180 sqm non-replacement house, best adaptation to the plot?

So, the corona lockdown and the professional "home stretch" also have their good sides:
I have two small gem plots that are finally supposed to be built on (one for ourselves, one for the eldest son – here is the first one). We negotiated with the plot for a long time, also with an architect (hmm), and I, being slightly indecisive, am losing the clear overview in the face of alternatives: which basic form fits best to the plot and to us?
In a first step, it would be great to get help from you. Then next, the detailed planning from us.

Size of the plot: 500m2, SW location, 19.5 (street) x 25.5; Berlin, very good location.
Very green interior area to the west, not buildable. Quiet street.
2 challenges:
Front garden with 7.5 meters very large,
Huge spruce of 25-30m height almost directly on the western plot boundary at the neighbor in the W/N corner.

Slope: no

Floor area ratio: 0.25

Plot ratio: none, max 2 floors plus roof

Building window, building line and boundary: 7.5m to be kept free towards the street, no parking space there either; 3m to the 3 neighbors

Number of parking spaces

Number of floors: max 2 floors plus roof

Roof shape: Building authority considers flat roofs undesirable, but in the area, such a roof was approved.

Further requirements: "to blend in with the surroundings"

Requirements of the builders:

Style, roof shape, building type: modern, but above all coherent and valuable.

Basement, floors: Basement technically difficult due to access and plot size, all basements in the area, old villas, basement usually about 1 meter above ground, from our point of view inappropriate for such a small plot due to stairs to the small garden,
2 floors plus roof

Number of people, age: 3: F/M/K, 60/51/12, F works from home

Space requirements on ground floor, upper floor: upper floor 3 rooms, a separate study room on ground/upper floor conceivable but not mandatory. Steam sauna.

Office: family use or home office? Home office father

Guest sleeping per year: rarely, child frequently

Open or closed architecture: rather open, but more W and E as a unit than E and K (at the dining table also homework, games, reading newspaper etc.)

Conservative or modern construction: modern

Open kitchen, cooking island: if it fits, but the dining table is essentially the family center, even without food, so a view of frying pans is not necessarily desirable.

Number of dining seats: 5

Fireplace: rather yes, but: it was pointless in the last house, but a dream abroad in France.

Music/stereo wall: F music lover

Balcony, roof terrace: rather yes

Garage, carport: at least carport on the right side (pardon: north)

Utility garden, greenhouse: no

Further wishes/particulars/daily routine, also reasons why this or that should or should not be:

Preferably no "Ritter-Sport house" or "Instead villa". But if conventional is better, also okay.

Preliminary house plans

I am aware that we probably need an architect, and the draftsmen of a construction company will not suffice. However, we have not found one yet (one who can plan biocompatible execution, yes).

Who are the planners from:

One from an architect, but with numerous violations of the development plan promises such as fitness studio in the basement with floor-to-ceiling excavations up to the neighbor's limit.

-Planner from a construction company

-Do-it-yourself

What do you particularly like? Why?

There is a first "draft" of a ground floor and upper floor for each, knowing that the word draft is somewhat exaggerated.

In random order:
Draft 4 (tilted): the adaptation to the sun, the opening of the room from small at the entrance to large in the living room, the transitions, the flow of rooms kitchen-dining-living room, the possibilities of the terrace all around dining/living room, great unconventional children's room with terrace

Draft 3: always works with L-shape of kitchen-dining-living, lots of garden to the west, narrow side towards the southeast neighbor

Draft 2 (angle): the partly covered outdoor area. The tidy upper floor. The upper floor terrace.

Draft 1 ("barn"): the aesthetic exterior. Clear structure.

What do you dislike? Why?

D4: Kitchen too subordinate? Large living room needs subdivision... upstairs attractive-difficult

D3: No structuring of the garden/terrace not arising from/forming with the house/plot

D2: inside on ground floor too fragmented? Kitchen not separated enough from dining table? Upper floor not so easy to design because of angle.

D1 Barn: little garden to the west.

