We just bought a house and the house has a (or once was, at least) a nice shed in the back with both water and power. Image is to scale (the shed is 12' x 12').
The problem is that erosion from the neighbors next door has caused the ground to "rise" against the slab and now the bottom sole plates are rotted out and every time it rains, water comes right into the shed through holes in the rotted siding.
My project is to fix the shed and make it usable for storage, but I'm trying to figure out what's the best approach to keep additional runoff from making my work an expensive trial-and-error process.
Best Answer
You can place a french drain on that side of the shed.
The other thing you should do is to find better material for those sole plates - I am thinking they are 4 x 4 all around - so you might try something like "Plastic Lumber" - there are many composites out there as well. This will eliminate your issues. You can search for plastic lumber or composite wood 4 x 4 as well..
The real issue is as one commenter stated the runoff from your neighbors - I see a chicken wire fence (perhaps chickens - if this is in the county and not the city - you may not get the support to resolve the issue form your neighbor, as the requirements may be much more lax.