ᐅ Preparing the Site for a Concrete Slab on a Gentle Slope
Created on: 29 Aug 2023 16:09
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Peregrin T.
Hello everyone,
we are planning to purchase a plot of land with a slight (?) slope.
As shown in the attachment, the plot is between 24m and 37m deep and 16m wide. However, 3m of the plot’s width is restricted by a public easement for infrastructure, so no changes should be made in that area.
I have marked the possible building area and also a preferred floor plan (dashed line) on the plan.
What we are wondering now is how much effort it would take to build on this plot with a slab foundation, that is, without a basement. As you can see, within the preferred building area there is a height difference of up to 80cm (31.5 inches). In addition, there is a height difference of about 60cm (23.6 inches) from the edge of the desired house position to the easement area. The distance between the desired house position and the easement is approximately 1.6m (5.25 feet).
A soil report is currently in progress, but generally, clay soils are predominant in our region.
We are now wondering to what extent the plot is buildable as we envision it, and what measures might be necessary (e.g., supporting the ground towards the easement).
We are also willing to consult a specialist but are unsure who the right contact would be.
Best regards and thanks in advance
Perigrin
we are planning to purchase a plot of land with a slight (?) slope.
As shown in the attachment, the plot is between 24m and 37m deep and 16m wide. However, 3m of the plot’s width is restricted by a public easement for infrastructure, so no changes should be made in that area.
I have marked the possible building area and also a preferred floor plan (dashed line) on the plan.
What we are wondering now is how much effort it would take to build on this plot with a slab foundation, that is, without a basement. As you can see, within the preferred building area there is a height difference of up to 80cm (31.5 inches). In addition, there is a height difference of about 60cm (23.6 inches) from the edge of the desired house position to the easement area. The distance between the desired house position and the easement is approximately 1.6m (5.25 feet).
A soil report is currently in progress, but generally, clay soils are predominant in our region.
We are now wondering to what extent the plot is buildable as we envision it, and what measures might be necessary (e.g., supporting the ground towards the easement).
We are also willing to consult a specialist but are unsure who the right contact would be.
Best regards and thanks in advance
Perigrin
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Gerddieter29 Aug 2023 19:46Get offers for a house with or without a basement.
Get offers for civil engineering work with or without a basement.
That way, you will know exactly what the price difference is. For me, it was 70,000 (70k). Building without a basement is also feasible.
GD
Get offers for civil engineering work with or without a basement.
That way, you will know exactly what the price difference is. For me, it was 70,000 (70k). Building without a basement is also feasible.
GD
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WilderSueden29 Aug 2023 20:18Peregrin T. schrieb:
We expect costs for the house including the foundation slab of up to around €400,000. For what size? That budget is quite tight. There isn’t really much room for a basement in that. But you shouldn’t only look at the house costs alone; you need to consider the land and house together, including the planned outdoor areas.
Our plot has a similar slope (2m (6.5 feet) diagonally across, of which about 70cm (28 inches) is within the building area). The house is slightly set into the ground on one corner and comes out on the other. The adjoining terrace accentuates this and extends even further outward. You also don’t have much space for stepped retaining, especially at the rear access driveway. It’s possible that you will need to support not only the soil but also part of the house. I would definitely avoid making any firm decisions without first reasonably estimating the necessary work for the outdoor areas.
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hanghaus202329 Aug 2023 21:08Is there a development plan?
A 10% slope is just about the limit where having a basement makes financial sense.
A 10% slope is just about the limit where having a basement makes financial sense.
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Peregrin T.29 Aug 2023 21:48WilderSueden schrieb:
For what size? That’s already quite tight. There’s not really any budget left for a basement. But you shouldn’t just look at the house cost alone in this whole situation, you need to consider the plot and house together, including the planned outdoor areas. Between 140 and 150m² (1500–1615 sq ft) over two floors. We have already conducted an example selection and decided that we can pretty much live with the standard options everywhere. If we build with a basement, 130m² (1400 sq ft) would also be sufficient for us.
WilderSueden schrieb:
Our plot has a similar slope (2m (6.6 ft) diagonally, about 70cm (28 inches) within the building area). The house is slightly embedded on one corner and comes out on the opposite corner. The adjoining terrace increases this effect and extends even further out. You also don’t really have much space to terrace the slope, especially towards the access road behind. That means you might not only have to secure the ground but also part of the house. I would definitely not settle anything here without at least roughly calculating the necessary work for the outdoor areas. How did you eventually implement it?
hanghaus2023 schrieb:
Is there a development plan?
A 10% slope is right at the limit where a basement makes sense economically. There is no development plan. The construction must align with the neighboring buildings, and we have already had a brief consultation with the city regarding this.
Peregrin T. schrieb:
Between 140 and 150m² (1507 and 1615 sq ft) over 2 floors, we have already done a sample selection and decided that we can pretty much live with the standard specifications everywhere. If we build with a basement, 130m² (1400 sq ft) would also be enough for us. Sample selection suggests quite specific ideas about the house, while the figures mentioned do not.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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WilderSueden30 Aug 2023 08:3711ant schrieb:
"Selection of finishes" sounds like quite specific ideas about the house, but the numbers mentioned do not. To me, this story sounds like a particular prefab house manufacturer has already been chosen, which is why the preliminary selection of finishes is taking place. Now they "just" need to pick the right house from the catalog and have the draftsman place it in the building permit / planning permission application. That’s also why they talk about preparing the plot.
To me, this screams expensive surprises later on.
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