If the wall in my basement is leaking very slightly, is the main/only solution to the actual water issue to add grading outside? What else?
It is under a deck, which I can rip up a bit and fill with dirt, but is that likely to solve it?
We noticed from slightly bubbling paint and efflorescence.
You can install drain tile outside to route water away from the house, but that depends on the rest of your property, and if you have anywhere to redirect the water to.
You can also dig out around that wall and apply a water sealant, or other water mitigation to the outside of the wall.
There are a few options, but most of them are going to require moving a lot of dirt.