ᐅ Challenge of a quarter-circle house ;)

Created on: 5 Nov 2019 02:16
S
Serdar88
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.

Site plan with yellow and pink zones, blue outline, north arrow, max single-family home 209.50 m

Site plan showing a plot with lawn and curved driveway

Plot site plan with curves, measurement lines and boundary markers.

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:

Site plan of a plot showing boundary, driveway and lawn area


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.

Site plan: blue building footprint on plot with measurement lines in meters and curved boundary.

3D view of a pink, semicircular pool basin model in SketchUp.


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:

Detailed 3D floor plan of a house with furniture, stairs and rooms

Now:

2D floor plan of a house with living room, kitchen and stairs, including measurements.


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?

Floor plan of a building with red exterior walls; kitchen, dining area, living room, bathroom, stairwell.


Thank you very much in advance and best regards

2D floor plan of a single-family house with color-coded areas
kaho6745 Nov 2019 14:58
ypg schrieb:

However, I don’t understand why the house is pushed against the western boundary instead of orienting a slightly narrower, rectangular house on the eastern side.

The house would only be 5–6 meters deep (16–20 feet). As soon as you move it back to gain more depth, you have to move it back significantly because the curve is so unfavorably shaped. This would, in turn, narrow the terrace and garden, which the original poster does not want. In the end, you almost end up with the first image from post #1. The 3 meters (10 feet) to the east have to be accounted for, and 434 square meters (4,670 square feet) is still just 434 square meters.
Y
ypg
5 Nov 2019 15:15
kaho674 schrieb:

The house would only be 5-6m (16-20 feet) deep. As soon as you move it back to create more depth, you have to move it back a lot because the curve is so extremely unfavorable. That would, in turn, narrow the terrace and garden, which the original poster does not want. In the end, you’d almost end up with the first picture from #1. The 3m (10 feet) to the east still need to be added, and 434m² (4,667 ft²) is just 434m² (4,667 ft²).

By rectangular, I mean without a curve: right angles. The L-shape, like you drew it. Or something similar.
Anyway...
Off-topic.
It seems to be becoming a trend here to start new threads repeatedly about the same house, with the same discussions over and over. Every time things get difficult for the builder...
@micric3 was/is one of those as well. The plot keeps getting rotated anew, but the plans always start from the same point, instead of moving away from the bottleneck.
M
Mottenhausen
5 Nov 2019 15:37
Overall, the steps are once again being taken in the wrong order. A house is being designed before the requirements have even been determined.

A senior living area on the upper floor (without an elevator—a contradiction in terms) is set as the planning basis without properly considering the purpose, need, advantages, disadvantages, etc.

Then a chain reaction starts: a large building mass is needed to meet all the wishes -> it becomes too large for the plot -> the house is pushed to the unfavorable/curved building boundary -> half of the rooms have to make do with poor compromises -> construction costs skyrocket -> and so on, and so forth. ALL FOR NOTHING.
kaho6745 Nov 2019 16:20
Yes, I’m really surprised that someone has already purchased a plot of land but still doesn’t know what kind of rooms they actually need or apparently has no clear ideas yet. Did they just buy the land casually because it was available at the moment? Like we used to grab bananas just because they were there?

You should at least know whether you want no children or three. Whether that actually works out is something no one can predict, but for me, that’s part of planning a house. Whether the parents will need a room in the house in 20 years, on the other hand, doesn’t seem so crucial to me in life planning. Of course, there are always exceptions and special cases.
E
Escroda
5 Nov 2019 16:40
Serdar88 schrieb:

So, my surveying office said no, but I think yes.

Rule number 1: The surveyor is always right!
Since no other regulations are specified in the development plan and it is based on the 2013 version of the Federal Land Use Ordinance, Section 19, paragraph 4, sentence 2 applies:
The permitted footprint may be exceeded by the footprint of the facilities mentioned in sentence 1 by up to 50 percent, ...
Scout schrieb:

Terraces

... are not mentioned in sentence 1 and therefore fully count towards this.
Serdar88 schrieb:

Basement, floors: 0, 1.5
Serdar88 schrieb:

Two-family house, that is 120m2 (1,292 sq ft) ground floor + 120m2 (1,292 sq ft) upper floor

So what is it now? Two full floors or 1.5 (even though half floors don’t officially exist)? Show the upper floor. Show an elevation (or all four).
Y
ypg
5 Nov 2019 16:50
I would also like to see the floor plan... that would be enough for me.
I'm curious about the roof. I do have some ideas, but it would be interesting to see how @Serdar88 plans to do it.

I also have my doubts about this "when the elderly get old" argument.
The layout is not important at all at this stage!