ᐅ New Basement Beneath the Foundation of an Existing House

Created on: 7 Dec 2021 21:59
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Chris-Cross
Hello everyone,
I’m new here and have a feasibility question. It concerns a house that already has a basement and a foundation about 1 meter (3 feet) thick. The house was built in 1964. My question is whether it would be possible to expand the basement below this building, more specifically beneath the foundation (which I think is a better option than breaking up the foundation), potentially adding two underground levels. At the rear, there is plenty of green space adjacent to the property, and behind that are houses we also own and rent out. If this is possible, how would you estimate the costs?
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Pinkiponk
9 Dec 2021 10:28
11ant schrieb:

I have two quick questions:
1) How old are you?
2) What do you smoke?

Could you please explain, for people like me who might have trouble understanding, ;-) why you are generally opposed to this project?

(Basement rooms can also potentially serve as safe rooms.)
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Pinkiponk
9 Dec 2021 10:31
Since I am very interested as well: Could we have a full discussion of the pros and cons? I am not able to make sense of the previous answers.
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Benutzer200
9 Dec 2021 10:43
Chris-Cross schrieb:

The lower part is intended for an underground parking garage (also accessible for the adjacent rental buildings). The part above will be a large workshop/storage area and laboratory. Besides, I somehow like such buildings.

I hadn’t considered that before. This will make it especially expensive. An underground parking garage is a commercial use (at least at the size you have in mind), which could already be prohibited as such. On top of that, there are strict fire safety requirements. The access and exit routes will also be challenging.
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Benutzer200
9 Dec 2021 10:46
Pinkiponk schrieb:

Couldn’t we fully discuss the pros and cons?

Discussing the pros and cons of a basement? Then the discussion needs to be based on the actual design plans. After all, it should be understood that a basement is usually dark and underground ;-)
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guckuck2
9 Dec 2021 10:52
Myrna_Loy schrieb:

Maybe one of the James Bond supervillains can recommend their planners – after all, they manage to turn entire volcanic islands into world-destroying factories without anyone noticing. 😉

Consider moving to the Ruhr area. You will quickly hear stories about (former) miners who have manually expanded their terraced or pit houses downward afterward.
Whether these are urban legends or true, I cannot say.
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Myrna_Loy
9 Dec 2021 11:03
guckuck2 schrieb:

Try moving to the Ruhr area. You will quickly hear stories of (former) miners who manually extended their row/terrace houses downward afterwards.
Whether this is urban legend or truth, I cannot say.

Did Schneewittchen want their own bathroom?