio: n/a (no development plan)
Floor area ratio: n/a
Building window, building line, and boundary: n/a
Edge development: presumably 2.50 meters in all directions
Number of parking spaces: n/a
Number of floors: n/a
Roof shape: n/a
Style: n/a
Orientation: n/a
Maximum heights/limits: n/a
Further requirements: There is no development plan. However, various house types can be found on the street, so architecturally almost anything should be possible.

Client requirements
Style, roof shape, building type: Bauhaus style, preferred flat roof (possibly also shed roof)
Basement, floors: Basement integrated into the slope as a living basement, two floors above
Number of people, age: So far 3 people, 33 and 32 years old, and an infant
Space requirements on ground floor, upper floor: Ground floor: kitchen, pantry with sink niche, living room, study, WC, entrance area with dressing room
Upper floor: master bedroom with dressing room, two children’s rooms, bathroom, roof terrace
Basement floor: guest room, guest bathroom, study, utility room, technical room, storage room, fitness room
Office: family use or home office? Currently family use, home office prospective
Overnight guests per year: Parents-in-law would visit frequently
Open or closed architecture: open
Conservative or modern construction: modern
Open kitchen, cooking island: open kitchen with cooking island
Number of dining seats: one large dining table
Fireplace: preferred, as in the floor plan
Music/stereo wall: possibly in the living room
Balcony, roof terrace: roof terrace facing the valley (east side)
Garage, carport: double garage separate from the house, digged into the slope by the road
Utility garden, greenhouse: no
Further wishes/special features/daily routine, also reasons why certain things should or should not be included: no ventilation system, no smart home, photovoltaic system

House design
Who designed it: Do-it-yourself.
Living area: approximately 230 sqm (half counted with roof terrace)
Usable area: approximately 260 sqm
What do you particularly like? Why? The cantilevers to the east and south, the glass fronts, the integration into the slope, straight staircase, long sightline on the ground floor
What do you not like? Why? Possibly entrance area, as too small? Living room too small?
Price estimate according to architect/planner: none yet
Personal price limit for the house, including equipment: n/a
Preferred heating technology: air-to-water heat pump, underfloor heating

If you have to do without, which details/extensions
- can you do without: cantilevers if much more expensive, flat roof if much more expensive
- cannot do without: glass fronts

Why is the design as it is now?
The floor plans are a first draft, entirely developed independently and intended as an initial basis for discussion. For the creation, I oriented myself on three main pillars: slope orientation, cardinal directions, and the shape of the plot. Due to the east slope, it was set for me that the larger, floor-to-ceiling glass fronts and the living and dining rooms on the ground floor as well as the guest room in the basement should be positioned facing east (beautiful view to the valley). To have the option of going outside from the kitchen and enjoying the sun, the kitchen on the ground floor is planned adjacent on the south side, again with larger glass fronts. Another thought in planning was that, immediately upon entering the house, a long sightline to the valley should be achieved. For this reason, the entrance was positioned on the uphill side. Functional rooms (bathroom, technical, dressing room, pantry, etc.) are generally oriented toward the uphill side (west). Furthermore, all WCs are arranged vertically to simplify piping. The two cantilevers of one meter each are meant to provide some shade but are primarily aesthetic and can be omitted if necessary. Originally it was a pure cube of 10 x 10, but this variant is much more appealing to my wife and me. The glass fronts are not finally dimensioned and serve only as a guide. If this is not statically possible, they can be somewhat smaller. The straight staircase is surely a point for discussion, although I find straight staircases visually very appealing.
Regarding privacy and neighbors: Not relevant on the valley side due to slope location. On the uphill side, there would be an adjacent house, so no open fronts there. On the sides (north and south), houses are located farther towards the street and additionally high trees and shrubs in between. Thus, almost complete privacy.
Please ignore the outdoor areas not belonging to the terraces in the floor plans, as they were only used for the approximate simulation of the slope.

What is the most important/fundamental question about the floor plan summarized in 130 characters?
Is our design heading in the right direction, or are there major flaws that have not been considered?

The plan is intended, among other things, to obtain initial comparisons from various companies about what a comparable house would currently cost. We understand that an architect must be involved in further planning for such a project.

We are very grateful for any response!

Personal price limit for the house, incl. equipment: n. a.

That is good, the project will roughly stay within this price range :D

That's good, the project will roughly stay within that price range :D

We have not yet determined the absolute limit, but we are quite well positioned. The plot of land is already purchased and we also have a good amount of equity plus a high and steadily increasing income. However, if the project is financially excessive as presented here, we are naturally grateful for this information and the reasons. We are both laypersons and that is exactly why we are posting our idea here.

The glass facade is expensive, the size as well.

Inside, the floor plan is terrible. The proportions of the rooms do not match each other, the kitchen is unusable as such, the guest has to go through a mini fitness room to get to the toilet and has to close two doors at night, there are unnecessary bottlenecks such as in the bedroom to the dressing room (which is poorly located).

The house would become very expensive, throw away the design and find an architect and commission them for all service phases.

Now let's get to the point: What is your budget? You can’t just build this for 700k.

The glass facade is expensive, the size as well.

Inside, the floor plan is awful. The proportions of the rooms do not match each other, the kitchen is unusable as such, the guest has to go through a mini gym to get to the toilet and has to close two doors at night, there are unnecessary bottlenecks such as in the bedroom leading to the dressing room (which is unfavorably located).

The house would become very expensive, throw away the design and find an architect and commission him for all service phases.

Now let's get to the point: What is your budget? You can’t just build this for 700k.

Okay. Then that’s how it is. Thank you very much for the honest answer! I had already expected that.

We have not yet determined the absolute limit, but we are quite well positioned. The property is already purchased and there is still a good amount of equity capital + a high and steadily increasing income available. However, if the project as presented here is financially excessive, we are of course grateful for this information and the reasons. We are both laymen and that is exactly why we are posting our idea here.

With a hillside location and these requirements, you’re probably looking at at least €3,500 / sqm * 230 sqm = €805,000. Then there are additional construction incidental costs and upgrades. You will probably reach around €1 million.

Budget is already very important, because if you come with €500,000, there’s no point in making any further efforts here..