Does anything need to be done to prep the ground before building a low height deck?
The biggest concerns I would have are things growing under the deck and critters moving in. I would grade the area to help with drainage so water won't puddle and spray the area with round-up or something similar.You might want to cover the ground with landscapers fabric so nothing can take root.Then spread a layer of crushed stone to hold it all in place.I would make sure the sides are covered with lattice maybe even put window screen behind it.This would still allow ventilation but keep out the critters.