If it is summer, it is a good thing. It's cooler, but it may be colder in winter because of insufficient sunshine, but the impact will not be particularly great.
You can check the relevant housing construction plan regulations. If his house is too high and violates the relevant building height regulations, you can complain and report, and let the management department come forward to let him lower the height.
Don't worry too much if you don't violate the rules.
If you think it's a feng shui problem, you don't have to consider it, because it's artificial and has advantages and disadvantages.