ᐅ Layout of a Single-Family Home on a Small Trapezoidal Plot

hanghaus2023 schrieb:

Are there no specifications for building heights? Reference points? Benchmark levels?

Yes, there are. But slope-side data is given combined with houses A, B, or C.
And honestly, with all due respect to the detailed work, it’s too much effort for me to summarize all necessary information clearly, including maximum eave heights, and to figure out for someone else—without knowing the floor plan—which fixed dimensions show how the house is optimally positioned.
That is the responsibility of the builder. Also, drawing out the facts.

K a t j a schrieb:

It does make a difference if I place the house centrally

Yes, but are we talking about moving it one meter to the left or right, or just ensuring the living room gets enough light? The floor plan is genuinely the real challenge here—now add the slope data, plus the rule that garages must either be attached to the neighbor's garage or have a one-meter (approximately 3 feet) gap. Then tree planting in front of the plot is mandatory, including linden and oak trees. I couldn't remember exactly which species. But that plays a huge role in planning rooms on the south side that will eventually be enclosed. In addition, fences facing the street or hedges are prohibited.
So, it’s not about placing a fixed-size rectangle well.
You have to plan flexibly _with_ the plot _and_ the floor plan.

K a t j a schrieb:

Allow space for a tree’s canopy.

As I said: on the south side in front of the property.

Zauberwald schrieb:

the most sensible orientation of the house

would be to gather all parameters first—not necessarily for us, but for you. You’d think you’d have already dealt with the plot and the zoning plan rather than just looking through catalog floor plans. That’s not enough if you want—and must—spend half a million.

Zauberwald schrieb:

t). And of course, the orientation also affects a future photovoltaic system. …

Yes, then you already know which direction the ridge must face. That’s a start. Then look at the slope: what can be where? Because raising or lowering ground is not allowed toward the neighbor.

Zauberwald schrieb:

What else must be considered with an 8% slope for house placement?

80cm (approximately 31.5 inches) over ten meters (approximately 33 feet). You really need to check where rainwater flows because it probably has to be collected on your own property.
So: sketch your rooms, where they could be. Sketch a driveway or garage with a one-meter (approximately 3 feet) distance to neighbors and try to get light from the south and quiet from the north. You can spend a month with colored pencils on that. Then you can discuss it, the mistakes, pros, and cons.
This is the answer to the request:

Zauberwald schrieb:

your experience on how to best position a house … on a … plot

Of course, we have been working on the floor plan and development plan ourselves for quite some time. That’s why we are now at the point where we’re unsure about the best way to position the house on the plot because of the “slope.” I’m not concerned about the tree to the south. If it becomes an issue, it simply won’t develop a large canopy; there are plenty of ways to manage that.

As shown in the picture, we have already considered the orientation. At the front, there will be a carport. To the left of it is the storage area. The idea is to be able to enter the house without getting wet by passing through the carport and under the storage’s roof overhang. The floor plan itself is quite simple; I’m attaching it for reference, but my main interest is in the “big picture” regarding the orientation.

It would help to answer all questions. With your house, the minimum 1.3/1 ratio is not met based on your specifications. So, 11 x 8.4 m (36 x 28 ft) could work.

hanghaus2023 schrieb:

It would help to answer all questions. With your house, the minimum ratio of 1.3/1 is not met based on your information. So 11×8.4 m (36×28 feet) could work.

Yes, you’re absolutely right that we are just under 1.3. Respect for spotting that so quickly!
But that’s exactly what I mean: it’s not about checking the floor plan of the house to the millimeter right now; what matters to us first is how the house is positioned, and then we can deal with the exact details inside the house. That seems like the simplest way to first establish a basic orientation and then think about the “smaller details,” right? Our main goal inside the house is to create as much space as possible in the living/dining area and to have two reasonably equal-sized children’s rooms.

Zauberwald schrieb:

there are plenty of ways to manipulate it.

The development plan states that you are there for the care. Well, that’s a promising start, considering they are already thinking about assisted dying for important trees.

I rotated the house to align with the contour lines. The result is an optimal photovoltaic yield and a large garden facing south.

I calculated the slope using the Bayernatlas.

2.5 m (8.2 ft) / 31.71 m (104 ft) = 0.0788, so my initial estimate was quite accurate.