Don't move to Davis, CA. They will make you rip up sprinklers if not installed with a permit. So it depends.
In my county the minimum permit fee is $100. That's what I got since I and a friend did all of the work.
You can get a permit after the fact in many cases. I only had the final on mine and the inspector expected it to be covered with the drywall on it and called me out for not having it covered.
After I showed him the drywall pieces all ready to go we spent more time discussing EV's and doing a Tesla demo.