I built my first house over the slope on the main property, which has some un-cut-down-able grasses on it. The house did a nice job having a raised foundation to make it level and I thought it looked nice for it to be built into the slope like that. However once I finished building it, the grasses show through the floor and it just looked kind of silly so I ended up moving it to flat ground where I can manually cut down the foliage.