To service two homes on one allottment can this be done without demolishing he two homes already built there and how costly would it be.Tremenduous ? Doable?
You have 2 existing houses , and want to add a basement garage , is that right ?
Give up now would be my advice . If it wasn't originally designed , you are going to have all kinds of practical and planning problems -- you can't just dig a hole , line around the edge and pour a floor .
The house will be on piles ( stumps ) or concrete pad or some form of a base -- all are designed to connect with the ground -- take that away , and it very likely will sag .
Then there's the services -- water , waste , power .
Then there's subsidence , flooding , slopes , all kinds of engineering hassles .
Basically , give up .
Basement garages ?
Floorplan feedback request
Single skin garage- waterproofing options
Facade materials & colour scheme
Existing garage to be converted to a habitable room? Need Consultant??
Are you in australia?
Without knowing more about the site and soil and extisting structures we can only speak in generalisations.
It is doable, I have seen it done, but it was in the richest suburb in town.
I agree with Pottsy. The engineering involved to maintain the houses above safely is not cheap. Digging down underground means dealing carefully with drainage. It's possible that once digging starts something could be found which adds even more to the cost.
I've never done it , and I might be on the wrong track as I initially assumed digging down , but thinking again , I suspect you'd be better to lift the house or houses , 'do' a basement out of concrete blocks or poles or beams or similar , install support beams , then slightly lower the lifted existing house onto the properly engineered basement . Probably be cheaper , probably less hassles , probably better in the long run , but with more enthusiasm than experience , I could be wrong haha .
it's very common to raise lightweight timber framed and clad homes to add a downstairs so no reason why you couldn't raise the house to add a garage and/or downstairs rooms and even dig out a basement garage but it might be more cost effective to knock down and rebuild but what is the width and length of the whole block, what are the two homes built out of, how are the two homes located on the block, how much driveway and parking space is available...a site plan and photos might help explain existing
Like a Queenslander? I've seen those raised on tv shows for sure. I suppose any house that can be sold and taken away by a house removalist can be moved in its own location too, if there's access. For some reason "two homes already built there" made me think at least one is likely to be a standard sort of brick veneer, like a later additional to what was originally on the block? But so far it's all guesswork.