My garage has no power.

I'm half considering a plug in hybrid car. I would need power to my garage as I park next to it, not my house.

The garage is about 15 meters from my house. The pwoer would have to go through my garden and around / along two other garages in the same block as mine. I think the owners of the othe garages would be fine with a reasonably neat job. I'd ask them first obviously.

Any idea what's involved? Would the wiring have to go underground? Could it be put along my fence which meets the garage block?