Revisions log for Answer #593
This is the answer to the question What to expect by building an underground garage on a slope?
Revision 1
Can you imagine a "three-quarters buried" garage?
What would be above the garage or on the "garage roof"?
How much it would cost is a matter of region, local conditions and design. I'm thinking of building with a basement first and foremost – it makes everything into a whole. Ask about that. You could also build two concrete foundation walls to support the ground and then cover the parking lot between the outside basement wall and the built foundation wall. This would be a sort of low-lying carport – it also works with a gate and is quite suitable for vehicles. It is doubtful, however, that it would be much cheaper.
I think it's good to have room for a caravan; we built our caravan pretty high. Think about an outlet for the on-board battery; if you have a roof over the solar panels on the camper, you won't get any more electricity from there.
Will it be uneconomical? Presumably, every garage is uneconomical. Protecting the car, and therefore preventing loss of value, probably pays for the cost of construction only in very rare cases.