Hello sir, we just bought a 2-storey home which the Backyard is facing uphill slope then more houses on top of that uphill slope. The slope has a lot of greens and some flowers grown and mAintained very well by the association.  Drainage done very well too. Los angeles seldom rain, very dry and drought. Please advise if this is bad fengshui and what can I do to correct the bad fengshui? Should i add tall trees? My backyard is narrow not huge. The house number seems good it is ‘868’. Photo attached. Appreciate your time to help me!!

In my opinion, from your sole photo, looks good.

Since it seldom rains + under Shapes & Forms Feng Shui, the “back” (neighbour’s) is higher than your property.

Frankly, it seems, no need to do anything else.