Can you build vertically stacked farms, or build a house on top of crops?

Vertical farming on White Tiger is acceptable if done in a manner that can be considered realistic compared to irl "hydroponics", typically the government will have guidelines on it (or provide when asked), like a specific amount of lights and water sprinkling through pipes to ensure a bit better balance for the saved space. It's a simple law violation, not a rule violation. (On White Tiger there is text laws that apply as automatic laws would, just manually - but they are not server rules and don't cause any consequences of administrative nature)