ᐅ Curved plot, single-family house 50 m², slope site, garage optimization

Created on: 10 Feb 2020 20:38
T
Tobbster77
Hello dear forum members,
as future homeowners, we kindly ask for your support in planning our house.

Development Plan / Restrictions
Plot size -> 597 m² (6425 ft²)
Slope -> yes (approximate gradient: 3.7 meters (12 ft) at the long end / 2.9 meters (9.5 ft) at the short end) according to attachment
(after 8 meters (26 ft) – possible house start – approx. 80 cm (31 inches) / after 17 meters (56 ft) approx. 1.8 meters (5.9 ft))
Site coverage ratio -> see attachment
Floor area ratio -> see attachment
Building window, building line and boundary -> see attachment
Edge development -> see attachment
Number of parking spaces -> 2
Parking space/garage -> can be planned outside the building window
Number of storeys -> 1.5
Roof type -> gable roof
Style -> classic
Roof pitch 38 to 52 degrees
Orientation -> garden facing south / west
Maximum height / limits -> 8 meters (26 ft) ridge height
Knee wall height -> 1 meter (3.3 ft)

Homeowners’ Requirements
Style, roof type, building type -> single-family house in timber frame construction with a gable roof (40 degrees) and bay window / corner bay or projecting corner bay with flat roof
Basement, floors -> yes (utility basement / habitable basement still undecided. We hope for input)
Number of residents, age -> 3 to 4 people – young family
Space requirements on ground floor and upper floor -> house with approx. 150/160 m² (1615 / 1720 ft²) usable floor area (approx. 80 m² (860 ft²) living space on ground floor / 50–60 m² (540–650 ft²) living space on upper floor depending on knee wall height)
Office: family use or home office? -> rarely or never used as home office / possibly later converted into a bedroom
Guest stays per year -> few, so no classic guest room planned
Open or closed architecture -> open architecture
Conservative or modern construction -> conservative with one or two style elements (bay window / corner bay / conservatory) desired
Open kitchen, kitchen island -> open kitchen
Number of dining seats -> 4-6
Fireplace -> no
Music / stereo wall -> undecided
Balcony, roof terrace -> rather no
Garage, carport -> garage and carport (challenge here: we don’t know how best to position these so the house can be placed as far forward as possible to maximize garden area).
Utility garden, greenhouse -> utility garden
Other wishes / special features / daily routine, including reasons why certain things should or should not be included
House type: KfW 40 Plus

House design
Who prepared the plan:
- Planner of a construction company -> building company
- Architect -> we now want to commission one separately because we are not making progress
- Do-it-yourself -> the floor plan basically already reflects our wishes and ideas and was created based on our input

Estimated price according to architect/planner: approx. 420,000 €
Personal price limit for the house, including equipment: 460,000 €
Preferred heating technology: air-to-water heat pump

If you had to give up something, which details/extensions could you do without?
- can do without: double garage / combined parking space
- cannot do without: everything else

Why did the design end up like it is now? For example:

As is often the case, homeowners usually start from scratch. We initially visited prefabricated house parks and then looked into offers from various providers. Since there was basic agreement with some house types, we requested quotes. The floor plan itself was developed based on model house visits and our ideas and wishes. We can basically imagine living like this. But of course, there are other opinions and room for optimization. Since the planning, to quote common expressions, has been done or would be done by “draftsmen,” and we simply have not yet received an ideal answer to our questions, we are now looking for your advice.

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

How can we position the garage and carport so that the house, approximately 10 meters (33 ft) wide and with the desired floor plan, can be placed as far forward toward the street as possible? Our goal is to maximize the garden space at the back. Or are we stuck on the garage, or should the house look different to allow moving it forward?
We have already asked the municipality whether it is possible to rotate the garage and place the driveway differently (see attachment). According to their preliminary check, there are currently no objections. However, I am somewhat skeptical (keyword: turning radius). It is a cul-de-sac with a 30 km/h (20 mph) speed limit.
Furthermore, we are still considering whether it makes sense, given the sloping site, to build a habitable basement or invest capital in it. Renting it out is not planned, but it may be used for the children later or as a recreational basement.

We would be very grateful for suggestions and tips.

Plot plan with streets, paths, green areas and building boundaries of a construction project


Site plan with property boundaries, red circle marking building plot and measuring line


Site plan: orange roadway, blue boundary lines, red driveway arrows.