Price estimate according to architect/planner:

Personal price limit for the house, including equipment:

We have no price limit, it should be appropriate to the (small) but valuable plot. I expect "all-in" about 700k euros.

Preferred heating technology: geothermal energy

If you have to waive, on which details/extensions

-you can forgo: basement,

-you cannot forgo: light, ceiling height ground floor 3m, view of nature, absolutely flawless biocompatible execution (minimized pollutants).

What is the most important/basic question about the floor plan summarized in 130 characters?

Which of the basic concepts should we pursue further regarding THIS plot? Or are the options still too many so that we first have to decide what our favorite is?

Regarding teenager: rather smaller ground and upper floor and roof expanded?

Without having read the text: long and narrow on the north side, light through south sun in the house, living room in the west, long staircase with the building. Gable roof.
With text:

E1 barn: little garden to the west.

You have a garden to the west through the garden in the south.

Everything is perfect after all. Modern barn. If you like that, many things are possible :)

PS: Do us and yourself a favor and switch to sketchpad and pencil.

I'm not so sure about that, the floor area ratio including access paths, terrace, and parking space could become very tight. The access path takes up quite a bit of space. Front garden has a large one. Looks impressive visually. 4 and 3 kitchen far from the terrace. 2 doesn't fit the plot at all. I think 1 is good.

Modern barn

1 I like it

2 does not fit the property at all

Many thanks for the quick reply, so: Idea 2 is therefore also out for me, it splits the property into two unrelated parts. Idea 1 (barn) definitely appeals to me, the question is whether it will be "barn-like" enough: the nicest ones I have seen have a length-to-width ratio of 2:1 or more. Here, however, the maximum length is limited to about 13 meters, so max. 1.6 to 1. Is that enough to call it a "barn" or will it then look a bit "chubby"? I have not completely given up on ideas 3 and 4 yet, especially 4 with an oblique angle, which I find appealing because it is not static. Suggestion: I will post the corresponding floor plan ideas for 1, 3 and 4 in the forum, either in paper/pencil form (understood - but currently very hard to buy :p) or at least in a readable program form) Yes, , the floor area ratio is tight, it was originally 0.3 and was then set to 0.25 by the first zoning plan. I think first we need to do without the paved driveway (alone already 20+ sqm), then the carport.... and the terrace, well :cool: .

Proposal: I will post the corresponding floor plan ideas for 1, 3, and 4 in the forum, either in paper/pencil form (understood @ypg - but currently very hard to buy :p) or at least in a readable program format)

If you’re interested in my two cents, then yes, definitely in a readable form. In the depicted Rorschach-Picassos, I don’t just fail to recognize a barn, but also nothing else that I could classify, let alone comment on in detail.

Idea 1 (barn) appeals to me without question, the question is whether it will be “barn-like” enough: the most beautiful ones I have seen have a length-to-width ratio of 2:1 or more. Here, however, the maximum length is limited to about 13 meters, so a max of 1.6 to 1. Is that enough for a “barn” or does it become somewhat “fat”?

For a barn, however, the word is sufficient for a pictorial idea; and if you really mean a barn and not a whole farmyard, then I would not hinge that on the question four-to-three, sixteen-to-nine, or Cinemascope.

Yes, @haydee, the floor area ratio is getting tight, it was originally 0.3 and was then set to 0.25 by the initial development plan. I think first the paved driveway (already 20+ sqm alone) must be waived, then the carport... and the terrace, well :cool:.

Nope, usually the second floor area ratio (the one not mentioned, except in text form in the development plan) applies for access ways and parking spaces. The terrace belongs to floor area ratio 1, so to the possible 125 sqm.

in paper/pencil form (understood @ypg - but currently very hard to buy :p)

You have a child. They surely like to give some away.

the ones I have seen have length-to-width ratios of 2:1 and more.

Barn character is rather shown in the ratio of height, narrow width, roof pitch. You won’t be able to grasp the "length" at close range (property boundaries) at all. Focus first on possible room layouts before fixing length and width... I don’t see the 9 meters at all. The barn, even if you find it too short, is in this case, in my opinion, still the most charming building form.