Subsequent construction of carports at a house on a slope

  • Erstellt am 2022-05-21 11:37:37

MrsAndMr

2022-05-21 11:37:37
  • #1
Hello,

we have a house built on a slope in the family. Currently, there is consideration to construct additional parking spaces / carports (e.g. 2-3 parking spaces + bicycle shed) on the property for personal use and for guests. The planned area for this is to be located directly at the property boundary facing the street, so that cars can drive directly from the street onto the parking spaces / carports. Due to the sloping location, a considerable amount of soil (initial rough estimate approx. 240 m³) would need to be excavated and a retaining wall built to counter the earth pressure. I have roughly sketched the idea of the project in the attached pictures (not to scale). According to the soil report from the original house construction, apart from a thin top layer of topsoil, only claystone layers (decomposed/weathered) and sandstone layers are to be expected there (no rock or similar).


Now we are first looking for an initial rough cost estimate, especially regarding the civil engineering work involved (earthworks + retaining wall construction), i.e., what the construction of parking spaces there alone (without carport) would mean. In this context, I am curious if anyone has already done something similar and could share some initial experience values. Experienced users might also be able to share their gut feeling, because I really cannot estimate any scale from-to. Many thanks in advance for any assessment!
 

11ant

2022-05-21 13:08:13
  • #2
As always, I doubt the sense and sustainable feasibility of sheet pile retaining walls.
 

driver55

2022-05-21 13:19:27
  • #3
With an estimated 6 m depth (car length), 4 m height and 10 m length/width I come to 120 m^3. What measurements did you plan/estimate with? But just excavating and hauling away the earth is certainly the smallest item in this project. No idea how many tens of thousands of € it will consume. It is definitely feasible.
 

MrsAndMr

2022-05-21 15:02:43
  • #4

With similar but slightly higher values:

Length into the slope: approx. 8m (space behind the car to walk past on the path side + car length + space in front of the car + space for retaining wall in front)

Height of the slope to be removed: approx. 5m (resulting from the above length and slope inclination)

Width of the parking space: approx. 11m (3 parking spaces + bike shed + 2x space for retaining walls on left and right)

The question is whether we are still at "a few tens of thousands" or already six figures - no idea, so ideally we need a rough estimate preferably based on experience from similar projects.
 

11ant

2022-05-21 15:10:58
  • #5
Check out - she also currently has this topic.
 

i_b_n_a_n

2022-05-21 18:59:08
  • #6
I would first check if you are allowed to build like that. Possibly the proximity to the road prohibits such parking spaces because you can only drive backwards onto the road and thereby endanger the flowing traffic (or park backwards...). This is not allowed on federal roads, a district road would probably be okay (in NRW).

Currently, this was a problem with a construction in the family. They had to create space (house also on a (steep) slope) to be able to park parallel to the road.
 

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