ᐅ Demolition of a house with a basement, new construction without a basement

Created on: 13 Dec 2020 22:56
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Hemi5.7
Hello dear forum,

I registered here because I am planning to build a house soon and still have some open questions.

On the plot where I want to build, there is an old house with a basement that will be demolished.

The new house will be an urban villa without a basement.

The construction contractor, who is also responsible for the demolition, told me that he wants to crush parts of the old house with a concrete crusher and use it to fill the excavation pit. The rest will then be filled with gravel/sand.

My question is: Is it common practice to use material from the old house to fill the hole under the new house? And are there any special considerations to keep in mind when demolishing a house with a basement and building a house without a basement on the same site?
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haydee
14 Dec 2020 11:39
Why do you recommend that?

I’m also in favor of demolition. Just be careful about the costs for breaking and filling in, and also watch out for pollutants.
Nida35a14 Dec 2020 11:43
Hemi5.7 schrieb:

Are there any other special considerations when demolishing a house with a basement and building a new house without a basement on the same spot?
Yes, when demolishing, make sure to disconnect all utilities: electricity, water, sewage, TV, gas, and possibly seal them off to reuse in the new house, which might be more cost-effective than installing everything new.
11ant14 Dec 2020 11:57
haydee schrieb:

Why do you recommend that?

There is a developed plot with a structure that is partly still usable and partly a surprise package, and an owner who wants to demolish the building and replace it with a villa. He is trying to make this appealing to someone who currently trusts him as a tenant. By now, I know my partner well enough to recognize her frown even from twenty meters (about 65 feet) away at this hour ;-)
So, wait until the planned redevelopment process is successfully completed and an inspector has reviewed everything and given the go-ahead to buy without concern. For now, don’t do anything beyond a preliminary contract; plan the house in agreement and agree to take delivery only under the condition of flawless completion (once the bank has approved, of course).
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Nida35a14 Dec 2020 12:43
Just ask where the old soakaway pit is located and what it has been filled with (by any chance the old asbestos roof from the 1970s),
uh-huh,
why a waterproof concrete tank for the basement,
due to soil layers or groundwater?
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haydee
14 Dec 2020 12:46
@11ant
In your summary, I sense more than just a frown. It brings to mind a kidney stone and lunch. You are right. The warning signals are getting very, very loud.
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Hemi5.7
14 Dec 2020 13:38
11ant schrieb:

There is a developed plot with a mix of still usable parts and surprises, and an owner who wants to plow the building under the field and top it off with a villa. He wants to make it appealing to someone who currently trusts him as a tenant. By now, I know my partner well enough to recognize her frown even from twenty kilometers (12 miles) away ;-)
So, wait until the planned refinement process is successfully completed and an appraiser has reviewed everything and given the go-ahead to buy without any concerns. For now, don’t do anything beyond a preliminary agreement, plan the house in cooperation, and commit to acceptance only on the condition of flawless completion (once the bank has agreed, of course).


The plot already belongs to me, not to the landlord.