Typically it's having no gutters, or the downspouts drop all their water right next to the house. If the left side of your house is the problem you will probably need a bobcat but that tree and roots may be havoc. You have to keep at least 8" of your foundation exposed, it sure looks tight there on the left side. Usually you need to keep it sloped an inch for every foot. I personally like to have 12" exposed as from experience all the areas of my house that are less get bugs finding every nook & cranny to sneak into while those 12" pretty much get none.
For the rest of your house you could have fill brought in and slope it away, it should be clay to have as much water as possible drain without absorbing but it is looking like a bobcat or something. A bulldozer will make real quick work of it and would also make quick work of that banking if you want more room, and bulldozers slice through roots.
Just watch out if your breaker panel is on that side, typically they have to put in 2 grounding rods and if your panel is on that side that's where they would bury them. I've found mine accidentally rototilling, they were only about 2" below the surface.