at 3:11:33 PM
Good Afternoon Jennifer,
Generally you want your deck off the ground enough to allow for adequate air flow underneath letting the deck dry out between rainfalls and not to have the ground moisture get trapped under the deck.
There is no minimum height the deck is required to be at. There is Building Code however for decks that are over 24" in height with regards to railings, footings and cantilevering. You would have joists as this is what the deck boards are attached to. You may not have beams or they could be rotted.
You can build with 2x6, 2x8, 2x10 or larger if you wish. The Contractor building the deck must follow Building Code for joist spans and spacing and beam location.as well as code for cantilevering beyond the beams if desired. When the Contractor applies for a Building Permit all these items are checked and verified by the City Planning Dept. before the plans are approved.
I have built a few decks close to the ground and used some ideas to have adequate airflow under the deck. A deck close to the ground looks great with its open space as it does not have railings and blends in nicely as additional space for your home.
If there is anything else I can answer or help out with such as designing a deck or offering you a quote Jennifer, please do not hesitate to contact me.