Hello, I’m new to the forum and we are currently busy planning our first house. For cost-benefit reasons, we decided against a basement and expect the building’s exterior dimensions to be about 11 x 9 meters (36 x 30 feet). We are still in the initial planning and decision phase and have not chosen a company yet, but we have already received some house offers.
Now to the problem:
On the plot where we want to build, there used to be a house with a basement that was demolished. As a result, there is quite a large “crater” with depths of about 1 to 1.5 meters (3 to 5 feet), although the ground is very uneven. The soil mainly consists of sand and some mineral concrete.
The question that comes to mind is: since we want to build with a slab foundation, a lot will need to be done with the hole first—backfilling, compaction, etc. I just can’t imagine what extra costs this might involve, whether it will stay within a reasonable range or quickly become a five-figure amount.
One construction company even said (they know the plot) why build without a basement if much of the soil is already removed.
We are now a bit uncertain.
Hope you can help me out a little.
Greetings from Franconia
Now to the problem:
On the plot where we want to build, there used to be a house with a basement that was demolished. As a result, there is quite a large “crater” with depths of about 1 to 1.5 meters (3 to 5 feet), although the ground is very uneven. The soil mainly consists of sand and some mineral concrete.
The question that comes to mind is: since we want to build with a slab foundation, a lot will need to be done with the hole first—backfilling, compaction, etc. I just can’t imagine what extra costs this might involve, whether it will stay within a reasonable range or quickly become a five-figure amount.
One construction company even said (they know the plot) why build without a basement if much of the soil is already removed.
We are now a bit uncertain.
Hope you can help me out a little.
Greetings from Franconia
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Peanuts7427 Mar 2017 09:30Gartenfreund schrieb:
Yes, Alex, you're right. However, the cistern was only installed to save on rainwater charges. So this system basically pays for itself after about 5 years.It depends on the size of the garden. Also, many have connected the toilet flush or even the washing machine to the cistern.
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Peanuts7427 Mar 2017 09:35Timo12345 schrieb:
Thanks already for all the help.
On Saturday, the excavation contractor for the neighboring plot happened to be there, and they have already moved quite some soil on that site. (They also demolished the old house, which is basically responsible for the crater.)
They were fairly confident that due to a slight slope, meaning the height gradually drops towards the garden at the back, some leveling would still be necessary, and the soil seems to be suitable for reuse, plus whatever excavation material the neighbors have left over (they will receive their soil report in June).
So this means we probably won’t need that much material after all. We’ll see, and for now, we can definitely approach the issue of additional costs with more peace of mind.Depending on what you pay for fill material, labor and equipment rental are the expensive factors.
As I said, I paid about €80 (~$85) for the material with a bulk discount for 20 tons.
But what I keep wondering,
there was a basement, and now there’s only a 1 to 1.5 meter (3 to 5 feet) deep hole???
The basement wasn’t only 1 meter (3 feet) high, right? Did they just dump a lot of material into the hole? That would have to be removed again first.
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Timo1234527 Mar 2017 10:41The neighboring house was connected to the demolished one, and during the new plot division, the owner had to build up quite a bit on their side for the facade and insulation. The remaining excavation pit is now located on the newly assigned plot, which now belongs to us.
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Timo1234527 Mar 2017 10:42We have set up the tape measure. This is just to mark where the new house will be.
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Peanuts7427 Mar 2017 10:49Hmm, this can probably only be assessed up close. There is no sign of a basement anymore, right? However, I would assume that where grass is growing, there is still organic material that needs to be removed beforehand.
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Timo1234527 Mar 2017 10:57This is not grass; these are branches from old trees, there used to be many coniferous trees here.
But a layer will definitely need to be removed.
But a layer will definitely need to be removed.
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