Firstly I'm not a lawyer so this is to best of my knowledge, I stand by to be corrected by learned ones.
Originally Posted by
GREML1N
How much Airspace do I actually own above my property or land ?
None of it. You own the land, not the air.
Can anybody fly through it without my permission ?
Yes. There are other legal considerations that
some of the people flying through it have to follow, in particular the ANO, but you have no control over that.