ᐅ Demolition of a house with a basement, new construction without a basement
Created on: 13 Dec 2020 22:56
H
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?
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?
Hemi5.7 schrieb:
The plot of land already belongs to me, not the landlord.That’s unfortunate. I wish you even more luck!https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
11ant schrieb:
Tough luck. I wish you even more luck!Why tough luck? I inherited the plot of land....
Hemi5.7 schrieb:
Why did it go wrong? I inherited the land... Oh, I thought your landlord was the one driving the initiative in this case. So you’re the owner, and your potential builder happens to be your landlord, rather than your landlord wanting to become your builder. Okay, if that works like a shoe fits, then it can work the other way around too ;-)
Since you already own the land, a developer solution is obviously off the table. But hiring him as a general contractor (GC) and bundling demolition and new construction into one package is definitely possible. Just be cautious and calculate that significantly less than the expected demolition volume will actually be reusable, or that the compacted volume will be less than anticipated. Send the house plans to basement specialists and verify how accurate their estimates on additional costs are. At first glance, I don’t see the land justifying an above-average price—unless the relatively large planned basement is due to rock formations or groundwater conditions.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
11ant schrieb:
Send the house plans to basement specialists and verify how accurate the estimates for the additional cost are. At first, I don’t see the plot justifying an above-average price—unless the relatively deep basement is due to rocky ground or groundwater conditions.This matter is increasingly giving me a headache. I have the designs for the house here, but not for the basement. There is no design for it because we originally said we would build without a basement.
The house we want to build is already built a few streets away, also without a basement.
The builder gave me 100,000 as a rough estimate for a waterproof concrete basement (a “white tank”). He does not do traditional damp-proof (a “black tank”) basements.
Maybe the basement contract should simply be subcontracted to a basement specialist, and then the builder continues construction from the top edge of the basement?
Originally, I wanted to have everything from a single source.
One more thing. Yesterday, my father came up with an idea. The plot is about 0.5 m (1.5 feet) lower than the street. We could build a traditional damp-proof (black tank) basement at the same depth as the current basement. That way, it would protrude quite a bit, and then the plot could be filled up to match the street level. So, in the end, we would get a completely normal basement with a standard depth.......
Hemi5.7 schrieb:
I have the designs for the house here, but not for the basement. There is no design for it since we originally said we would build without a basement. [...] Maybe it would be better to outsource the basement to a specialist basement builder, and then the general contractor continues building from the top edge upwards? That was exactly my thought. The basement builder only needs the ground floor plans to know where the load-bearing walls will be above. Consider the basement in this sense as a slab with technical and storage rooms.
Hemi5.7 schrieb:
Originally, I actually wanted everything from a single source. The general contractor can subcontract the basement builder and manage construction for both, you would just handle the tendering process.
Hemi5.7 schrieb:
One more thing. Yesterday my father gave me an idea. The plot is about 0.5 m (1.5 feet) lower than the street. It should be possible to build a regular basement as a waterproof concrete structure (“black tank”) at the same depth as the current basement. So that it would protrude quite a bit, and then backfill the plot to match the street level. In principle, that’s not a bad idea, especially since you probably wouldn’t want the house without a basement below street level anyway – also considering the issue of a sewage lifting station. What was the original plan for that?
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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