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 11:34
Scout schrieb:

It depends on the local development plan. The floor area ratio can often be exceeded by up to 50% with ancillary structures like terraces.
Yes, the original poster could find out if that applies. That would be crucial in this case.
S
Scout
5 Nov 2019 11:36
Serdar88 schrieb:

Is the garage fully included in the floor area ratio? My surveying office said no, but I think it is.
-> Upload the zoning plan / development plan!
H
haydee
5 Nov 2019 11:39
How are elderly grandparents who are frail supposed to access the upper floor and maintain a 120 sqm (1,292 sq ft) household in good order?

Anyone who can manage that could also continue living in their old house.
S
Scout
5 Nov 2019 11:41
Serdar88 schrieb:

Yes, the idea is that when the parents become weaker, they can move in with us, so we essentially have two separate units.

Firstly, things often turn out differently than expected. Having 120 m2 (1300 sq ft) or reserving a quarter of a million just in case is something you need to be able to afford first... How about making the project a bit smaller in volume: a small two-room apartment for the parents plus your open living area downstairs and your bedrooms upstairs in the converted attic. You could easily save 50,000 to 100,000 euros there. And the parents wouldn’t have to climb stairs. And nobody would be walking over your bedrooms ;o)
kaho6745 Nov 2019 12:00
Scout schrieb:

Firstly, things often turn out differently than expected. Having 120 m2 (1300 sq ft) or setting aside a quarter of a million just in case is something you have to be able to afford first... How about making the project a bit smaller in volume: a small two-room apartment for the parents plus your open-plan living area downstairs and your bedrooms upstairs in the converted attic. That should easily save between 50,000 and 100,000. And the parents wouldn’t have to climb stairs. And no one would be walking over your beds ;o)

In my opinion, that still contradicts itself. What’s the point of a two-room apartment for the parents if they’re not even moving in yet? In the end, they’ll never want to leave their own house. Then you’ve just wasted money and space completely unnecessarily.
H
hampshire
5 Nov 2019 12:01
Extraordinary ideas on a tight budget – I’ve reached the limit as a layperson here. Neither of the two designs has the spark I would expect, and at the moment I don’t have a better idea myself.

What bothers me most is that the garage occupies a prominent south-facing spot. I also find it completely incomprehensible that the architect has placed a toilet and a storage room on part of the south side.

Regarding the budget again: if the 120 m² (1,292 ft²) section for the grandparents costs around €250,000 and is not accessible for disabled persons, then this could be a potential poor investment. A disability-accessible apartment could be rented for about 20 years instead of this investment. It would also be possible to buy an age-appropriate rental apartment nearby, finance it through rent, and if needed, use it for the parents as personal use accommodation. Building one’s own home can then be both more practical for life and more cost-effective.

Of course, I fully respect any lifestyle choice, and if the parents are to live in the house, then that must be realized regardless of what forum members think.

From experience with “frail” parents, I made sure during construction that we would not have to be moved into our children’s home eventually. How things actually turn out, you never know. Frailty can also be cognitive – consider dementia and its specific form, Alzheimer’s disease.