Floor plan of a house: living/dining, kitchen, hall, guest room, shower/WC, storage room


Floor plan diagram of an attic floor: bedroom, dressing room, children’s room, bathroom, hall


Basement floor plan with rooms: multifunctional, utility room, storage, hall and staircase (dimensions).
11ant13 Apr 2020 01:54
Tobbster77 schrieb:

It’s certain that we’ll build with a basement. Isn’t the debate about basements rather subjective? Some say you need one (because they have one), others say you don’t (because they don’t),

And my point is: a basement doesn’t make financial sense as a simple yes or no, but depends on the height difference within the building footprint. In other words, to put it on an objective level: if you build it without needing it, it costs unnecessarily to construct; if you don’t build it when you actually need it, you end up paying as much for substitute measures as you would have for the basement itself. My simple formula is that for every 20cm (8 inches) of height difference, you pay 10% of the basement cost—this applies both to the built basement (with the benefit of additional storage space) and to the substituted non-built basement through terrain shaping and reinforcement. In your case (100cm (39 inches) height difference = 50% of basement costs), I see the factual “truth” exactly halfway between “basement yes” and “basement no,” so your personal preference should be the deciding factor. For a height difference of 60cm (24 inches), I would objectively lean clearly towards “no,” and for 140cm (55 inches), clearly towards “yes,” each even in the face of opposite subjective opinions.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
kaho67413 Apr 2020 10:05
How many parking spaces do you need to provide, and how many do you actually require? Does it have to be a garage, or would a carport also be acceptable?

The contour lines are really hard to read, many details are missing, quite vague, or simply not included in the budget. This significantly weakens the feedback in the forum. Additionally, you have a rather challenging plot of land. Generally, the more complex the site, the more you need an experienced architect. I wouldn’t rely on the draftsman of a general contractor here.

If it were my project, I would agree with Yvonne @ypg and build a basement level. Find a professional who really knows their stuff.
Tobbster7713 Apr 2020 10:44
kaho674 schrieb:

How many parking spaces do you have to provide, and how many do you actually need? Does it have to be a garage, or would a carport also be acceptable?

The contour lines are really hard to read, many details are missing, very vague, or not within the budget at all. This significantly weakens the feedback in the forum. Also, you have a rather challenging plot. Generally, the more complex the plot, the more you need an experienced architect. I wouldn’t rely on the draftsman of a general contractor here.

If it were mine, I would join Yvonne @ypg and build a basement level. Find a professional who knows what they’re doing.

I based my answers on the questionnaire. Sorry for the missing information. I tried to add the details with the pictures and sketches. Two parking spaces must be provided. Either a garage or a carport is possible.

Assuming you build with a basement and part of the basement space is used for technical equipment and a utility room, wouldn’t that reduce living space compared to 1.5 levels above ground?
The ground floor is actually planned to be used as a bedroom later on, in case stairs become difficult. That’s why it’s planned this way.
I imagine it would be tricky or inconvenient to have the main entrance on the ground floor and then, for example, always have to go down to the basement after grocery shopping.

We will of course hand this over to professionals again.

@ypg The hallway doesn’t seem to be well received. How do you think it could be improved?
11ant13 Apr 2020 13:30
kaho674 schrieb:

The contour lines are really hard to make out,

The house symbol on the site plan ranges in elevation from about 290.5 meters (953 feet) on the valley side (left side of the plan) up to about 291.5 meters (957 feet) on the uphill side (street on the right side of the plan).
kaho674 schrieb:

Also, you have quite a challenging plot of land.

It’s manageable. If the tree on the (rounded) corner is a protected tree according to the plan, I would request its relocation. Otherwise, it’s a moderate sloped corner plot at a bend in the road, close to a cul-de-sac that has presumably existed for about two to three decades, until the development area is extended into the adjacent field. So later on, the plot will likely be at the entrance to the street—shifted similarly to @Guido1980—and for some time the garbage truck will turn around there first.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
K
kbt09
13 Apr 2020 13:46
kaho674 schrieb:

The contour lines are really hard to make out, many details were missing, very vague, or not included at all given the budget. This greatly weakens the response in the forum.

It would always be helpful to have a site plan clearly labeled with the lengths of the sides and so on, instead of hiding this information somewhere in long blocks of text in the thread, where terms like dead-end streets are mentioned. A clear, north-oriented drawing with dimensions and contour lines can convey everything. Ideally, floor plans should at least include a north arrow.
kaho67413 Apr 2020 14:06
11ant schrieb:

Otherwise, it is a moderately sloped corner plot at a bend in the road, near a turning area that has probably been in use for about two to three decades,
The main difficulty, in my opinion, comes from the limited width along the street. In addition, the moderate slope is somewhat problematic, being neither flat nor steep. The allocation of parking spaces should be settled first before discussing floor plans.