ᐅ Challenge of a quarter-circle house ;)

Hello everyone,

Warning: "repost" after optimization. Reloaded.
https://www.hausbau-forum.de/threads/Herausforderung-Grundriss-für-unschoene-grundstueckform-Hilfe.32565/
What has happened so far:

I am currently planning a house on a somewhat challenging plot shape. (Of course, the question immediately arises, "why don’t you buy a plot with a better shape to work with?" Answer: in our region of BW Region X, there are hardly any affordable plots. The city’s land prices are around 480 €/m2 (about $45 per sq ft).) The plot is located slightly outside the city and was purchased relatively cheaply.

Okay, so I now have the plot, and “only” the house is missing on it.

In advance: the building authority gives me no exemptions whatsoever.

A major challenge is the house geometry because I prefer having the terrace on the south/west side and still enough space inside the house.

In the first attempt, I planned several corners. House geometry as ground floor:

Based on your contributions and ideas, I completely rounded it into a quarter circle, which I also like better and can get used to.
Yes, the topic of walls, windows, and furniture is a bit more complex, but it has its charm.

Currently, I have considered the following layout.

Here are the basic key data:

Development plan / restrictions
Plot size: 434 m2 (4670 sq ft)
Slope: no (or minimal)
Floor area ratio (FAR): 0.4
Building coverage ratio (BCR): 0.4
Building envelope: see development plan above (2.5 m (8 ft) to neighbors)
Edge development: no
Number of parking spaces: garage + 2 parking spots
Number of floors: 2 full floors (basement + ground floor + first floor)
Roof type: pitched shed roof
Architectural style: semi-detached house
Orientation: see development plan above, right side
Maximum heights/limits: ridge height 8.5 m (28 ft), eaves height 5.5 m (18 ft)
Additional regulations:

Client requirements
Style: modern
Building type: semi-detached house, 2 stories each approx. 120 m2 (1300 sq ft)
Basement, floors: 0, 1.5
Number of occupants, age: 2 adults, currently no children
Space requirement per floor: approx. 120 m² (1300 sq ft)
Office: family use or home office? Office in living room or children’s room
Overnight guests per year: 15
Open or closed architecture: mixed
Conservative or modern construction: modern
Open kitchen, kitchen island: open kitchen with dining and living area with access to terrace
Fireplace: optional
Music / stereo wall: TV on wall
Balcony, roof terrace: no
Garage, carport: garage yes
Kitchen garden, greenhouse: no
Other wishes / special features / daily routine, also reasons why or why not

House design
Designed by: myself
I like the larger terrace in the south/west directly from the living-dining area
Both bedrooms have their own bathroom
Bathrooms all aligned for plumbing

Cost estimate according to architect/planner:
Personal price limit for house, including equipment: 550,000 euros (without furniture or land)
Preferred heating technology: gas burner

If you had to give up, which details/upgrades
- Could you give up: not sure
- Can you not give up:

Why is the design the way it is now? For example:
I wanted, as described above, a large combined kitchen, dining, and living area with direct access to the main terrace.
For that, keep the house maximum to the north side. Two bedrooms, each with its own bathroom.

Here are my questions and requests for advice:

What is the most important / fundamental question about the floor plan in 130 characters?
1. Do you prefer the rounded design over the corners from the first draft?
Before:

Now:

2. What do you think of my new floor plan?
Architect criticizes:
--Bathroom without windows (No-go?)
--Small entrance area, staircase without a landing is bad, basement stairs are bad
--Bedroom 2 should be in the east (if child)

3. How would you optimize the weaknesses from point 2?

4. How do you find the architect’s initial draft?

Thank you very much in advance and best regards

Serdar88 schrieb:

Plot size: 434 m2 (4,672 sq ft)
Slope: no (or minimal)
Site coverage ratio: 0.4
Floor area ratio: 0.4

Serdar88 schrieb:

Building type: semi-detached house, 2 floors of about 120 m2 (1,292 sq ft) each
Basement, floors: 0, 1.5

Is all of that still feasible?

kbt09 schrieb:

Is all of that still going to fit?

Two-family house, meaning 120m² (1290 sq ft) on the ground floor plus 120m² (1290 sq ft) on the upper floor

Thanks

Floor area ratio 0.4 * 434m2 (4672ft2) = 174m2 (1873ft2). This is your maximum allowable floor area.

The total area of the full floors of a building equals the floor area. The area of the full floors is calculated based on the external dimensions of the building.

In the last plan, you roughly estimated the volume as 17 x 10 m (56 x 33 ft) (minus rounding plus the overhang above the bedroom)...

This means that with one full floor on the ground level, your floor area ratio is practically fully utilized! Above the "bungalow," only a roof or a half-story would be permitted; in any case, no additional full floor.

The architect surely knows the floor area ratio? How should it proceed in the upper floor?

I agree with Scout on this. Maybe @Escroda will chime in as well.

The question is also why these two residential units in particular?

PS: In your first thread, you mentioned a basement and here a shell construction as the building site. And: "Price estimate according to architect/planner: 330,000 euros including exterior work and kitchen"

Let’s say 60,000 euros for exterior work and additional construction costs, plus a cheap kitchen from a discount store. That leaves 270,000 euros for your 120 m² (1,292 sq ft) on the ground floor. That could be enough.

But for a basement and even a full additional floor with another 120 m² (1,292 sq ft) on the upper floor? Impossible!