Probably the wrong board but not sure where to post this.
Ive had this idea for some months now and was wondering how much it would cost. Dont laugh but a huge underground basement the size of a football/soccer field.
Granted there are a lot of variables such as what do you even want to put in there? A pool? A huge garden? Luxury bs?
Disregarding the actual land plot costs and getting the ok from the city, what would the raw costs of such a project be? So concrete case, ventilation, laying the wires etc.
Just mental gymnastics but its fun to think about and who knows, maybe it would be possible in a 2nd/3rd world country where construction crew and land costs are much cheaper
>Granted there are a lot of variables
start with beams 50 and 100 yards long, unless your pool is going to be full of columns.
I wouldnt want the whole thing to be a pool, worded that wrong sorry.
you could put a pool in there, a shed, a garden, a tennis court etc. , the prices would of course vary depending on what goes there.
just asking for a concrete/steel shell, the wiring and ventilation
500k easily, for it to be safe, well ventilated and with at least two extra fire escape routes. And even more if you have a high water table that requires special waterproofing measures and pump stations.
just that? I was imagening millions
It would be millions. A soccer field is 81,000 sqft, assuming $30 per square foot of basement (which is way cheaper than you'd get) it would be around 2.5 million.
maybe even billions.
the basement has fallen
this is laughably low
this is more reasonable starting point, you could look at underground parking garages as a similar cost. Those could probably be made from around 6-8 million on the smaller end
It would be way more than doing a large garden, pool, whatever else normally.
thanks fren, very informative!
Not a dumb idea, it can be done really cheaply with a shipping container, just hire an excavator, dig a big trench, bang the shipping container in, cover with dirt and you've got a comfy underground pad read to go
Just as a friendly reminder, please do not do this. The container WILL be crushed. There are images on the Internet about exactly this.
A crazy person on PrepHole. Who would have thunk?
a clueless helpful boomer on the internet. what are the odds.
Im just happy 2 frens are responding to my thread 🙂
>maybe it would be possible in a 2nd/3rd world country where construction crew and land costs are much cheaper
...and safety standards are much looser, so you can do whatever you want, and then it collapses, like the Korean Death Mall in the 90s after it was constructed a few years ago, when the super rich guy fired the guy who said they can't suddenly make it 5 storeys when the original plan was 4 storeys, stacked the heavy food court at the top, etc.
PATH is a series of underground or partially underground malls connected by tunnels in Toronto, Canada, you might want to look into that. One thing some places do is a basement with a really high ceiling, maybe two storey in some places even, like a normal first floor plus a normal basement -- this creates a basement with a lot of light through the first floor window, but it's still very cool in the summer.
There are some downtown stores where the storefront is street level, immediately there is a storefront-wide stairway down to the basement, and through the stairs there is natural light shining below, a lot of Home Hardware have this layout and they could have long ladders strapped to the wall.
Look at mike oehler's underground housing books. He did one dvd set that is floating around somewhere online. Parts 1&2 are the nuts and bolts. 3 is mike's speculations about what might happen. 1&2 though are worth it.
You also want to look into Ben Davidson's Suspicious0bservers. SunWeatherMan on twitter/x. While Mike and many other northern white folk have had premonitions of something happening in the future to prepare for, they have frequently, in the public eye, gotten involved in cults. End of the world cults. The issue is, science from the same people (who have winters, who therefore necessarily have an intuitive side to look forward and store resources) has been squashed in the public, with the NSF paying hundreds of millions (probably more) over decades to sponsor gradualism. So they don't see science connecting with their instinct, instead blaming it on the coming of Christ, or a comet, etc.
If you know anything about non-invasive, no side effect, permanent approaches to healing, you know that if you want funding for a double-blind university study, you'll be scraping together for a couple of hundred thousands. Vs millions if you want to push some mentality of the psychopharmaceutical/patent drug/bank/insurance cartel scams on health.
Science is the same way. What gets published into the public eye, is sleepy gradualism. But, say you had an earth shelter, with stored resources, that was protected from solar micronovae outbursts, while the earth's magnetic shield was weakened? That no one could see or find, because you used natural earth in contour with the land, to help you hide your spacious building?
That's what's coming. You've got 10-15 years tops, before the main event. Going back to things like the Carrington Event, that was a small foreshadowing of what is to happen later. Because of less-filtered media(medium of communications), and books like World In Peril, word is spreading.
That thing would have to be VERY deep for there to be any chance that grass/vegetation would grow on the soil above it. It's due to a situation involving the relationship between topsoil, groundwater, wicking & moisture retainage. For that reason I'd say the excavation costs could be double the cost per sqft of digging a standard house basement.
The flat ceiling/roof structure, including beams, posts, etc. would also need to be way, way more beefy than a normal flat roof structure. I'd imagine it would need to be engineered to carry like 5x the load that a normal flat roof system would usually need to carry. Or more, depending on how far below grade it needs to go for the drainage/moisture issues I first mentioned.
These are just the first 2 things that come to mind. There are many more major issues that this would involve, however I don't feel like typing any more and this whole thing is a really, really, really stupid idea. And it's not like you're going to do this shit, if you were serious about doing it and had the money to actually do it, you'd be inquiring with engineers, not asking about it here.
I'm not rich, but also young, ambitious and on a path that could lead to good wealth, so why not dream
Will look into that fren
I planned it to build it unter my house, but maybe the scale is too big and 2 tennis or a basketball court size would be more realistic
I could sell it as a bunker or do it in a eastern european country, that would atleast be easier compared to middle/north europe
you'd be better off building something aboveground, say next to a hill, and covering it up afterwards, if all you want is the cool aesthetic of going underground.
What says.
Cheapest in terms of material cost would be (connected) domes.
Cover them up if you want, but the cost for just the excavation will be insane.
No permit authority would ever allow this to be done, and you would most likely never be able to carry out a project of this magnitude without the permit authority finding out about it. So unless you live in some undeveloped 3rd world shithole it's never going to happen.
Why does OP want a huge basement, cause OP can combine 1st floor with the basement and that might be okay...or have the center of the house be opened like Eaton Centre Mall...I think they had two storeys above ground and two in the basement.
...a swimming pool surrounded by palm trees?
it would be comfy to go down some tunnels then be greeted in an almost fantasy like developed cave
Football field is kind of big, but this guy's site has lots of crazy ideas. I don't know how many hours I've spent looking through everything but still haven't read half of it. These two pages look at making pretty big spans.
http://harmoniouspalette.com/ArchedPurlinTruss.html
http://harmoniouspalette.com/Float_Extrude_Recurve/RecurveCableTrussArches.html
don't put a pool in your house. seriously
This will cost tens of billions, depending on your definition of "underground"
Imagine the cost of building a stadium
But it is buried, even if minimally you will need a roof to support a layer of dirt, plus all the drainage system that stops water from accumulating on it
If it is deeper underground your cost will increase exponentially because it becomes logistically difficult to excavate and engineer the roof
>If it is deeper underground your cost will increase exponentially because it becomes logistically difficult to excavate and engineer the roof
far easier to purchase an abandoned mine.
it is probably cheaper to build and engineer one from scratch, rather than trying to retrofit some tunnels and expend into football field sized cavern, simply because of complexity
start with an abandoned salt mine. location, what is under you and what you can legally construct - whether you even have mineral rights are all location specific. the fricking water table is more important than cost. I think upwards of $25 million without any kind of special finishing given the correct area. $20 million in a 3rd world country.
in other words it's fricking pointless to speculate.
hello mr duck good day! quack quack!