Are there any setbacks?
It has to be 3' from any property line. The fence between my neighbor and I sits level on our side but there's a slope on their side, so I don't want to be piling dirt or anything else over there. Also, the fence is starting to slowly fall apart (a couple slats are coming undone) so sooner than later we'll have to come up with a fair solution to repair it. I might be willing to give a shot at DIYing the fence repair - the neighbor on the other side (2 doors down) offered to fix part of the fence between the two of them and it looks pretty good.
Anyway, this is a very rough estimate of where it *could* go:

The other option, of course, is to build a smaller shed :)