From: The Spruce
Many homeowners are unaware of how much slope (grade) is needed around a house foundation. This is an important issue, because if land grading is not done properly, runoff can be directed toward your foundation. This unwanted water can eventually compromise its integrity.
If the ground around your house is completely flat or, worse yet, slopes down toward the foundation, you could easily develop a drainage problem at some point (assuming that you do not already have one).
So how can you determine if your home “makes the grade?”