Garage underpinning?
Discussion
Have bought a designing (cheap) laptop package and have been playing around with countless extension options for our house.
One area which I'm focusing on now is the garage I'm intending on doing 1.5 times the usual width of a standard single (don't hae exact measurements to hand but the idea being that in one side I could house tools and stuff. But then I thought about what if I created a room under the garage the idea being that I could store two cars double decker if you like and a lift system which would raise the car beneath to ground floor level which could then be used to drive out. Clearly it couldn't be used to life if ground floor garage was occupied.
It may be that the underpinning simply stays as an unused space or cinema room. But kind of interested if its a viable option or purely an idea to kick into touch.
One area which I'm focusing on now is the garage I'm intending on doing 1.5 times the usual width of a standard single (don't hae exact measurements to hand but the idea being that in one side I could house tools and stuff. But then I thought about what if I created a room under the garage the idea being that I could store two cars double decker if you like and a lift system which would raise the car beneath to ground floor level which could then be used to drive out. Clearly it couldn't be used to life if ground floor garage was occupied.
It may be that the underpinning simply stays as an unused space or cinema room. But kind of interested if its a viable option or purely an idea to kick into touch.
B17NNS said:
If attached you'd need to underpin the house. Major ball ache.
No way you can keep it detached?
No has to be integrated else 2 storey cannot happen - garage is about 2.5 meters away from the house currently and 1 meter from the boundary. Idea being to try to increase it min 2.5m width and maybe up to 3.5m. No way you can keep it detached?
Seems so far it doesn't pass the sniff test of viability unless pockets are bottemless
t, find yourself an architectural technician and they can do all that is needed for a job like this.
B17NNS said:
If attached you'd need to underpin the house. Major ball ache.
No way you can keep it detached?
Depends on the existing foundations and ground levels. We've just attached our previously detached garage onto our house and stuck rooms over the top without underpinning. No way you can keep it detached?
IIRC I paid the architect and structural engineer a little over £1000 combined.
Here's ours if you're interested: http://www.eastleigh.gov.uk/fastweb/detail.asp?Alt...
As I understand it, adding a basement would have made the foundations VERY much more complicated.
Edited by kambites on Sunday 30th December 00:51
So, just to clarify, you have:
1) a garage which is attached to your current house
2) you want to demolish this
3) and rebuild a new garage with a basement underneath it?
If the above is correct, then you won't have to underpin the garage because to achieve a basement the same size as the garage the hole dug will be quite a size bigger than the existing foundations, so they will be lost during excavation. You will most likely have to underpin the house as it is very likely you will be going deeper than the exsiting foundations.
This is a very expensive way of getting a cinema room because of all of the excavation, reinforced walls, tanking, etc. It would be much cheaper to put the cinema room in the roof of the new build, you'll be needing new roof trusses and a roof anyway, so the incremental cost for putting a room in there will be minimal.
1) a garage which is attached to your current house
2) you want to demolish this
3) and rebuild a new garage with a basement underneath it?
If the above is correct, then you won't have to underpin the garage because to achieve a basement the same size as the garage the hole dug will be quite a size bigger than the existing foundations, so they will be lost during excavation. You will most likely have to underpin the house as it is very likely you will be going deeper than the exsiting foundations.
This is a very expensive way of getting a cinema room because of all of the excavation, reinforced walls, tanking, etc. It would be much cheaper to put the cinema room in the roof of the new build, you'll be needing new roof trusses and a roof anyway, so the incremental cost for putting a room in there will be minimal.
I had a similar idea to the OP, although mine was to be an above ground outbuilding away from the house with a basement room below it that would double up as a bunker for when the UK gets nuked. In principle it seems quite doable, taking into account the reinforced roof/floor and any damp proofing and keeping water out etc. I stopped when I looked at the sheer amount of earth to be excavated etc. though.
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