Sounds like a lease or rental agreement issue that should be resolved by your landlord. If, in the agreement you signed to live there, specifies that you are to be given access to a parking spot to go with your boarding, then the landlord has two options, make the guy learn to park, or potentially face legal retribution for breach of contract. Do NOT tell this to the landlord, because it will almost certainly cause you trouble. Review your agreement and take note of anything specific about the parking situation. If you find anything, take the agreement to your landlord and have them take note of the specifics. This works better if you can point to the issue or provide photographic evidence of him leaving you no space.
If you don't have a lease or rental agreement... Buy an old junk car, heavier the better and crusher-bound, and park it in your spot in such a way that it leaves him no room to maneuver. Since it sounds like you're having to find alternate parking anyways... Four flat tires, damaged (read, welded solid) rear differential, for sale sign on the window for a nice touch. If you luck out, he might hit your 'fixer upper' car and dent it. When it's all over, you can sell the car to another junkyard and likely make a little side money while giving him a taste of his own medicine.
Or in the middle of the night you could key his van, flatten all four, and blame it on 'kids watching too much TV'. It'll work here in the states, and likely would work abroad depending on location. (It'd fall flat if you didn't live somewhere there is electricity.
)
ahh...forget it...
