From the perspective of geomantic omen, I am on an equal footing with my brother's house, but he deliberately raised the water level by 2 cm. What is the difference or to me?

If the height of the house is similar to the height of the courtyard wall, there will be nothing in geomantic omen. But his family, according to what you mean, raised the ground of the self-driving home, which directly led to the leakage of his wealth! ! And there is no feng shui disadvantage for you.

Good luck, just try to keep a good relationship.