Hello,
our family owns a house on a hillside. We are currently considering adding extra parking spaces / carports (e.g., 2-3 parking spots plus a bike shed) on the property for personal use and guests. The planned area would be located directly along the property line facing the street, allowing direct access from the street to the parking spaces / carports. Due to the hillside location, a significant amount of soil would need to be excavated (initial rough estimate about 240 m³ (310 cubic yards)) and a retaining wall would have to be built to resist earth pressure. I roughly sketched the idea in the attached images (not to scale). According to the soil report from the original house construction, aside from a thin top layer of topsoil, only layers of claystone (decomposed/weathered) and sandstone should be expected (no rock or similar).
We are first looking for a rough cost estimate, especially concerning the earthworks and retaining wall construction—that is, the cost of creating the parking spaces alone (without carports). In this context, I am curious if anyone has done something similar and could share some initial experiences. Experienced users might also share their gut feeling, as I really have no sense of the potential size of the project. Many thanks in advance for any input!
our family owns a house on a hillside. We are currently considering adding extra parking spaces / carports (e.g., 2-3 parking spots plus a bike shed) on the property for personal use and guests. The planned area would be located directly along the property line facing the street, allowing direct access from the street to the parking spaces / carports. Due to the hillside location, a significant amount of soil would need to be excavated (initial rough estimate about 240 m³ (310 cubic yards)) and a retaining wall would have to be built to resist earth pressure. I roughly sketched the idea in the attached images (not to scale). According to the soil report from the original house construction, aside from a thin top layer of topsoil, only layers of claystone (decomposed/weathered) and sandstone should be expected (no rock or similar).
We are first looking for a rough cost estimate, especially concerning the earthworks and retaining wall construction—that is, the cost of creating the parking spaces alone (without carports). In this context, I am curious if anyone has done something similar and could share some initial experiences. Experienced users might also share their gut feeling, as I really have no sense of the potential size of the project. Many thanks in advance for any input!
As always, I have doubts about the practicality and long-term feasibility of sheet pile retaining walls.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
MrsAndMr schrieb:
initial rough estimate about 240 m³ (cubic meters)With an estimated depth of 6 m (20 feet) (car length), 4 m (13 feet) height, and 10 m (33 feet) length/width, I calculate 120 m³ (cubic meters). What measurements did you use for your planning/estimation?
But just excavating and hauling away the soil will certainly be the smallest cost item in this project.
No idea how many tens of thousands of euros [€] this will consume.
In any case, it’s definitely doable.
driver55 schrieb:
At an estimated depth of 6m (20 feet) (car length), 4m (13 feet) height, and 10m (33 feet) length/width, I come to 120 m³ (4,240 ft³).
What dimensions did you plan/estimate?
But just excavating and removing the soil is probably the smallest cost item for this project.
No idea how many tens of thousands of euros it will consume.
It’s definitely doable. With similar but slightly higher values:
Length into the slope: approx. 8m (26 feet) (space behind the car to walk past on the pathway side + car length + space in front of the car + space for retaining wall at the front)
Height of the slope to be excavated: approx. 5m (16 feet) (based on the length above and slope gradient)
Width of the parking area: approx. 11m (36 feet) (3 parking spaces + bike shed + space for retaining walls on both left and right)
The question is whether this will still be in the range of “a few tens of thousands” or rather already six figures—I have no idea. Therefore, we ideally need a rough estimate based on experience with similar projects.
MrsAndMr schrieb:
The question is whether we are still talking about "a few tens of thousands" or rather already six figures – no idea, so ideally we need a rough estimate, preferably based on experience from similar projects. Check with @Yaso2.0 https://www.hausbau-forum.de/threads/hoeherliegende-nachbargrundstuecke-abfangen-l-steine-usw-tipps.38286/page-17#post-575975 – she is currently dealing with this topic as well.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
I would first check whether you are allowed to build like this. The proximity to the road might prohibit such parking spaces because you can only reverse onto the road, which could endanger flowing traffic (or reverse parking...). This is not allowed on federal highways, but probably okay on district roads (in NRW).
Currently, this was an issue with a family construction project. They had to create space (the house is also on a (steep) slope) to be able to park parallel to the road.
Currently, this was an issue with a family construction project. They had to create space (the house is also on a (steep) slope) to be able to park parallel to the road.
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