ᐅ Single-family home construction project on a sloped site – options for slope stabilization
Created on: 4 Dec 2020 21:33
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blockschrift7
Hello dear house building forum,
we have purchased a plot of land in Bavaria. The plot is 590 sqm (6351 sq ft) and is located on a slope.
Now we face the big challenge of how to support the slope.
We have the following height difference:
Top left is basically the zero point.
West---------North------------East
(0.00) --------- (0.20) ------------ (-1.40)
(-1.80)------------------------------(-2.90)
-------------Street side -----------
Our structural engineer said that we need an L-shaped retaining wall of about 0.80 meters (2.6 feet) at the back and about 2 meters (6.6 feet) at the front. He estimates costs of around €60,000 coming our way.
Do you have any ideas on how to make this more cost-effective?
Thank you in advance.
we have purchased a plot of land in Bavaria. The plot is 590 sqm (6351 sq ft) and is located on a slope.
Now we face the big challenge of how to support the slope.
We have the following height difference:
Top left is basically the zero point.
West---------North------------East
(0.00) --------- (0.20) ------------ (-1.40)
(-1.80)------------------------------(-2.90)
-------------Street side -----------
Our structural engineer said that we need an L-shaped retaining wall of about 0.80 meters (2.6 feet) at the back and about 2 meters (6.6 feet) at the front. He estimates costs of around €60,000 coming our way.
Do you have any ideas on how to make this more cost-effective?
Thank you in advance.
B
blockschrift78 Dec 2020 10:16Great, thank you very much for the answers and support.
Yesterday, I decided that we will commission a retaining wall in the north during construction and leave the retaining wall in the south as is for now, ordering it later.
Yesterday, I decided that we will commission a retaining wall in the north during construction and leave the retaining wall in the south as is for now, ordering it later.
M
Matthew038 Dec 2020 12:3311ant schrieb:
From the pictures, it’s quite clear regarding §34: flat roof – noEven though @Escroda – for whatever reason, unfortunately went unnoticed by me (just like the situation with @katja (whom I had asked elsewhere without a reply) and it’s really a shame – no longer supports us here with advice and assistance, you, who is said to have a Sheldon Cooper-like eidetic memory, should still have his repeated words on this §34 issue ringing in your ears: the roof shape has no relevance for fitting in with the surrounding buildings! 😉
blockschrift7 schrieb:
Yesterday, I voted that we will order a retaining wall on the north side during construction, and keep the retaining wall on the south side as is for now and then arrange for it to be built later. If it is absolutely unacceptable for you to level the terrain differently than shown in the drawing in the initial post, then the proposed retaining walls will be neither negotiable in terms of their necessity nor the timing of their installation, but strongly recommended. However, considering the already quite substantial costs estimated for this, in my opinion, you should be more open to alternatives. Raising a house because you assumed a slope stabilization would be retrofitted later would be even more expensive.
Matthew03 schrieb:
The roof shape is irrelevant for fitting into the surrounding buildings! But the pitch, and indirectly the shape, does matter: with gable roofs of, for example, 35 degrees in the neighborhood, a 30 or 40 degree hip roof, half-hip roof, or even a shed roof is feasible, but a flat roof—i.e., a shed roof with about 2 degrees pitch—is not.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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Matthew038 Dec 2020 17:0111ant schrieb:
But the roof pitch, and therefore the shape indirectly: with gable roofs of, for example, 35 degrees in the neighborhood, a 30 or 40 degree hip roof, half-hip roof, or even a shed roof is possible—but not a flat roof, also known as a 2 degree shed roof.I have to disagree here once again, on behalf of @Escroda 😉
Escroda schrieb:
In a §34-type area according to the building code, there is no requirement to match roof pitches or shapes.And as a general addition:
Escroda, member: 27820 schrieb:
The scope of the matching requirement is clearly defined in the law:
- Type of land use (residential area … industrial area)
- Intensity of land use (utilization of the plot based on floor area ratio and plot ratio, eaves and ridge heights, number of floors)
- Building method (detached, semi-detached, or other)
- Plot area to be built on (actual building boundaries/lines)Matthew03 schrieb:
I have to, so to speak, disagree again on behalf of @Escroda 😉 , Well, then at least the Leaning Tower of Pisa would be allowed to have a flat roof – when calculating the floor area ratio based on "one-and-a-half-storey buildings," possibly with a setback floor, here at least without strictly defined recesses.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
H
hampshire8 Dec 2020 18:22blockschrift7 schrieb:
When do I actually need retaining walls? Or rather, when do I have to support the slope? You need to support the slope to prevent it from sliding downhill and to protect your house from damage in case of any movement. A house exerts pressure on the slope in its immediate vicinity. The slope must be able to withstand this pressure and may require reinforcement.
If the slope is far enough from the house, a gradient of up to 60 degrees is acceptable. Instead of using L-shaped retaining blocks, natural stone can also be used. It is also possible not to retain the entire width continuously but to leave gaps, thereby shaping the terrain more naturally and preventing the construction from appearing too massive.
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